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

I have tried to design a nonobtrusive timer app named Focus, check it out. I don’t intend to continue its development since there is no need for another Pomodoro app. The main (and only) specialty of the Focus is a text field used to specify a current goal.

Play Store? Huawei AppGallery? Custom updater?

This article aims to answer common questions about the possibilities of android app distribution. I try to compare various ways of installation which can be interesting for non-public apps. I also examine relevant app stores to summarize their possibilities and limitations. The monetization, advertisement, and related business aspects are taken just briefly. Beware - the market situation is taken from the US/EU viewpoint. The regional situation in Russia, China, or India is beyond my knowledge.