Developer Hub

Build for the wrist.

Faces, apps and tools for an always-on e-paper screen and four real buttons. Write JavaScript in your browser today, go native when you are ready, and ship to people who love to tinker.

Open CloudPebble Read the docs
  • draw(ctx, w, h, time)
  • 64 colors
  • 100% open source

Why build on Pebble

Build for the wrist, not the pocket.

A watch is not a tiny phone. Pebble gives you a screen that never sleeps, buttons you can find without looking, and a battery that lets people forget the charger exists.

Always on, always yours

E-paper holds your last frame with no wake gesture. Design the resting state and it is on display all day.

draw(ctx, w, h, time)

Four real buttons

Up, select, down and back. They work in gloves, in the rain and in the dark. Muscle memory beats tapping glass.

onButton(name)

Battery in weeks

Up to 30 days on Pebble Time 2 and about two weeks on Round 2. Build with the tick, not against it, and keep it that way.

update(time)

Open to the metal

PebbleOS is 100% open source. When the docs run out, read the code, fix the bug, and send the pull request.

github.com/coredevices

Quickstart

Three steps to your wrist.

  1. 01

    Start in the browser

    Open CloudPebble, write a draw function, press Build. The log explains every warning and the preview shows your face in seconds.

    function draw(ctx, w, h, time) {
  ctx.fillStyle = '#FF5500'
  ctx.fillRect(0, 0, w, h)
}
    Open CloudPebble
  2. 02

    Go native with the SDK

    Need sensors, background work or phone communication? Install the official Pebble SDK on your machine for native C apps, JavaScript companion logic and emulators for every platform.

    C appsPhone-side JSEmulator
    Install steps on developer.repebble.com
  3. 03

    Publish to the store

    Build for time2 and round2, add screenshots and a one line description, then share it with a community of 15,000+ faces and apps.

    .pbwiPhone + Android
    Publishing guide Browse the store

Platforms

Two screens. One API.

Every build targets a platform. Read w and h instead of hardcoding sizes and a single face runs on both.

time2Shipping now

Pebble Time 2

200 x 228 px

  • Display1.5" 64-color e-paper touchscreen
  • ShapeRectangular
  • BatteryUp to 30 days
  • SensorsHeart rate, compass, dual mics, speaker
  • Input4 physical buttons + touch
Buy Time 2, $225 Platform guide
round2Shipping now

Pebble Round 2

260 x 260 px

  • Display1.3" color e-paper, edge to edge
  • ShapeRound, no bezel
  • BatteryAbout 2 weeks
  • SensorsAccelerometer, magnetometer, dual mics
  • Input4 physical buttons + touch
Buy Round 2, $199 Round layouts

Resources

Everything, one tap away.

Docs

Guides for faces, watchapps, buttons, color and the build log, written for this platform.

Read the docs

CloudPebble

Write, build and preview a face without installing a thing. Your browser is the toolchain.

Start coding

Open Source

How PebbleOS fits together, where it came from, and how to send your first contribution.

Explore the source

Forum

Ask questions, share screenshots of what you are building, and find people to build with.

Join the conversation

App Store

15,000+ watchfaces and apps. The best way to learn what works on a wrist is to wear it.

Browse apps

Blog

Release notes, deep dives and behind the scenes stories from the Pebble Team.

Read the blog
Live

The platform, right now.

System status
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Numbers come straight from this site's API.

Community

Come build with us.

The Pebble community has kept these watches alive for years. Ask your first question, show off your first face, or help someone ship theirs.

Join the forum GitHub

Need a test device?

Nothing beats seeing your face on real e-paper, on a real wrist.

Shop Pebble Time 2 Shop Pebble Round 2 Compare