Comparison

Blunderzone vs Stockfish Chess Analysis

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

Head to head
About

Blunderzone

Features
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Turn your chess mistakes into focused practice with Blunderzone. Connect Lichess or Chess.com, review your games, and train the positions where you missed a better move. โ€ข Game Tactics: puzzles from your own games. โ€ข Quick Tactics: short sessions of 10 puzzles. โ€ข Memory Training: revisit positions with spaced repetition. โ€ข AI explanations: understand mistakes and better continuations in your account language. โ€ข Track your progress, training streaks and game statistics. โ€ข Optional reminders help you keep a training routine. Choose from 20 interface languages. Free, Basic and Premium plans offer different game import, analysis and AI explanation allowances. Paid memberships are optional; prices are shown in the app before purchase. โ€ข 20 AI explanations / 100 AI explanations. One-time purchase. Credits never expire and are shared across your devices. One credit unlocks one new explanation. Privacy Policy: https://blunder.zone/privacy-policy.html Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Stockfish Chess Analysis

Features
Read full description

Play chess, analyse your positions, solve puzzles, and improve your skills, all in one app. SCG brings chess analysis, gameplay, daily puzzles, lessons, and position setup in a simple and focused experience. Whether you want to play a quick game, do analysis, or sharpen your tactics, SCG has you covered! Key Features: โ†’ Chess Analysis: Analyse positions with engine evaluations and understand your games more deeply. โ†’ Play Chess: Challenge the computer, play with a friend, or create a private room to play online. โ†’ Difficulty Selection: Adjust the opponent's strength and choose a level that matches your skills. โ†’ Custom Position Setup: Build any chess position on the board, then analyse it or start playing directly. โ†’ Daily Puzzles: Solve daily challenges and puzzles to practise calculation and tactical thinking. โ†’ Learn Chess: Follow interactive lessons on how the pieces move and understand the fundamentals. โ†’ Hints & Undo: Get a hint when you need help or undo moves while practising and exploring. โ†’ Board Customization: Personalize your experience with different board styles, piece sets, and more. โ†’ 2D & 3D Boards: Play on a traditional 2D chessboard or switch to an immersive 3D board. โ†’ Customizable Experience: Enable or disable music, sound, and haptics to match your preferences. Download SCG now and make every move an opportunity to improve! About Subscription: The free version of SCG offers limited access. A Pro subscription unlocks all features, customization, and full app experience. Privacy Policy: https://game-q.top/privacy-policy/ Terms of Use: https://game-q.top/terms-conditions/ Support: https://game-q.top/support/

Screenshots

Blunderzone4 screens
Stockfish Chess Analysis4 screens

Verdict

The call

The clearest difference is ads: Blunderzone at none against Stockfish Chess Analysis's shown. Blunderzone also leads on update cadence (weekly vs every 2 weeks) and iOS requirement (15.0 vs 17.0). On price, in-app purchases and device support there is nothing between them.

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

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Blunderzone sells 4 in-app purchases, starting at $3.99 per month and Stockfish Chess Analysis sells 3 in-app purchases, starting at $3.99 per 7 days. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Blunderzone ships an update weekly, Stockfish Chess Analysis every 2 weeks. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.

Scorecard3 real differences ยท 3 level
Blunderzone versus Stockfish Chess Analysis: the parameters behind the verdict, then further details
ParameterBlunderzoneStockfish Chess Analysis
PriceFreeFree
Update frequencyWeekly โ€” betterEvery 2 weeks
AdsNo โ€” betterYes
In-app purchasesYesYes
DevicesiPhone, iPad, iPod โ€” betteriPhone, iPad
Requires iOS15.0 โ€” better17.0
Further details โ€” not scored
Size187 MB20 MB
Age rating4+4+
DeveloperRANKA s.r.o.Nikita Bohara

In-app purchases

4 purchases

Blunderzone

Subscriptions2
  • Blunderzone Basic$3.991 Month
  • Blunderzone Premium$6.991 Month
One-time2
  • 20 AI explanations$4.00
  • 100 AI explanations$18.00
3 purchases

Stockfish Chess Analysis

Subscriptions2
  • SCG Pro Weekly Subscription$3.997 Days
  • SCG Pro Yearly Subscription7 Days trial$19.991 Year
One-time1
  • SCG Pro Lifetime GiftPlan$9.99

Questions

Is Blunderzone free?
Blunderzone is free to download, with in-app purchases available.
Is Stockfish Chess Analysis free?
Stockfish Chess Analysis is free to download, with in-app purchases available.
Do Blunderzone or Stockfish Chess Analysis have ads?
Stockfish Chess Analysis shows ads; Blunderzone does not.
Which is updated more often, Blunderzone or Stockfish Chess Analysis?
Blunderzone ships an update weekly, and Stockfish Chess Analysis every 2 weeks. Most recently, Blunderzone was updated on November 5, 2026 and Stockfish Chess Analysis on October 31, 2026.

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