kerf — Stack Tower
Minimal one-tap block game
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
One tap drops the block. Miss by a hair and the tower narrows — nail it and the combo pays. Five modes, a daily seed, no ads, no timers begging you to come back.
kerf is a stacking game stripped to one decision: when to let go.
A block slides across the screen. You tap. Whatever hangs over the edge is cut away and falls, and the tower gets that much narrower. Land it dead center and you get the width back, the combo climbs, and the score multiplies. There is nothing else to learn, and no way to blame anything but your own timing.
FIVE WAYS TO PLAY
Classic — endless. One miss ends the run.
Daily — one seeded attempt a day, the same tower for everyone, a fresh leaderboard every midnight UTC.
Zen — a miss costs you width, not the run. Stack until the block is a sliver.
Precision — the first imperfect landing ends it. Four points of tolerance, nothing more.
Sprint — sixty seconds, starting fast and getting faster.
BUILT TO BE QUIET
No ads. No energy meters, no coins, no wheel to spin, no notification asking where you have been. Nothing in the game is for sale that touches how it plays.
The whole thing is drawn, not downloaded: flat ink on paper, one accent color, no rounded corners anywhere. Sound is synthesized live from a pentatonic scale, so every landing is a note in key and a broken combo is the one note that isn't. Light and dark themes both ship finished, not inverted as an afterthought.
Plays entirely offline. No account required.
GAME CENTER
Five leaderboards — one per mode, with Daily resetting every day — and ten achievements worth 640 points. Sign in if you want them; the game never waits on it and never nags.
MAKE IT YOURS
Six accent tones, four app icons and a share card, free. Change the accent and the tower changes with it.
KERF COMPLETE — ONE PURCHASE
A single non-consumable unlock, no subscription:
· 18 accent tones instead of 6
· 8 app icons instead of 4
· 4 synthesized sound packs instead of 1
· 4 block surface textures
· 5 share card themes
· Zen, Precision and Sprint, permanently
· The full daily archive — every past day, playable for practice
Every premium mode is playable once for free before you decide. Family Sharing is on.
kerf is the sliver of wood a saw takes out of a cut. It is the part you lose to be precise, which is the entire game.
Ratings & Reviews
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The developer, Yakup Arslan, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Yakup Arslan
- Size
- 8.8 MB
- Category
- Casual
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- kerf Complete $4.99
- Copyright
- © 2026 kerf App. All rights reserved.
