I need a mobile app developer to develop a plugin to an existing app.

General information for the app: Users can add a hair trend (this function is already available in the app and does not need to be developed) Kind of development: Customization of existing app Num. of web pages/modules: 1 Description of requirements/features: We have an existing app as follows: https://play.google.com/store/apps/details?id=com.increibleapps.app_105103_111166&hl=en https://itunes.apple.com/za/app/black-hair-beauty-network/id1231527612?mt=8 App users are currently able to add a hair trend and also leave a comment on a category of trends. Please see the app. We require a plugin for both Android and IOS that can facilitate the following: RestB Service – Subscription verification The backend subscription verification portal is a restful service for checking user current subscription. · URI endpoint: http://139.162.197.108/mtnpromo/rest-api/auth-code/ · Required parameters: phone, code, type § Phone: e.g. xxxxxxxxx § Code: xxxxxxxxx § Type: APP · Result: a JSONP value pairs format. § { "result": true } § { "result": false } · True: code has been verified and user still an active subscriber · False: code has been verified but the user is no longer a subscriber Specification design flow required o First-time login access should have 2 inputs: § Phone number § Access Code (Optional on first time login) Save and store the phone number and the access-code if provided. The access-code will be provided if the user request a subscription by dialing a specific number or sending a text to a specific number (already active). The app is opened to anyone to upload pictures but voting and comments only to subscribed users. o In order to view a Trend in the app, users need to have a running subscription. § Before giving access to that category, the app has to send a request to Backend restful service to check users’ current subscription. Check endpoint requirement. § If no access code is stored. Prompt the user to dial a supplied number or Send a text to a supplied number. The user will receive an access code via SMS. The prompt page should also have an input for the user to enter the access code. Once entered, it should be saved within the app.