So this is a good app for mobile ( android ) MODs
Download → https://www.happymod.com/
It’s quite reliable and safe , but ads are cancerous
But guess what
Your brother knows how to block those ads
That is blokada ( the best free adblocking app )
Download → https://blokada.org/
Personally on my mobile I use both of them for downloading cracked apps and blocking ads . That’s all .