Logical Brain
Skills app is a very impressive brain game where you can improve your memory
It is free, it is addictive and you have a lot of tests to do.
You're not only improving your memory, but you're also improving your skills and speed.
The only consequence I could say is that the ads is annoying as on every other game.
Let me know if you know any other cons, Thank you for your valuable support.
https://play.google.com/store/apps/details?id=net.rention.mind.skillz
Hunter: 
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