Money transfer database design jobs

...creating an ER diagram, relational schema, database dump, SQL files, and queries for a library database system. Requirements: - ER Diagram: An ER diagram is required with rationalities similar to the example provided in this link: - Relational Schema: Develop a relational schema that effectively models the database. - Database Dump: Provide a database dump for the system. - SQL Files and Queries: The project should include a set of SQL files and queries that effectively interact with the database. - Managerial Queries: Develop a minimum of 20 managerial queries that will be used to analyze and manage the library database. Deadline: This project must be completed by Monday. Ideal Skills: - Proficiency in database design...

Implement Mac Filtering to allow specific Mac addresses to connect to a Windows Server 2016 and Windows 10 via Remote Desktop Protocol (RDP). Disable Right Click functionality for RDP users. Restrict Copy-Paste functionality (Ctrl+C, Ctrl+V) for RDP users. Implement measures to disable file transfer capabilities for RDP users.

...complex backend development and database integration tasks and run code as offline. Key Responsibilities: Develop, test, and maintain robust, scalable, high-quality software solutions. Design and implement new features and functionality. Write clean, maintainable, and efficient code. Develop RESTful APIs to support front-end functionality. Integrate user-facing elements developed by front-end developers with server-side logic. - In-depth understanding and experience of backend operations using Python Django. - Managing and integration of the database with the application. - Maintenance and improvement of existing codebase for optimal functionality. Desirable Skills: - Proven experience in Python Django for backend development. - Hands-on experience in databa...

I'm in need of an engaging blog post that covers budgeting tips and debt management as part of personal finance. The ideal candidate will have a good understanding of personal finance and the ability to write accessibly abou...The ideal candidate will have a good understanding of personal finance and the ability to write accessibly about financial topics. The post should be aimed at a broad audience, including students, young professionals, and parents. The target length is 750-1000 words. Key points to cover: - Budgeting tips that are easy to understand and implement. - Insightful ways on how to manage debt and save money effectively. - Practical and real-life examples that resonate with the target audience. Experience in personal finance writing or a related field would b...

I'm seeking a WordPress expert to i have 3 websites .. i want to copy one of them to the other 2 and transfer them from one server og GODADDY to A2 . i onlt want to cange the phto on the home page. so each one will have a different home page . I need all related work don to that so the 3 websites shall be up and running by Sunday.

I've compiled a comprehensive global leads database with 8 million entries. The database includes a variety of details such as name, email, contact number, website, profession, and even Instagram username. - **Purpose**: This database is specifically designed for sales leads generation. It's meant to help businesses and organizations reach out to potential customers and grow their sales. - **Categorization**: The leads are not just categorized by one specific filter. Instead, they're a mix of different categories from various industries, countries, and professions. This eclectic mix provides a wide range of opportunities for potential buyers. - **Delivery Method**: I'm looking to sell this database through a CSV file, online access to the...

MAX $60 As a business owner, I'm looking for a skilled freelancer to help me transfer an application from my old Windows server to a new one. The server is currently running on Windows OS and the application is built with Visual FoxPro 9 and ASP.NET Key Requirements: - Proficiency in Windows server management and application migration. - Experience with Visual FoxPro 9 and knowledge of its compatibility requirements. The new server must have the following installed: - ASP.NET Framework 3.0 or higher - Visual FoxPro 9 - Office 2019 Please make sure to include in your proposal any related experience and specific skills that make you a suitable candidate for this project. Project Description I'm currently in a bit of a tight spot. A Windows Server 2016 web application...

Commercial real estate agency database of GCC

About Plesk hosting upgrading the database from MariaDB 10.1 to 10.3 i would like to upgrade the database from MariaDB 10.1 to 10.3 for my hosting however, my hosting have a lot of client website in it, just would like to know if this upgrade will not affect the existing database thanks

...opportunity to make Good Money!!! Do you thrive in a fast-paced environment where your success is directly tied to your effort? Are you passionate about connecting businesses with the power of a stellar website? If so, we want YOU on our team! We're a High Converting Website Design Agency looking for a driven, commission-only sales superstar to join our ranks. In this role, you'll be responsible for: Prospecting and Cold Calling: You'll identify potential clients who need a website refresh or a brand new online presence. Be prepared to make a positive first impression and build rapport over the phone. Understanding Client Needs: You'll have a knack for uncovering a client's vision and translating that into actionable website goals. Selling Solut...

I am in need of a proficient developer to create a user-friendly, private gateway platform. This will allow guest users to register, log in, and top up credits using certain cryptocurrencies....BTC, Solana (SOL), Ethereum (ETH), and Monero (XMR) - Functionality to send these credits to any country - Customizable sender ID for promotional use Ideal Skills and Experience: - Strong experience in the development of Gateway platforms - Proficient in cryptocurrency integrations - Knowledgeable about various authentication systems - Proven track record with user interface design - Experience with international transfer functionality. This project is a significant endeavor, and I am looking for experts with a keen eye for detail and a deep understanding of cryptocurrencies and gate...

Self Managed Home Care Providers Database

I'm seeking a data entry specialist with a knack for precision to type data from PDFs into an online database. Key Requirements: - As a data entry specialist, you will be responsible for the accurate and timely entry of data from PDFs into our online database. - The data format should match the original PDFs, with no specific validation rules needed. - The ideal candidate will be detail-oriented, with a proven track record of data entry. If you're someone who enjoys working with data and has an eye for detail, this could be an ideal project for you.

...will be to move the existing content and design elements from WordPress to Squarespace. This includes reformatting and reorganizing the content to fit the new layout. While this isn't a large volume of content, attention to detail and accuracy are crucial to ensure a smooth transition. Experience and Skills: - Proficiency in WordPress and Squarespace: You need to have a strong understanding of both platforms to effectively manage the migration process. - Web Design: Experience in website design, with a focus on user experience, is essential for this project. A good eye for aesthetics and layout will be necessary. - Attention to Detail: Given the small volume of content, each element of the site must be carefully considered and replicated in the new design...

I'm looking to create a comprehensive database of self-managed home care providers in Queensland and Australia to facilitate networking within the industry. Key requirements: - The database should include the provider's: - Name - Address - Email - Prime contact Ideal skills for this project: - Proficiency in data collection and database creation - Familiarity with the home care industry in Queensland and Australia - Organizational skills, to categorize the data by region - Excellent attention to detail, ensuring accuracy in information provided The data should be organized by region for easier networking. I may also require the database to be updated periodically. The collected information should be reliable, up-to-date, and include a diver...

...expert who can help me with a data arrangement task. The task involves transferring sequences of cells data from one grouped workbook to multiple original workbooks and worksheets. The data transfer should be based on specific criteria. Key Requirements: - Data transfer based on a specific criteria: The macro should transfer data based on a specific criteria. This involves arranging the data from the grouped workbook into different cells in a column in the original workbooks based on predefined conditions. - Conditional Logic: The macro should include conditional logic. This means that the data transfer should not just be a simple copy-paste operation, but should involve logical conditions for accurate and efficient data arrangement. - Potential for automa...

I'm in need of a seasoned Mechanical Engineer with specific expertise in heat transfer, fluid dynamics, and thermodynamic cycle analysis to assist in the development of a revolutionary solar thermal engine patent prototype. Key Requirements: - Conducting in-depth thermodynamic cycle analysis for the solar thermal engine. - Designing the engine layout and key components to optimize its performance. - Understanding and managing the behaviors of steam vapor and condensate. - Proficiency in analyzing fluid flow, power, and pressure drop. - Knowledge of steam hammer and heat pipe behavior for this application. - Experience with developing engines within the 1-5 kW power output range is essential. Ideal Skills: - Proficiency in CAD software, such as SolidWorks. - Experi...

I am in need of someone who can help me gather email addresses, websites, and phone numbers from the links in the attached spreadsheet. It's crucial that the information you provide is accurate and up-to-date. The test of accuracy will be me sending emails and verifying the company. Any wrong details will need to be collected again unless it is beyond your control (e.g. company has closed down etc.) Automated collection will be erroneous as the data needs to be collected in the following way. use the company names or links from the attached spreadsheet. 2. To copy and paste the company name + UK in the Google search box. The company's operation must be based in the UK as similar names may exist in US as well. 3. Or to click company logo and collect its email addresses, websit...

I require professional assistance to transition the property deed, currently under an individual's name, to a trust. The property in question is a residential one in renton, wahsington state. - Transfer of Deed: Need to transfer residential property deed from an individual's name to a trust. - Deed expertise: Familiarity with property law, especially related to the transfer and change of deeds is crucial. The ideal applicant for this task would have a proven track record in handling such transitions with a deep understanding of the legal implications and process involved. Legal background and previous experience in real estate law are a must.

I have a project that entails exporting contacts from one database and merging them in a particular manner. Here's what I need: • Transferring data between databases -- changing to a new program • Combining the Excel rows into a single cell. Only the address, city, state, zip into one cell. Name, phone, email will stay separate. • The final format for the merged data should be in CSV. Ideal skills and experience required for this project include extensive knowledge about Excel functionalities, CSV formats, and database management. Previous experience with contact data transfer and merging will be highly appreciated. Let me know if you've done similar jobs in the past.

I need an expert in Ansys Fluent who can complete a heat transfer simulation setup within a one-day deadline. The specifics of the assignment are: - simulation - Heat transfer simulation with a focus on conduction - Post-processing analysis Freelancers should have a background in Ansys Fluent software and should be experienced in dealing with heat transfer simulations, The ability to adhere to strict deadlines is also crucial. Please place your bid if my project matches your skills and experience.

I'm seeking a professional capable of driving immediate revenue and setting up sustainable income streams for my e-commerce website. - Revenue Models: - I aim to create generational income, rather than focusing on one-time sales. Your task will be to: - Create and sell digital products - Build a loyal customer base for repeat purchases - Implement successful affiliate marketing programs - Expertise Required: - Proven experience in e-commerce revenue generation - Proficiency in setting up and managing digital product sales - Strong track record in customer retention strategies - Successful implementation of affiliate marketing schemes If you have the right skills to drive revenue and set up sustainable income streams, I'm excited to hear from you!

...insights and practical advice that this demographic can easily understand and implement. Key points you should cover in the blog post: - Tips for creating a budget: This section should provide practical and actionable advice on how families can set up and adhere to a budget. The guidance should be clear and easy to follow, helping readers to better manage their finances. - Strategies for saving money: The blog post should also outline various strategies families can use to save more effectively. This can range from cutting back on non-essential spending to setting up automatic savings plans. - Investment options for long-term financial planning: As the main topic is investing in stocks, the blog post should provide a comprehensive overview of different investment options avail...

I have a large batch of text data in PDF files that needs to be copied and pasted into a specific format. Key Requirements: - Transfer text data from various PDF files - Ensure accuracy and precision in the copying - The time-sensitive nature of the task - The data must be transferred into a format that is easy to work with Ideal Candidate: - Proficient in using PDF files - Strong attention to detail - Previous experience with data entry/copy-paste tasks - Ability to work under time constraints

I have a project that entails exporting contacts from one database and merging them in a particular manner. Here's what I need: • Transferring data between databases -- changing to a new program • Combining the Excel rows into a single cell. Only the address, city, state, zip into one cell. Name, phone, email will stay separate. • The final format for the merged data should be in CSV. Ideal skills and experience required for this project include extensive knowledge about Excel functionalities, CSV formats, and database management. Previous experience with contact data transfer and merging will be highly appreciated. Let me know if you've done similar jobs in the past.

...potential couriers from a database based on the transport's distance, size, and location. The logistician contacts these couriers via Outlook to inquire about availability and pricing. Selection and Confirmation: Upon receiving responses, the logistician selects the best courier based on price and availability. The logistician fills out an order form in Excel, converts it to PDF, and sends it to the chosen courier to confirm the shipment. Automate File Transfer Based on Client and Project: Implement a system that automatically transfers the transport query from one file to another in the local drive based on the client and the current project folders. Project Goals: Automate Courier Selection: Develop a way to automatically select suitable couriers from the dat...

...than someone experienced but is not very intelligent and/or does not solve problems scientifically. Would I hire an Isaac Newton or an Albert Einstein even if he had no programming experience? Of course I would. ✻ TESTS ✻ You must pass several difficult logic tests to work with me. The first logic test you complete for me will be an unpaid logic test. In other words, I would not pay you any money whatsoever if you were to pass the first logic test. However, I would pay you $25 (Twenty-Five Dollars) if you were to pass the second logic test, and $50 (Fifty Dollars) if you were to pass the third logic test. ✻ OBTAINING SUPPLIES ✻ I will send you approximately $50 (Fifty Dollars) so that you can purchase ESP32 development boards, breadboards, components (such as resistors, tr...

I'm in search of a talented tattoo artist who can create a unique blackwork tattoo design for me. NOTE: The design is to be based on an existing tattoo (photo is attached, must incorporate this tattoo), but expanded upon with a fresh blackwork twist. The placement is upper arm/shoulder area. The current tattoo is approx. 3 inches but I would like the new design to cover more area. The ideal candidate should be well-versed in tattoo design, particularly blackwork style. It's crucial that you've got a keen eye for incorporating sacred geometry and symbolism into your designs. Key Points: - Proficiency in blackwork tattoo style - Ability to artfully incorporate sacred geometry into the design - Understanding of creating symbolism in tattoo...

I need a proficient database developer (PHP Developer) to create a specialized system for my dental equipment repair company. The database will cater to a sizeable clientele of 5000 customers. The details to be incorporated include: * Equipment type (X-ray machines, Dental chairs, Autoclaves) * Maintenance history * Customer details (Clinic name, number, email address etc.) In order to succeed in this project, you should have: * Strong database creation skills with the ability to account for our unique needs * Experience in the healthcare sector, specifically knowledge of dental equipment * Excellent problem solving and critical thinking skills for effective database design * Understanding of confidentiality requirements given the sensitive nature of...

I'm looking to set up a platform where I can sell digital products. Key Requirements: - I'd like customers to be able to download their purchased products directly after they make a purchase. - The platform should support cryptocurrency payments for the purchases. Ideal Skills and Experience: - Experience in setting up online sales platforms, preferably for digital products. - Knowledge of cryptocurrency payment systems. - Understanding of user-friendly download processes for customers. Please let me know your experience in this area and how you would approach this project.

I'm looking for a skilled professional to transfer my existing funnel from Ready2Launch to a new platform Clixlo, they are both the same mainframe so it would be like pulling a funnel by the click of the link but all the automations is where I get lost., while keeping the same structure and design. Key requirements: - Migration of all existing components: Opt-in form, Sales page, Upsells, Email integrations - Design: Utilize a pre-designed template for the new platform Ideal candidates should have: - Experience in funnel migration, especially from Ready2Launch - Proficiency in the chosen platform for migration - Strong attention to detail to ensure all features are carried over correctly - Good understanding of design principles for creating attractive...

Seek...same application. The app will integrate with our existing Shopify website for seamless user experience and functionality. Consultation Scope: - Secure File Upload: Enabling users to upload audio files with embedded encrypted keys. - Encryption & Decryption: Implementing robust encryption methods to ensure the secure attachment of keys to audio files. - File Sharing Facilitating the secure transfer of files between users within the app. - **Bluetooth Key Sharing:** Allowing the encrypted key to be shared via Bluetooth between devices. - Cross-Platform Development: Ensuring compatibility and seamless functionality on both iOS and Android platforms. - **Integration with Shopify: Connecting the app with our existing Shopify website for user authentication and transacti...

We are seeking an experienced Flutter developer to integrate 's video and call streaming services along with Firebase database into our existing Flutter application. The primary tasks include implementing 's features for seamless video streaming and call functionality, as well as utilizing Firebase database for efficient data storage and retrieval. The ideal candidate should have prior experience with SDK and Firebase integration. Additionally, the developer will be responsible for updating the app to meet the requirements for submission to both Apple Store and Android Store. If you have the necessary skills and expertise in Flutter development, we'd love to hear from you.

We need the following combination of online database and data entry interface from users + a local MS access file. Online Database and web I terface for data entry We want to have multiple users to view and edit information for subscribers (names) in a database. Those users must be able to login on a web page, with a username and password. All users will see same information. But certain fields, those they will be able to edit, will be visible only to that specific user (and admin). Multiple users must be able to enter data (different) for each subscriber. User must be able to filter certain columns, search in all fields, hide/show columns. Online (on web) visible to users, will be only the fields mentioned in table visible) MS Access (local file) Administrator must...

I need a skilled developer to integrate our custom in-house software with Oracle TimeCard. This is to allow for automated time entry. Key Requirements: - The integration should allow for automatic time entry from our custom in-house software to Oracle TimeCard. - The system should also enable the creation, updating, and d...Oracle TimeCard. This is to allow for automated time entry. Key Requirements: - The integration should allow for automatic time entry from our custom in-house software to Oracle TimeCard. - The system should also enable the creation, updating, and deletion of timecard information in Oracle TimeCard. Ideal Skills: - Proficiency in Oracle TimeCard integration. - Experience with automated data transfer between systems. - Strong understanding of custom software in...

I am in need of a skilled professional who can assist me in se...enable the creation of goods and service invoices in USD. - Implement moderate customization to the invoice templates, focusing on layout changes and adding custom fields. - Import all of my product information from an Excel sheet. This includes product names and their respective cost prices (which are in INR). - Enable and Teach me to Use Odd's OCR feature to fetch pdf data from invoice to transfer it to software Ideal Candidate: - Proficient in working with Odoo Books and setting up invoicing processes. - Experience with customizing invoice templates within Odoo. - Skilled in data import from Excel sheets to Odoo. I look forward to working with a professional who can deliver these requirements effectively a...

I'm looking for an expert to create a web-based CRM database aimed at efficiently storing and managing information. The data I intend to keep include: - Customer contact details - Sales history - Communication logs - Course details - Course Refresher notifications This project also requires the creation of functionalities to: - Add new contacts - Update existing contact information - Track sales performance Ideal freelancers should have substantial experience in CRM database development, with knowledge of implementing web-based solutions. Familiarity with training or course-based entities would be a bonus. Your expertise ought to allow seamless additions, updates, and performance tracking of stored information. Demonstrable success in similar projects will be advanta...

Hi guys, Thanks for your interest in writing for us. IMPORTANT: Human writin...vocabulary are pluses. *Deadlines are very important and when given one you must make sure to submit the work in time. Please tell us about your availability in your proposal. *Naturally, all the content should be original. All the content must pass Copyscape. *By bidding on this project you understand that any writing work you'll do for us will be done on a pay-per-work basis, and that you transfer all the rights to the content you deliver upon delivery and will not publish the content anywhere, including online portfolios etc., or use it in any other way. We'll try promising applicants out with a paid test article. As such, please submit a proposal of $20. Thanks in advance for submi...

...engagement. The primary objective is to keep users engaged with the app and reward them for their time and effort. Key Features: - The app should allow users to earn money through completing simple surveys, watching ads, and trying new applications. - Users should be able to redeem their rewards in the form of gift cards. - The design should be simple and user-friendly, ensuring a seamless experience for the users. Skills and Experience: - Proven experience in Android app development, with a strong portfolio of successful apps. - Knowledge of integrating payment systems and managing user rewards in mobile applications. - Design skills that focus on user experience and engagement. - Prior experience with incentive-based apps or similar reward systems will be...

MAX BUDGET 45€ - No Dummy Offers . Please don't send me dummy offers just to make the initial Contact and then ask for more money. The Project: Develop the project in NodeRed Monitoring specific "HTML div elements" from different web pages using Node-Red (different flows). Objective: Identify when there is any change in the DIV section of the webpages (every "x" seconds) and notify me of the change. It is not necessary to show what the change was. Just send the hyperlink by Telegram, including the subject of the flow. Requirements: Create a Node-Red project that can detect changes on multiple websites by creating flows. Include 2 example flows to demonstrate how the monitoring works. Provide detailed instructions on how to create a new flow fo...

I'm in need of a skilled Python developer to assist in creating a client-server application. This application will be responsible for handling data transfer and supporting information about bus and train routes. Key Requirements: - Expertise in Python and Socket Programming - Experience in creating client-server applications - Ability to work with and manipulate data Your responsibilities will mainly revolve around setting up a robust client-server architecture to support bus and train route data. I already possess the data, so the primary task will be focused on the actual programming and integration of the application. Experience in working with transport data or similar datasets would be advantageous. I'm looking for a professional who can deliver a high-quality, ef...

I am in need of a document management software that will be compatible with Windows& Mac. This software is intended for use by business professionals, so it should be user-friendly, efficient, and secure. Key Features: - The software should include a document scanning feature, making it easier for users to transfer physical documents into the digital realm. - It should also offer a filing system that is organized and intuitive, ensuring that users can easily locate and retrieve the documents they need. I require a freelancer who has experience in developing document management software, particularly for Windows. The software should be designed to handle a large volume of documents while maintaining high performance. A strong understanding of cybersecurity and access contro...

I'm looking to test database scraping on a website to extract names and potentially contact emails (if available). The data doesn't necessarily need to be organized or cleaned post-extraction. Ideal Skills: - Proficiency in web scraping tools - Understanding of database structures - Familiarity with handling contact information The data should be organized in an excel and csv based on the desired layout.

...Ranking. I have also done some customizations and modifications to Rank Math for my SEO needs. The project involves transferring all the SEO configurations and customizations from Rank Math to Yoast Plugin without losing any data or affecting the site's SEO performance. Key requirements: - Full migration of Schema Markup, Sitemap Generation, and Keyword Ranking settings from Rank Math to Yoast. - Transfer of any other customizations made to Rank Math for SEO purposes. - Ensure that the site's SEO performance is not negatively impacted by the migration. Ideal Freelancer: - Proficient in WordPress, particularly with SEO plugins like Rank Math and Yoast. - Experienced in SEO migration and familiar with common data structures in SEO plugins. - Skilled in troubleshooting...

... The application will include popular games like slot machines, poker tables, and blackjack tables. A crucial aspect to mimic an authentic casino experience. Design-wise, I want the application to have a sleek, modern aesthetic. It needs to look cutting-edge and attractive to users. Key functionality includes: - User Account Management: Freelancers with experience in implementing features allowing users to create, manage their accounts are desired. - Cash/Token Management: The application will need a system to manage cash or tokens for the games. It requires a safe and secure system to ensure users can easily manage their money within app. Ideal candidates for this project will have experience developing similar gaming applications, particularly with React.js. Proven...

...achieve optimal functionality. While not necessary I will favor developers who have the hardware at hand and can test themselves before finalizing the project. Any prior experience in Embedded development, File transfer, Network communication would be an added bonus. Key objectives are as follows: - Establish Websocket connection to public domain - With Wiznet W5500 and STM32 microcontroller. The ideal candidate should have: - Proficiency in Wiznet development - Proficiency in STM32 development - Extensive experience with Ethernet connectivity - Understanding of data transfer speeds and protocols. - STM32 and W5500 modules at hand Your job will be to write an optimal code, preferably in STM32CUBEIDE or Keil MDK Arm. The Wiznet W5500 is connected to STM32 via SP...

I need an adept freelancer who is skilled at using to help me set up automatic transfer of data from our Airtable booking system to Sage Business Cloud to automate invoicing. The data in question includes booking details and invoicing line items. Most of the system is up and running but we are currently stuck sending the invoices line items correctly. A deep understanding of both Airtable and Sage Business Cloud will be highly beneficial for this project. Applicants with experience in similar projects have an added advantage. Efficiency, accuracy, and attention to detail are vital for this task.

I'm seeking a proficient Access Database designer to build an advanced and fully functional task management system. Key Features: - Data Entry Forms: These should be user-friendly and designed for efficiency. - Reporting and Analysis Tools: I need to be able to easily track productivity and analyze task-related metrics. - Data Validation Rules: The system needs to ensure the accuracy of inputted data with stringent validation rules. Structure: The database should consist of 5-10 interlinked tables for comprehensive task tracking and management. Ideal skills and experience for this job would include: - Extensive experience with Access database design, specifically around task management systems. - Strong ability to translate user needs into functional sy...

I'm seeking an experienced freelancer with strong attention to detail to perform data entry into my database. The data to be entered is text-based and extracted from various sources which may have distinct formats. Below are specifics about the job: - Handling Text Data: The job will entail entering a variety of text data into the designated database. - Format Diversity: The data comes from diverse sources, so it does not adhere to a specific format. The ideal candidate must be adaptable in handling different data formats. - Correcting Discrepancies: The freelancer will need to spot and correct discrepancies or inconsistencies within the data sources. Accuracy and keenness to details will be crucial. Ideal Skills: - Proficient in data entry - Strong attention to d...

I'm looking for a skilled professional to improve the accuracy of my cloud-based database. To achieve this, the tasks at hand include: - Identifying and removing duplicate entries - Standardizing data formats to ensure consistency - Conducting routine data cleaning checks to maintain accuracy Ideal candidates should have: - Proven experience in data cleaning and management - A deep understanding of cloud-based database systems - Strong communication skills as I prefer to get updates and progress reports through an instant messaging app.