Comparison

Sudoku # vs 7Sec Chess

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

Head to head
About

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.

Highlights
  • AI-designed Sudoku levels
  • Brain, memory, and logic training
  • 5 difficulty options
  • Thousands of levels
  • Human-solvable board filtering
Read full description

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

About

7Sec Chess

Features
Read full description

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

Sudoku #4 screens
7Sec Chess4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Sudoku # ships an update every 3 weeks, 7Sec Chess weekly. The most recent releases landed on September 19, 2026 and May 18, 2026 respectively.

Scorecard1 real difference · 9 level
Sudoku # versus 7Sec Chess: the parameters behind the verdict, then further details
ParameterSudoku #7Sec Chess
PriceFreeFree
Rating4.7 (324 ratings) — better—
Positive reviews79.3% of reviews—
Number of ratings324 — better—
Update frequencyEvery 3 weeksWeekly — better
AdsYesYes
In-app purchasesNoNo
MonetizationAd-supported—
DevicesiPhone, iPadiPhone, iPod
Requires iOS16.015.0 — better
Further details — not scored
Size142 MB120 MB
Age rating4+4+
DeveloperJinyang TangSalih Eksioglu

In-app purchases

None

Sudoku #

No in-app purchases

None

7Sec Chess

No in-app purchases

Questions

Is Sudoku # free?
Sudoku # is free to download, with no in-app purchases.
Is 7Sec Chess free?
7Sec Chess is free to download, with no in-app purchases.
Do Sudoku # or 7Sec Chess have ads?
Both Sudoku # and 7Sec Chess show ads.
Which is updated more often, Sudoku # or 7Sec Chess?
Sudoku # ships an update every 3 weeks, and 7Sec Chess weekly. Most recently, Sudoku # was updated on September 19, 2026 and 7Sec Chess on May 18, 2026.

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