--- title: "21 Trainer - Reviews, Revenue and Downloads in Belarus | Apple App Store" description: "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 dril" --- # 21 Trainer — Belarus > Blackjack Counting Coach ![21 Trainer App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple221/v4/ea/d5/14/ead51445-900c-8c76-f53a-c92997888dec/AppIcon-0-0-1x_U007emarketing-0-6-0-85-220.png/434x0w.png) **Developer:** [Jan Haider](https://apptail.io/developer/jan-haider-wCrvc) **Category:** Games **Rating:** N/A (0 ratings) **Price:** Free **Bundle ID:** JLH.blackJack-Trainer **Store:** Apple App Store **Country:** Belarus **Version:** 1.0 (released 2025-12-29) **Original Release:** 2025-12-29 **Languages:** English, German **App Store Link:** [Download on Apple App Store](https://apps.apple.com/by/app/app/id6756545201) **AppTail Page:** [https://apptail.io/app/21-trainer-YcZx/belarus](https://apptail.io/app/21-trainer-YcZx/belarus) ## 21 Trainer Description 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. ## 21 Trainer Screenshots - [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/bd/59/41/bd59415b-286f-3e0d-809c-6f4e057371cd/C3DCED8B-8C3A-4FAA-9068-0DBEF4FC1F07-canvas-1.png/1284x2778.png) - [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/55/48/16/5548166d-7018-2696-5ec1-26fb1553fb27/97FEBD2C-D4F3-4A28-A64A-E7D63FBBA801-canvas-2.png/1284x2778.png) - [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/c2/63/0c/c2630cf1-38ac-3fc7-5083-87d4339e04ea/43513433-5051-467F-A23B-88FAE2DB852D-canvas-3.png/1284x2778.png) - [Screenshot 4](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/fc/aa/7c/fcaa7c7c-a4aa-1e8e-f63d-0adf96fcd78a/23239BCB-048A-4D34-8D6A-02B2A55E4ED2-canvas-4.png/1284x2778.png) ## 21 Trainer Available In - [Belarus](https://apptail.io/app/21-trainer-YcZx/belarus) - [Germany](https://apptail.io/app/21-trainer-YcZx/germany) - [United Kingdom](https://apptail.io/app/21-trainer-YcZx/united-kingdom) - [South Korea](https://apptail.io/app/21-trainer-YcZx/south-korea) --- ## About AppTail [AppTail](https://apptail.io) is a mobile app intelligence platform providing app analytics, ASO (App Store Optimization) tools, keyword tracking, competitor analysis, revenue estimates, and review monitoring for iOS App Store apps. Track your app's performance, discover ranking keywords, monitor competitors, and analyze market trends. - [Search Apps](https://apptail.io) - [Top Charts](https://apptail.io/top-iphone-apps) - [Sign Up for Full Access](https://app.apptail.io/signup?utm_campaign=ai-crawl&utm_content=footer) *Data provided by [AppTail](https://apptail.io) - Mobile App Intelligence Platform*