Tumble
Swipe toward an edge and the stone tips over it. Neighbouring cells show the number you would arrive with, so you plan the route instead of trying it.
Logic puzzle · iPhone
Kantling
A stone with numbers, a board of triangles, and nothing random in between.
Kantling tips over its edges from cell to cell. Whatever number ends up on top is decided by the way you came — so every gate, seal and warden on the board is a question about the route, and every answer can be worked out before you move.
Kantling for iPhone
Free, iPhone only, iOS 17 or later. The App Store link appears here on release day.
What kind of puzzle this is
Kantling is for people who like a problem they can reason through rather than guess at. Rolling the stone once around a post on the board brings it back to the same cell with a different face on top — learning to steer that shift is the whole game. Trails are short, there is no timer, and nothing happens that you did not cause.
Unfold
Some trails are fixed corridors. Open the stone into a flat net, swap numbers between its faces, fold it and send it down the corridor.
Twenty lands
The map is the unfolded net of a twenty-faced world. Eighty hand-ordered trails in five chapters, each land with a keeper and one new idea.
Daily trail
One trail per date, the same for every player, unlocked after land 4. Keep a streak if you like; missing a day costs nothing but the count.
Chronicle
A page for every land you reach: its keeper's words, its rune, and your move count against par for each trail.
Hints that never run out
Undo every move back to the start, restart with one tap, ask for the next step of the shortest solution as often as you need. Free, always.
Two ways into the same rule
In Tumble the stone stays as it is and you choose the path. In Unfold the path is set and you rebuild the stone: drag a number onto another face to swap them, press Send, and watch where it stops. A trial run is free and shows exactly which face reached which gate.
Lands 1–4 use an eight-faced stone, which is easier to read. From land 5 on, the stone has twenty faces and sixty ways to sit on a cell.
Twenty Runes and the Faceless
Every land of a twenty-faced world once burned with a numbered rune. Then the Faceless came — a blank stone with no numbers at all — and erased them, so gates open at random and bridges lead nowhere. Kantling is the last stone that still carries its numbers and never falls without a reason. Light the twenty runes again, and in the last land give the Faceless numbers of its own.
The keepers of the lands are an owl at the gate, a ferryman, an old oak, a scribe, a smith and fifteen more. Each speaks once before your first trail and once after the fourth.
Privacy in three lines
- No account, no ads, no analytics, no tracking, nothing to buy. Every trail plays offline and your progress stays on your iPhone.
- At launch the app asks kantling.info whether an update is needed (app id and version only). Push notifications through OneSignal start only if you turn them on in Settings.
- If you write to support from the app, your message reaches us by email — with a reply address and photos only if you add them.
The app speaks English, German, French and Dutch. This site is in English.