# 21 Trainer — Blackjack Counting Coach

> Blackjack Counting Coach (iPhone/iPad app by Jan Haider.)

- Source: https://appshunter.io/ios/app/21-trainer/id6756545201 (this page in markdown: same URL + `.md`)
- Developer: [Jan Haider](https://appshunter.io/developer/1793934579)
- Category: Games, Education, Card, Strategy
- Price: Free
- Age rating: 4+
- Requires: iOS 26.0 · 4 MB
- Languages: American English, German (Germany)
- Released: 2025-12-29
- Data updated: 2026-08-27
- User reviews in markdown: https://appshunter.io/ios/app/21-trainer/id6756545201/reviews.md

## What is 21 Trainer?

21 Trainer is a focused practice app for learning blackjack fundamentals and mastering the
  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.


## Version history (last 1 release)

### 1.0 — 2025-12-29

No release notes.

## More apps by Jan Haider

- [Clean my Gallery](https://appshunter.io/ios/app/clean-my-gallery/id6741366946)

All apps by Jan Haider: https://appshunter.io/developer/1793934579

## Related topics

[blackjack apprenticeship trainer](https://appshunter.io/ios/topics/blackjack-apprenticeship-trainer)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-27.*