Built a Texas Hold'em Preflop Trainer. Looking for some honest feedback! (Android)

Hi everyone,

As an indie developer and a poker enthusiast, I wanted to build something practical to work on my preflop game outside the tables. That's how Holdem Doctor was born.

To make the grind a bit more fun than just clicking static charts, I implemented two main features:

Classic Quiz: Standard preflop scenarios to test your ranges.

Time Attack Mode: A fast-paced mode where you have to make quick decisions under pressure (simulating real multi-tabling clock stress).

Preflop Charts: Easily accessible ranges to study and memorize.

The app is completely free on Android. Since it’s a fresh release, I would absolutely love to get some honest feedback from you guys regarding the interface, logic, or anything that could be improved.

Also, if you happen to enjoy it, leaving a rating on Google Play would mean the world to me (and might convince the Google algorithm that I actually exist >.<).
My target are rather ppl starting travel with holdem - I know there is a lot more advanced apps but here I focused on basics.

Here is the link:
https://play.google.com/store/apps/detai...

Thanks a lot for your time and good luck at the tables!

Some screenshots: