Accepted answer
Short answer: Check source, permissions, file name, version and Android warnings before installing.
How I check this as a player
I treat an APK like a file from outside the store: verify first, install later.
What it changes at the table
The safer path is to understand what the app is asking for.
Safety note
This site is an independent 3Patti guide. I use these answers for learning rules, comparing app claims and spotting risky wording; we do not operate real-money games, process payments, or guarantee APK safety, winnings, withdrawals or bonuses.