Comparison

Blindfold Chess vs 21 Trainer

Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.

Head to head
About

Blindfold Chess

Sharpen your chess visualization and strategy skills with this app. It offers structured lessons, challenges against an engine, and helps you master chess notation without seeing the board.

Highlights
  • Boost visualization skills
  • Play against a chess engine
  • Structured step-by-step lessons
  • Maintain learning streaks
  • Refine notation skills
  • Visualize the board without seeing pieces
Features
Read full description

Master the Art of Chess with Blindfold Chess! Elevate your chess game to new heights with Blindfold Chess, the ultimate tool to sharpen your visualization skills and challenge your mind. Whether you're a beginner or a seasoned player, Blindfold Chess offers a unique and immersive experience that will transform the way you approach the game of chess. Why Blindfold Chess? Boost Your Visualization Skills: Dive into a series of expertly crafted chapters designed to train your brain to visualize the board, even without seeing the pieces. Enhance your memory and improve your overall chess strategy by mastering the art of playing blindfold. Play Against the Engine: Put your skills to the test by playing against a powerful chess engine. With every move, you'll strengthen your ability to think ahead and anticipate your opponent's strategy—without ever seeing the board! Structured Lessons: Follow our step-by-step lessons that guide you through the fundamentals of blindfold chess. Each chapter is designed to build on the last, ensuring a smooth and effective learning curve. Maintain Your Streaks: Stay motivated and accountable with our streak system. Track your progress as you complete lessons and play matches, and challenge yourself to keep the streak alive! Refine Your Notation Skills: Practice playing via notation, a critical skill for any serious chess player. Our app helps you learn and memorize notations effortlessly, making your blindfold play smoother and more intuitive. Are you ready to take your chess skills to the next level? Download Blindfold Chess now and start your journey towards mastering one of the most challenging aspects of chess!

About

21 Trainer

Read full 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.

Screenshots

Blindfold Chess4 screens
21 Trainer4 screens

Verdict

The call

The clearest difference is in-app purchases: 21 Trainer at none against Blindfold Chess's 5. 21 Trainer also leads on ads (none vs shown). Blindfold Chess's advantage is iOS requirement (17.0 vs 26.0). On price and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Blindfold Chess sells 5 one-off in-app purchases. 21 Trainer asks for nothing beyond the download.

Scorecard3 real differences · 7 level
Blindfold Chess versus 21 Trainer: the parameters behind the verdict, then further details
ParameterBlindfold Chess21 Trainer
PriceFreeFree
Rating4.3 (28 ratings) — better—
Positive reviews57.1% of reviews—
Number of ratings28 — better—
Update frequencyEvery 2 months—
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad — betteriPhone
Requires iOS17.0 — better26.0
Further details — not scored
Size140 MB4 MB
Age rating4+4+
DeveloperRomir PatneyJan Haider

In-app purchases

5 purchases

Blindfold Chess

One-time5
  • Remove Ads$2.99
  • Lessons 4, 5, 6$3.99
  • Lessons 2 & 3$3.99
Show 2 more
  • Lesson 7$3.99
  • Everything Bundle$6.99
None

21 Trainer

No in-app purchases

Questions

Is Blindfold Chess free?
Blindfold Chess is free to download, with in-app purchases available.
Is 21 Trainer free?
21 Trainer is free to download, with no in-app purchases.
Do Blindfold Chess or 21 Trainer have ads?
Blindfold Chess shows ads; 21 Trainer does not.

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