# 21 Trainer

> Blackjack Counting Coach

Canonical page: [https://chrome-stats.com/d/id6756545201](https://chrome-stats.com/d/id6756545201)

## Overview

- **ID:** `id6756545201`
- **Platform:** Apple
- **Type:** Apple app
- **Status:** Available
- **Publisher:** Jan Haider
- **Category:** Strategy
- **Version:** 1.0
- **Last updated:** 2025-12-29
- **First published:** 2025-12-29
- **Size:** 4.48 MB
- **Data as of:** 2026-09-23
- **Store listing:** [Apple App Store](https://apps.apple.com/us/app/21-trainer/id6756545201)
- **Website:** [https://21trainer.jan-haider.dev](https://21trainer.jan-haider.dev/)
- **Privacy policy:** [https://21trainer.jan-haider.dev/privacy-policy.html](https://21trainer.jan-haider.dev/privacy-policy.html)

## Description

21 Trainer: play hands, master Hi-Lo counting, run quick drills, and track detailed stats for speed and accuracy.

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.

## Rankings

- #2,240,978 — Overall

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Source: [Chrome-Stats](https://chrome-stats.com/d/id6756545201)