# Open-Smartwatch/open-smartwatch-os

The Open-Smartwatch Operating System.

Repository: https://github.com/Open-Smartwatch/open-smartwatch-os
Canonical: https://ross.abutalabs.com/products/open-smartwatch-os
Homepage: https://open-smartwatch.github.io
Language: C
License: GPL-3.0
License Family: copyleft
Last push: 2026-06-27T09:19:04+00:00

## Health v2 (maintenance only)
Score: 74/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 89, release rhythm 40, longevity 100
- inputs: {"age_days": 2198, "days_push": 67, "days_rel": 596, "gap_med": 0, "n_releases_24m": 4}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1129, forks 173 (observed 2026-08-28T04:03:42.078882+00:00)

## What it is
The open-source operating system/firmware for the Open-Smartwatch, an ESP32-based DIY smartwatch built from open hardware modules and 3D-printable cases. It is built with PlatformIO, supports watchfaces, apps, games, and optional Lua scripting, and includes an emulator for development.

## Use cases
- flash custom firmware onto an open-source smartwatch
- build my own DIY ESP32 smartwatch
- develop custom watchfaces and apps for a wearable
- run an emulator to test smartwatch firmware without hardware
- add Lua scripting to a smartwatch project

## When to choose
- you own or are building an Open-Smartwatch (Light or GPS edition)
- you want a fully open, modifiable smartwatch firmware
- you want to experiment with wearable development on ESP32 hardware

## When to avoid
- you need firmware for a commercial smartwatch like Pebble, Wear OS, or Apple Watch
- you want a polished consumer smartwatch experience out of the box
- your project targets non-ESP32 microcontrollers

## Facets
- artifact type: application
- maturity: active
- function: embedded, gui, game-engine, sdk
- domain: embedded-systems, hardware, cross-platform, developer-tools
- platform: embedded, iot, cpp, c
- tags: smartwatch, esp32, firmware, open-source-hardware, wearables, platformio, diy-electronics

## Member repositories
- Open-Smartwatch/open-smartwatch-os (main) score 74

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:03:42.078882+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T06:38:18.272028+00:00, confidence not recorded.
  - readme: https://github.com/Open-Smartwatch/open-smartwatch-os (fetched 2026-08-28T04:03:42.078882+00:00, sha b6b0fd7948c6)
  - homepage: https://open-smartwatch.github.io (fetched 2026-08-29T12:42:45.722977+00:00, sha f16d4f98ad8c)
- Data as of 2026-08-30T08:39:29.467469+00:00.