John is the creator of a popular app BetterVision, for the blind and visually impaired. There is a good reason for the over 100K installations John’s creation has achieved. BetterVision can turn a phone’s camera into a powerful assistant easing a daily routine for disabled users worldwide. With success, however, soon came difficulties. John’s app suffered a cloning attack, and his In-App purchases got stolen.

Check this link:
https://medium.com/@talsec/5-things-john-learned-fighting-hackers-of-his-app-a-must-read-for-pms-and-ciso-s-463379b49410

Keep an eye on attack vectors with MobSF

Your shiny new Android app is almost done and you are heading for release. Your most valuable assets are baked inside your app, yet there is one last crucial measurement your app should undertake to ensure its security.