The minSdkVersion is 21, so the app won't work on android version < 5.
There was people complaining on the app won't work on older devices (heard at news), what the reason it's set for 21?
From react-native documentation:
https://github.com/facebook/react-native#-requirements
React Native apps may target iOS 10.0 and Android 4.1 (API 16) or newer.
Which component / tasks require the increased minSdkVersion?
The minSdkVersion is 21, so the app won't work on android version < 5. There was people complaining on the app won't work on older devices (heard at news), what the reason it's set for 21? From react-native documentation: https://github.com/facebook/react-native#-requirements
Which component / tasks require the increased minSdkVersion?
See https://github.com/MohGovIL/hamagen-react-native/issues/281#issuecomment-672835389 for news mention: "היישומון אינו נתמך במכשירים ישנים"