The Clank split stone

Tap a tag.
Put the phone down.

Clank blocks the apps you choose until you tap your tag again. No willpower required, just a walk to wherever the tag lives.

Free and open source · iPhone · Works with any blank NFC tag

How it works

Three taps to a quieter phone

Clank uses Apple's Screen Time to block apps on the device itself. Nothing leaves your phone, and Apple never tells Clank which apps you picked.

An NFC token beside the split stone
01

Pair any NFC tag

A sticker, a fob, a tag on your keys. Clank remembers its hardware id and nothing else.

A phone resting between the two stone halves
02

Pick what pulls you away

Choose the apps and websites that eat your evenings. Group them into modes for work, sleep, or being present.

The stone halves apart with a contactless signal between them
03

Tap to clank. Tap again to unclank.

Hold the tag to your phone and the apps go quiet. Only the same tag brings them back.

Features

Small app. Firm boundaries.

Everything you need to make a distraction cost a walk across the room, and nothing you do not.

A stone clock beside the split stone
Schedules

Clank on a rhythm

Evenings, mornings, the work block. A schedule starts a mode on its own, and a tag tap still ends it early.

A white and a graphite stone half resting together
Strict mode

Cannot be deleted while clanked

iOS refuses to delete or install any app until you unclank. That includes Clank itself, so the exit is your tag, not the App Store.

Modes

One tag, many moods

Keep a few sets of apps ready. Switch the active mode before you tap.

Lock Screen

The tag opens Clank

Store a short link on the tag once. A tap on the locked phone opens Clank and scans right away.

Live Activity

See it on the Lock Screen

A quiet banner shows how long you have been clanked, plus a Home Screen widget.

Shortcuts

"Clank my phone"

Siri, Shortcuts, and the Action button can start a clank, with an optional timer.

Emergency

Five escape hatches

Lost the tag? You get five emergency unclanks. Use them wisely.

Privacy

Nothing leaves your phone

No account, no server, no analytics. Blocking runs in iOS. Apple hides your picks behind tokens even from Clank.

The phone is not the problem. The distance to it is.

Open source

Built in the open, on Expo and Swift

Read the code, build it yourself, or help make it better. Inspired by broke, in the spirit of the original Brick.

Star on GitHub