A hexagon sudoku for iPhone. Settle one bear in every honey patch, with no two bears sharing a comb lane in any of the three hex directions. Every board has exactly one solution and never needs a guess.
Free with ads and optional in-app purchases. iPhone only for now; Android is coming soon.
How to play
Square-grid queens puzzles need three rules. On a honeycomb every neighbor already shares a lane with its cell, so CombDoku only needs two. Hexley the bear walks you through them on a coached first board.
Tap to leave a free claw mark, double-tap to place a bear, drag to claw in bulk, and press and hold to light up a cell’s three lanes. You get three hearts; a bear on a wrong cell costs one. Learn the four solving techniques →
Daily Challenge
Every player gets the same hard board, drawn from 40 that never appear in the campaign. Retry as often as you like. Solve it once and you see where you stand among today’s solvers. A new board arrives at 12:00 UTC.
Leaderboards
Every campaign clear earns points: more for hearts kept and for skipping power-ups, multiplied on harder boards. Yesterday’s top three win free Hints and Reveals. Rows show your avatar, name and flag, and you can hide the flag any time.
Hints & Reveals
A Hint reads your current board and shows one card: the technique, a one-line reason and a ghost preview to apply. A Reveal places the most useful bear and claws everything it rules out. Neither ever costs a heart.
Achievements
Every achievement pays out Hints or Reveals the first time you earn it: 14 Hints and 7 Reveals in all.
Screenshots
What’s new
Badges everyone can see. Released . Launched September 9, 2026.
FAQ
More in CombDoku support.
Honeycomb sudoku is a logic puzzle played on a grid of hexagons. In CombDoku the board is split into colored honey patches, and you place exactly one bear in each patch so that no two bears share a comb lane in any of the three hex directions. Like sudoku, every puzzle has one solution you can reach by deduction.
No. Every level is checked when it is generated: it must have exactly one solution, and it must be solvable using only logical steps. Some harder levels start with one bear already placed; that given bear is part of what keeps the board guess-free.
2,000 campaign levels. 600 are bundled in the app and play offline; the rest download in the background. The Daily Challenge draws from a separate pack of hard boards that never appear in the campaign.
Yes. It’s free with ads: a banner, and sometimes a full-screen ad between levels, never mid-puzzle. Optional purchases are Hint and Reveal packs ($0.99 and $1.99), Remove Ads ($2.99), and CombDoku+ ($1.99 a month or $11.99 a year) for unlimited Hints, no banner or between-level ads, monthly Reveals and a badge, with a 7-day free trial for eligible new subscribers. US prices.
CombDoku is on iPhone today (iOS 26.5 or later). It also runs as an iPhone app on Apple silicon Macs and Apple Vision Pro. An Android version is in development and coming soon; there is no iPad-specific version.
No. The streak is a daily check-in that counts each local calendar day you open CombDoku. The Daily Challenge is a separate shared board with its own percentile ranking.
Free on iPhone. 600 levels play offline, with a new Daily Challenge every day.
