Mobile development

I need an iPhone/iPad app. I would like it designed and built. I am looking to build a two way application (e.g., customer and business login) which allows a customer to log into a diary data in a standardized template to be verified and confirmed by a business user. Confirmation and verification to be done via business’s app or website either using bar codes or something unique like that. Other features of app to allow business to list items which customers once find that business in the customer app will receive the list of items unique to that business to choose from. This list will be one input field in the standardized template. Another feature is the ability to confirm and verify offline between customer and business app via bluetooth or personal wifi. Another feature would be to allow instagram like photo sharing between users either business or customer and allow followers. Another feature would allow for app to store a centralized database of products so both business and customers can use in diary page. The product database should allow for uploading of image and label. In the diary page users are allowed to select more than one product and will appear on page like a sticker. App should be design to maximize user experience and be intuitive. The sign up pages should be simple asking for email and one or two personal details. App to be integrated with Apple’s DNA (i.e, faceid and finger print id). Looking for proof of concept.