➗ Math apps and platforms · 🎮 Learning games and sites
Sudoku.com
By Easybrain Ltd (Cyprus). Visit Sudoku.com
Desk research from the maker's own pages. Not yet tried by us. Checked 2026-10-24.
A popular free Sudoku game on the web and phones. Players fill a 9x9 grid so each row, column and box holds the numbers 1-9, at levels from Easy to Extreme, plus Killer Sudoku, daily challenges, tournaments and award badges. It offers hints, notes and mistake checking, and has rules and tips pages for beginners. Good logic practice for older kids and teens, but it is a general-audience game paid for by ads.
Our take: A fine logic game for teens and adults; for younger children, a parent should buy the no-ads version or pick a kids' puzzle app.
Checked in a browser
A browser check on 2026-10-25: what loads, the ads and trackers we saw, and what a child meets first. Not a hands-on test.
| Child safety: 2 out of 5 | Programmatic ads ran on the first visit (10 ad frames, including a Google video-ad player), so ads not chosen for children can appear. |
|---|---|
| Data: 1 out of 5 | The first visit contacted 30 known ad networks and 15 trackers, including ID-sync and data services (id5-sync, rlcdn/LiveRamp, tapad, eyeota, crwdcntrl, agkn, liadm), before any consent. |
| Ease: 3 out of 5 | The game itself is simple, but a consent banner covers the bottom third of the phone screen and ads compete for space. |
| Cost honesty: 5 out of 5 | No upgrade or pay prompts were seen on the web page. |
What we found
- 184 third-party sites contacted on one page load
- 30 known ad networks and 15 trackers, including 8 ID-sync / data-broker services, fired before any consent choice
- 200 cookies set, from 76 third-party domains, with no consent given
- 10 ad frames, including a Google IMA video-ad player
- 31 outbound link sites, most of them ad companies
From the test: The puzzle is fine for older kids, but the free web page loads one of the heaviest ad and tracking setups we have seen, so a parent may prefer a paid or offline Sudoku.
| Ages it suits | about 10 and up |
|---|---|
| What its terms say about age | Easybrain's terms say users must be at least 16; those 16-18 need a parent or guardian to agree. The privacy policy says it is not designed for under-16s and may block the game or show only non-targeted ads when app-store signals point to a younger user. (terms) |
| Price | Free, with paid extras. Free with ads; a one-time 'No Ads' purchase is $14.99 on the App Store (Oct 2026). |
| Works on | Web, iPhone and iPad, Android |
| Account | No account needed |
| Ads | Yes |
| In-app purchases | Yes |
| The AI in it | No AI. |
What's good
- Clean puzzles at many levels
- Hints and notes help beginners learn
- Free to play on any device
Watch for
- Frequent ads, including video ads
- Terms require users to be 16 or older
- Personalized ad tracking unless you opt out
- Daily challenges and tournaments push daily play
Data and privacy
The privacy policy says it uses many third-party ad networks for personalized ads with advertising IDs, and US residents' data may be 'sold' or 'shared' for that under state law; you can opt out in the app's privacy settings. Read the privacy policy.
Does it work?
No studies found.
In the Big Index
- On the list 18 best logic and puzzle games and apps for kids
Alternatives to Sudoku.com
Desk researchFree, with paid extrasNo ads
99math
99math (Estonia) · ages about 5-14 (grades K-8)
A low-effort, free way for teachers to make fact practice lively; parents of kids who dislike timed competition may want a calmer tool.
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ABCya
ABCya.com LLC (a division of IXL Learning) · ages about 4-12 (pre-K to grade 6+)
Handy for quick grade-level practice in class or at home; skip if you want an ad-free experience without paying.
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Adventure Academy
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Good for kids who love online games and need a nudge toward school subjects; families wanting no social contact should set chat to off or choose a solo app.
Desk researchFree, with paid extras
Arcademics
Arcademics · ages about 6-14 (grades 1-8)
Fine for quick fact-fluency races at school or home; families who want no ad tracking or who have a child anxious about speed should skip it.
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Be Internet Awesome: Interland
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A good free starting point for online safety with kids 7-12, best paired with family talks since the game alone did not change behavior in testing.
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Blob Opera
David Li with Google Arts & Culture · ages about 4 and up
A delightful five-minute music toy for any age; not a music course.
Where these facts come from
- https://sudoku.com/
- https://easybrain.com/terms
- https://easybrain.com/privacy
- https://apps.apple.com/us/app/sudoku-com-number-games/id1193508329
Prices, terms and features change. Nobody paid to be listed, nothing here is an affiliate link, and Peabody never rates itself. Where we and the maker disagree, the maker's own pages are the ones to trust.