AsteroidOS is an open source operating system designed for smartwatches.[3][4] It is available as a firmware replacement for some Android Wear devices.[5] The motto for the AsteroidOS project is "Hack your wrist."[6]

AsteroidOS 1.0 default watchface
DeveloperFlorent Revest[1]
Written inQt/QML
OS familyUnix-like
Working stateActive
Source modelOpen source[2]
Marketing targetSmartwatch
Official reviewed version 1.0 and gave it 3.5 out of 5 stars.[7]

Software Architecture

AsteroidOS is built like an embedded Linux distribution with OpenEmbedded.[8] It works on top of the Linux kernel and the systemd service manager.[9] AsteroidOS also includes various mobile Linux middlewares originally developed for Mer and Nemo Mobile such as lipstick and MCE.[10]

The user interface is completely written with the Qt5 framework.[8][11] Applications are coded in QML with graphic components coming from Qt Quick and QML-Asteroid. An SDK with a cross-compilation toolchain integrated to Qt Creator can be generated from OpenEmbedded for easier development.[12]

Asteroid-launcher is a Wayland compositor and customizable home screen managing applications, watchfaces, notifications and quick settings. Asteroid-launcher runs on top of the libhybris compatibility layer to make use of Bionic GPU drivers.[13]

AsteroidOS offers Bluetooth Low Energy synchronization capabilities with the asteroid-btsyncd daemon running on top of BlueZ5.[14] A reference client named AsteroidOS Sync is available for Android users.[14][15]

Shipped Applications

As of the 1.0 release, the following applications are shipped and pre-installed by default in AsteroidOS:[16]

  • Agenda: Provides simple event scheduling capabilities
  • Alarm Clock: Makes the watch vibrate at a specific time of day
  • Calculator: Allows basic calculations
  • Music: Controls a synchronized device's music player
  • Settings: Configures time, date, language, Bluetooth, brightness, wallpapers, watchfaces and USB
  • Stopwatch: Measures an elapsed time
  • Timer: Counts down a specified time interval
  • Weather: Provides weather forecast for five days

See also


  1. "AsteroidOS is an Open Source OS for Smartwatches". xda-developers. 2016-12-08. Retrieved 2016-12-25.
  2. "Licenses – AsteroidOS". Retrieved 2016-12-25.
  3. "An open-source alternative to Android Wear OS for smartwatches emerges".
  4. "AsteroidOS: An Open Source Alternative to Android Wear". 1 March 2016.
  5. "Install – AsteroidOS".
  6. "AsteroidOS Homepage".
  7. "AsteroidOS review". Wareable. June 19, 2018.
  8. Brown, Eric (May 23, 2018). "AsteroidOS and OpenWatch Aim to Open Up Smartwatch Market".
  9. "Boot Process – AsteroidOS". Retrieved 2016-12-25.
  10. "AsteroidOS/meta-asteroid". GitHub. Retrieved 2016-12-25.
  11. "qtcon: QtCon Program". Retrieved 2016-12-25.
  12. "Creating an Asteroid App – AsteroidOS". Retrieved 2016-12-25.
  13. Prakash, Abhishek. "AsteroidOS: An Open Source Smartwatch Operating System - It's FOSS".
  14. "Wear OS alternative AsteroidOS is available for several smartwatches". May 16, 2018.
  15. "AsteroidOS Sync - F-Droid". Retrieved 2016-12-25.
  16. Revest, Florent (2018-05-15). "AsteroidOS 1.0 released - AsteroidOS". Retrieved 2018-05-15.
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