ZSWatch/ZSWatch
ZSWatch - the Open Source Zephyr™ based Smartwatch, including both HW and FW. observed · 2026-08-28
Health v2 · maintenance only
85/100
- Activity 97
- Release rhythm 60
- Longevity 100
Flags: prerelease_only
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-09-03. Adoption (stars, forks) is never an input.
- gap_med: 53.0
- age_days: 1467
- days_rel: 174
- days_push: 20
- n_releases_24m: 3
Adoption not part of the score
3340 stars · 308 forks observed · 2026-08-28
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded
ZSWatch is a fully open-source smartwatch project covering both hardware (KiCad PCB designs) and firmware written in C on the Zephyr RTOS with an nRF5340 BLE chip, round touch display, and multiple sensors. It includes an LVGL-based app framework, a Flutter companion app for Android/iOS, and a development kit (WatchDK) for building and flashing custom firmware.
Use cases
- build your own open source smartwatch
- custom smartwatch firmware on Zephyr RTOS
- BLE wearable with round touch display
- learn embedded development with nRF5340
- flash custom watch apps with LVGL
- open source hardware smartwatch design
- develop wearable firmware without proprietary blobs
When to choose
- you want a fully open-source smartwatch with no binary blobs, from PCB to firmware
- you want to learn or experiment with Zephyr RTOS and nRF Connect SDK on real hardware
- you want to write custom watch applications on an LVGL-based framework
- you need BLE connectivity, sensors (IMU, pressure, magnetometer), and a round touch display in a DIY wearable
When to avoid
- you want a polished consumer smartwatch out of the box without soldering or flashing firmware
- you need long battery life comparable to commercial smartwatches
- you require cellular/LTE, Wi-Fi, or full app-store ecosystems
- you are not comfortable with embedded toolchains, compiling, and flashing firmware
Facets
application · maturity active
embedded gui embedded-systems iot hardware cross-platform embedded iot c smartwatch zephyr-rtos lvgl ble nrf5340 open-source-hardware wearable kicad companion-app watchdk bluetooth sensors
4 sources
- readme: https://github.com/ZSWatch/ZSWatch · fetched 2026-08-28 · 59c0fa6b10b8
- homepage: https://zswatch.dev · fetched 2026-08-29 · a4c35ad83703
- site_page: https://zswatch.dev/docs/intro · fetched 2026-08-29 · 837e4d920c9b
- site_page: https://zswatch.dev/docs/getting-started/companion_app · fetched 2026-08-29 · 4aff11503f9c
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| ZSWatch/ZSWatch | main | 85 |
For agents
Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem