Chess Clock vs Blunder
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Chess Clock
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Chess Clock is a distraction-free dual timer for over-the-board games. Pick a time control, tap your side after each move — that's it. Works fully offline, no account needed. Free presets play a complete game; Chess Clock Pro unlocks custom time controls, extra presets, and themes. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Blunder
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Take a photo, open it in Blunder, and start exploring a chess position. Super fast! Blunder turns photos and screenshots of chessboards into interactive positions, with quick access to the camera and your photo library. FROM PHOTO TO POSITION - Recognize boards in screenshots and photos, including photos taken at an angle. - Automatically detect the board orientation. - Infer whose turn it is from highlighted last-move squares when available, or change the side to move yourself. EXPLORE THE BEST MOVES - View Stockfish analysis powered by Lichess. - Choose how many alternative lines to show. - Tap moves in a line to explore the continuation. - Choose an analysis time and available engine options. - Switch between the Blunder analysis view and the Lichess view. BUILD YOUR CHESS LIBRARY - Revisit recent games in a visual board gallery. - Save favorites and organize positions into folders. - Sync your library with iCloud across iPhone and iPad. - Turn off automatic history while keeping your favorites and organized games. SHARE AND CONTINUE Share positions as FEN, or open them in Lichess or Chess.com. Blunder requires iOS 26 or later. Internet access is required for Lichess analysis. Recognition results can vary with image quality and board design. BLUNDER PRO Your first 20 scans are free. Blunder Pro unlocks unlimited scans with a monthly or yearly subscription, or a one-time lifetime purchase. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the period. Manage or cancel them in your App Store account settings. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://lucas.io/privacy
Screenshots
Verdict
The clearest difference is update cadence: Blunder at every 3 days against Chess Clock's fortnightly. On price, ads, in-app purchases 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
Both are free to download. Chess Clock sells 3 in-app purchases, starting at $1.99 per month and Blunder sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
Chess Clock ships an update fortnightly, Blunder every 3 days. The most recent releases landed on November 9, 2026 and November 10, 2026 respectively.
| Parameter | Chess Clock | Blunder |
|---|---|---|
| Price | Free | Free |
| Update frequency | Fortnightly | Every 3 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 26.1 | 26.0 — better |
| Further details — not scored | ||
| Size | 18 MB | 21 MB |
| Age rating | 4+ | 4+ |
| Developer | Naveen Mathivanan | Lucas Raggers |
In-app purchases
Chess Clock
- Chess Clock Pro Monthly$1.991 Month
- Chess Clock Pro Annual3 Days trial$9.991 Year
- Chess Clock Pro Lifetime$14.99
Blunder
- Lifetime$4.99
