OLED · BLE · Coin cell

A new orbit for an old classic.

Kepler replaces the movement of a popular digital watch with a crisp OLED and a Bluetooth brain; it keeps time to the second and, on the side, mirrors what matters on your phone. Three buttons. One coin cell. No subscription.

Based on the MIT-licensed F91-Kepler design (Pegor Karoglanian) · hand-built · no subscription

The Kepler watch

Your phone on your wrist

Calls, texts, email and voicemail show up on the watch; the last five notifications stay available. Plus music control, find my phone, weather and a picture of your own from the app.

Works without a phone too

Set the time right on the watch, stopwatch, timer, flashlight, silent alarm and its own temperature on the Info screen. Ten screens, three buttons, one coin cell.

Yours to keep

User-replaceable CR2016 coin cell, no charging. No account, no cloud, no subscription. Built on the MIT-licensed F91-Kepler design; the Android app is open source.