Hi, there. I read your description and I know what you want exactly. I'm a senior mobile app developer, I'm very interested in your project. I've developed many apps, I have lots of experience and knowledge in Android/ios App Development. If you want, I will implement your requirements quickly.
My skill set: Flutter, React Native, Ionoc, Android studio.
design: Software architecture, Graphics design, Website design, Illustrator, Photoshop.
front-end: Objective C (for iOS apps), Java (Android apps), HTML / JavaScript / CSS (browser-based)
back-end: Java, PHP, .net, JavaScript.
database: MySQL, SQl.