Most mobile apps these days have some kind of Twitter integration. The less the app can do on behalf of an user, the simpler this integration is.
Mobile apps that want to post tweets need to be registered on Twitter and cleared by their API team. Here’s how.
Step 1: Where?
Go to Twitter developers, sign in with the Twitter account that will be linked to your app, and click on Register an app.
Tip: The Twitter account that you use will not be visibile to your app users unless you want to. Avoid personal accounts as the app developers might need to have access to this account if things don’t work.