Download

Get WattLog
on your device

Ride straight from a Chromium browser, or install the app on your device. Either way your data stays in sync — sign in once and pick up where you left off.

No install

Your browser

Chrome or Edge on a computer talks to your trainer, power meter and heart-rate strap over Bluetooth — nothing to install, nothing to update. Open the app, pick your devices, ride. The session lands in the same account as the apps.

Open app.wattlog.pro →

Safari and Firefox cannot reach Bluetooth. On iPhone, iPad and Android, use the app.

Supported

macOS

macOS 11 (Big Sur) and above. Apple Silicon only (M1, M2, M3, M4) — no Intel support. Connects directly to your Bluetooth trainer.

Download .dmg
Supported

iPhone & iPad

iOS 15 and above. Connects directly to your trainer over Bluetooth — no laptop required.

App Store
Supported

Android

Android 9.0 (Pie) and above. Connects directly to your trainer's Bluetooth.

Google Play

Windows and Linux: ride in Chrome or Edge today — native apps are on the roadmap.

Browser can't find your trainer?

Which browsers work?↓

Chrome and Edge on macOS, Windows and ChromeOS work with nothing to set up. Safari, Firefox, Opera and Vivaldi have no Web Bluetooth at all — there, use the app.

I'm on Linux↓
Chrome on Linux keeps Web Bluetooth behind a flag.
  1. Open chrome://flags/#enable-experimental-web-platform-features.
  2. Set it to Enabled.
  3. Restart the browser.
  4. Make sure BlueZ is 5.41 or newer.
I use Brave↓
Brave switches Web Bluetooth off by default.
  1. Open brave://flags.
  2. Search for “Web Bluetooth API”.
  3. Set it to Enabled and restart Brave.
Chrome shows no devices↓
  1. Check that Bluetooth is on.
  2. On macOS, allow your browser under System Settings → Privacy & Security → Bluetooth.
  3. In Chrome or Edge, open Settings → Privacy and security → Site settings → Additional permissions → Bluetooth devices, and make sure app.wattlog.pro isn't blocked.
  4. Close anything else holding the trainer — Zwift, TrainerRoad, or the WattLog app itself: a trainer accepts one connection at a time.
It's a work computer↓
Company policy can block Web Bluetooth in Chrome and Edge, and no flag overrides it.
  1. Ask IT whether Web Bluetooth is disabled by policy (you can check at chrome://policy).
  2. If it is, use the WattLog app on your phone or tablet,
  3. or ride from a personal computer.
I reloaded the page mid-ride↓

The ride keeps running on the server. The page asks you to pick your devices again — one click each — and then carries on where you were. No browser can reconnect Bluetooth without that click.