Bubble is a no code required app creator. The service allows you to create a mobile or web app using a drag and drop editor. The app can be published with one click and Bubble covers all the behind the scenes backend of the app. The app can feature transactions, subscriptions, and process payments. You app can connect to social media networks to authenticate the user.
Bubble is free to build an app and charges only when you publish your app to the market.
Check out Bubble HERE