Cronosurf Wave watch

Cronosurf Wave is a chronograph watch app for Android devices and a watchface for Wear OS watches. No other OS are supported for now.
Note: Due to latest Google policies allowing only WFF watch faces on the Play Store (from 2026 on), we had to remove the Wear OS version from this release. Previously installed watch faces will continue to function.

This app is based on the original design started 2014 as a web-based technology demonstrator (cronosurf.com). Its main focus lays on design, functionality and usability. It has become the most popular chronograph watch face for Androidd/Wear OS. If you are a chronograph watch lover, you'll find yourself using Cronosurf as your day-to-day app for alarm, countdown timer and stopwatch.

Since Cronosurf has many features, the app includes a comprehensive user manual. The Button Assistant (also available on the web version) labels each button according to the momentary state of the watch and helps you to quickly get familiarized with the basics. To activate it, simply tap on the area above the watch.

Discover all the special features and great usability of Cronosurf Wave. You will love it!

Standalone Android smartwatches are also supported. Note that Cronosurf runs as a regular app on these devices (not as a native watchface).

Key features
- 12-Hour Stopwatch/Chronometer with 1/20 seconds resolution
- 12-Hour Countdown-Timer (CD) with optional automatic repetition
- Daily/Once Alarm (AL) with optional gradual volume
- Optional vibration for AL/CD signals
- Customizable presets for both AL and CD
- UTC-based world time with 15-minute steps
- Current date, day of the week and the unique Cronosurf's monthly calendar
- Innovative 100-year-Calendar
- Week number
- Indication of moon phases
- Compass (when supported by device)
- Screen-On timer
- Analog and digital battery level indicators
- Second hand: pulse or sweep motion
- Set mode supports set-by-drag
- Torch function
- Day/Night modes (white/colored components)
- Tachymeter in stopwatch mode (experimental)
- Live Wallpaper (basic interactivity, customizable background, adjustable size/position; enable it like any other Live Wallpaper.)
- Lots of extra functionality you've probably never seen on other chronographs
- Ad-based, (only small banner, no fullscreen ads)

For reference and for user who still have the Wear OS version:
- Wear OS: Optional automatic Day/Night mode switching at user defined fixed times or via light sensor (when available)
- Wear OS + Android standalone: Auto-Return to TME mode after 1.5 minutes; long press [B] disables for current mode till next mode change
- Wear OS: Optional minimalist ambient mode
- Wear OS: Support for Moto 360 and other 'flat tire' displays

If you like Cronosurf Wave, try the Pro version. It has no ads and many more features!

Permissions:
- Run at startup: For reactivating a pending AL or CD.
- Prevent device from sleeping: While an alarm is being played, so the user can see the watch and stop the alarm.