➗ Math apps and platforms · 🎮 Learning games and sites
KenKen
By KenKen. Visit KenKen
Desk research from the maker's own pages. Not yet tried by us. Checked 2026-10-24.
Grid logic puzzles that mix Sudoku-style rules with arithmetic. Each row and column uses each number once, and outlined cages must reach a target number with a given operation. The site offers free daily puzzles from 3x3 to 9x9, a puzzle builder, tournaments and phone apps. A free KenKen Classroom program emails teachers weekly puzzle sets. KenKen started in a Japanese classroom in 2004.
Our take: A good free math-and-logic habit for kids who like Sudoku; pay for Premium or use the teacher emails if ads are a problem.
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 (7 ad frames), and an email sign-up pop-up greets every visitor, child or not. |
|---|---|
| Data: 1 out of 5 | 18 ad networks plus data brokers and ID-sync services (agkn, id5, rlcdn, liadm, tapad, crwdcntrl) fired before any consent. |
| Ease: 2 out of 5 | An email pop-up and a cookie banner covered the entire first phone screen before any puzzle could be seen. |
| Cost honesty: 3 out of 5 | Free daily puzzles, but the menu shows AD-FREE and PREMIUM options and the pop-up pushes a "one-time offer". |
What we found
- The first visit contacted 147 third-party hosts on 78 sites and set 93 cookies, 33 of them on third-party domains.
- 18 known ad networks and 8 tracking services loaded, including the data brokers agkn.com, liadm.com, tapad.com and crwdcntrl.net.
- 7 ad frames were on the page.
- A "Receive FREE KenKen Puzzles - Register now" email pop-up and a cookie banner filled the first screen.
From the test: Good puzzles, but the first visit set off 18 ad networks and six data brokers and blocked the screen with an email pop-up.
| Ages it suits | about 7 and up (3x3 grids for beginners) |
|---|---|
| What its terms say about age | The terms of service give no minimum age. The privacy policy says KenKen does not knowingly collect personal information about children under 13. (terms) |
| Price | Free, with paid extras. Free daily puzzles with ads; ad-free Premium US$2.99 a month or US$29.99 a year (Oct 2026). Fees are non-refundable under the terms. |
| 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
- Real arithmetic practice inside a logic puzzle
- Grids scale from easy to very hard
- Free weekly classroom puzzles
- No account needed
Watch for
- Third-party targeted ads on the free site
- Premium fees are non-refundable
- Larger grids frustrate beginners
- Leaderboard and progress tracking are paid
Data and privacy
The privacy policy says KenKen and third parties use cookies, pixels and ad-serving technology, and may use demographics such as age and gender to target ads. Read the privacy policy.
Does it work?
The maker's own claims only (math skills, logic, perseverance); no study was linked or found.
In the Big Index
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Where these facts come from
- https://www.kenkenpuzzle.com/
- https://www.kenkenpuzzle.com/terms_and_conditions
- https://www.kenkenpuzzle.com/privacy_policy
- https://www.kenkenpuzzle.com/parents_philosophy
- https://www.kenkenpuzzle.com/teachers_classroom
- https://www.kenkenpuzzle.com/membership
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.