Sudoku # vs 7Sec Chess
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Sudoku #
This classic Sudoku game offers a unique and fun experience with levels designed by AI and machine learning. It helps exercise your brain, memory, and logic skills with five difficulty options and numerous levels.
- AI-designed Sudoku levels
- Brain, memory, and logic training
- 5 difficulty options
- Thousands of levels
- Human-solvable board filtering
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Classic Sudoku game, redefined by A.I. Our Sudoku is one of its own kind in the market. We use AI and Machine Learning to design the levels that bring a unique and fun experience to everyone. - Exercise your brain, memory and logic reasoning skills - 5 difficulty options, tons of levels, tons of fun - Levels designed by AI and Machine Learning *How to play* Fill the 9x9 board so that each row, column and 3x3 box contains all digits from 1 to 9. *Designed by AI* 1. Randomly generate 35,000+ valid board configurations for each difficulty levels 2. Classify “human solvable” boards using non-brute-force algorithms implemented using TensorFlow 3. These algorithms uses the same techniques as human solvers do, to filter out boards almost unsolvable by human 4. Less than 4% of these initial boards passed our AI test 5. Finally we validate the filtered sample with human testing to ensure board quality
7Sec Chess
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Get ready for the most intense chess experience ever! In 7Sec Chess, every move must be made within 7 seconds — test your focus, speed, and strategy like never before. Play online with real players or offline against AI, and prove your mastery in lightning-fast matches! Features: • Classic chess with a 7-second move timer • 20.000+ more Mate in One Move Challenges • Online multiplayer with ranked matches • Real-time check and checkmate animations • Smooth, modern board design with realistic pieces • Local statistics tracking (Wins, Losses, Streaks, Win %) Can you stay calm when the clock is ticking? Challenge your mind and climb the ranks to become the fastest chess master!
Screenshots
Verdict
The clearest difference is update cadence: 7Sec Chess at weekly against Sudoku #'s every 3 weeks. 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. Neither carries in-app purchases, so what you see is what you pay.
Sudoku # ships an update every 3 weeks, 7Sec Chess weekly. The most recent releases landed on September 19, 2026 and May 18, 2026 respectively.
| Parameter | Sudoku # | 7Sec Chess |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (324 ratings) — better | — |
| Positive reviews | 79.3% of reviews | — |
| Number of ratings | 324 — better | — |
| Update frequency | Every 3 weeks | Weekly — better |
| Ads | Yes | Yes |
| In-app purchases | No | No |
| Monetization | Ad-supported | — |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 16.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 142 MB | 120 MB |
| Age rating | 4+ | 4+ |
| Developer | Jinyang Tang | Salih Eksioglu |
In-app purchases
Sudoku #
No in-app purchases
7Sec Chess
No in-app purchases









