21 Trainer is made and published by Jan Haider. AppBrain is an independent app data site and isn't affiliated with Jan Haider. The app name, icon, screenshots and description belong to Jan Haider and are shown as published on the App Store.
AppBrain's verdict
- Last updated
- December 29, 2025
- Size
- 4.48 MB
User feedback
Ratings and reviews on the App StoreComments on 21 Trainer for iOS
We don't have enough comments to show example comments. Please check back later.
Store listing
By Jan Haider, from the App Store
Description by Jan Haider Written by the developer, not by AppBrain. Click to read.
Hi-Lo counting system. Play hands in a clean table view, then switch to dedicated training and
quick drills to build speed and accuracy.
Features:
- Play mode to practice real decision flow hand by hand.
- Training mode for running and true count practice with optional quizzes.
- Quick Drills with adjustable duration, auto-advance pace, mid-quizzes, and a final check.
- Detailed statistics across play, training, and drills: hands played, win rate, counting
accuracy, and decision time.
- Customization for decks, themes, card styles, and quiz options.
Whether you are new to counting or polishing your skills, 21 Trainer helps you practice
deliberately and track your progress over time.
Safety and technology
Found in the app by AppBrain- Price
- Free
- App size
- 4.48 MB
- Content rating
- Everyone
Technologies used by 21 Trainer
Releases
Updates seen on the App Store- Version
- 1.0
- Launched
- December 2025
No changelog data
Alternatives
Similar apps and more from Jan HaiderAlternatives to 21 Trainer
More from Jan Haider
Rankings
App Store top chartsApp Store Rankings for 21 Trainer
About the app and developer
About 21 Trainer
21 Trainer is a games app developed by Jan Haider.
User Ratings
The app has no ratings yet.
App Information
21 Trainer is freely available from the App Store. The app size is 4.48 MB. The latest version available is 1.0. The last update was on December 29, 2025.
Technical Requirements
The app has a content rating of Everyone. The app has been available on the App Store since December 2025.
Developer information for Jan Haider
Address: