Chess vs Dr. Unblock
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Chess
Engage in the classic game of chess with customizable graphics and multiple difficulty levels. Play against AI or a friend, with features like move undo, hints, and time controls. Enjoy a rich chess experience with detailed game history and board customization.
- HD graphics
- 5 difficulty levels
- Hint option
- Play against computer or friend
- 2D and 3D themes
- Unlimited undo moves
- Time control options
Read full descriptionHide full description
Chess is #1 popular game in the world. According to FIDE, about 600 million people play chess and it is the most widespread game on the planet. "The Game of Chess is not merely an idle amusement; several very valuable qualities of the mind, useful in the course of human life, are to be acquired and strengthened by it, so as to become habits ready on all occasions..." (Benjamin Franklin, scientist) Game features: - HD graphics for iPhone 5 and the new iPad retina display - 5 levels of difficulty - hint option to find out the best next move - play either white or black - play against the computer or a friend - 2D and 3D themes for chess pieces - unlimited ability to undo moves - AI quick response time - time control (5, 15, 30 or 60 minutes) - animated moves - highlight legal moves - easy to use interface design - ability to go back to any previous position in the game - auto-save when exit or phone ring - view captured pieces - full game history with chess notation - change the appearance of the board - ability to listen music in background Play one of the oldest and most enjoyable games in the world!
Dr. Unblock
Slide wooden blocks to free the red block in this addictive puzzle game. It offers a simple yet challenging experience for players of all ages. Test your logic and problem-solving skills.
- Sliding block puzzles
- Addictive gameplay
- Logic challenges
- Simple controls
- Unblock the red block
Read full descriptionHide full description
Dr. Unblock is a simple and addictive puzzle game. Unblock the red block out of the board by sliding the other blocks out of the way. SUD Inc.
Screenshots
Verdict
The clearest difference is review sentiment: Chess at 70% against Dr. Unblock's 0%. Chess also leads on rating (4.7 vs 2.0) and ads (none vs shown). Dr. Unblock's advantage is in-app purchases (none vs 4). On price, device support and iOS requirement 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 sells 4 one-off in-app purchases. Dr. Unblock asks for nothing beyond the download.
Chess holds the better App Store score, 4.7 against 2.0. That said, the two scores are not equally well evidenced: Chess has 39K ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 70% of Chess's written reviews are positive against 0% of Dr. Unblock's.
Chess ships an update every 6 weeks, Dr. Unblock every 6 months. The most recent releases landed on October 26, 2026 and October 24, 2026 respectively.
| Parameter | Chess | Dr. Unblock |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (39K ratings) — better | 2.0 (1 ratings) |
| Positive reviews | 70.2% of reviews — better | 0.0% of reviews |
| Number of ratings | 39K — better | 1 |
| Update frequency | Every 6 weeks — better | Every 6 months |
| Ads | No — better | Yes |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Ad-supported — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.4 | 12.0 — better |
| Further details — not scored | ||
| Size | 65 MB | 21 MB |
| Age rating | 4+ | 4+ |
| Developer | Vintolo Ltd | SUD Inc. |
Customer experience
Chess
Dr. Unblock
Bugs and requests
Chess
Reported bugs
3 issues- Incorrect stalemate detection
- Pieces disappearing or moving incorrectly
- Compatibility issues on older devices
Requested features
5 requests- Ability to replay puzzles
- Undo/redo move functionality
- Online/multiplayer mode
- More advanced AI difficulty
- Improved stalemate detection
Dr. Unblock
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Chess
- 10 hints$4.99
- 45 hints$19.99
- 125 hints$49.99
Show 1 moreShow fewer
- 200 hints$69.99
Dr. Unblock
No in-app purchases
