Similar to smartphones, but smaller, restricted in functionality even more, and on a wrist. Like the smartphones, these will usually run an ARM chip, and either WatchOS or Android Wear. A few of them are based off of more obscure architectures and OSes.
Just a simple comparison table between two early 00s watch-esque PDAs. Apparently in 2005 the Fossil Wrist PDA has 4x the RAM of the OnHand PC.
A very unoptimized port, but still, it is a functional port of Doom. WatchOS 2 is the version used?
Runs very smoothly in the emulator. The video depicts version 6. Would be nice with a small stylus, or a bigger watch.
This device runs an operating system which is known to emulate various devices with EOPs. See the Classic Mac OS and DOS pages.
Windows 3.1 runs mediocre, while Windows 95 can barely even run applications. However, they do in fact run.
Just running some game APKs on the little Android Wear.
https://www.youtube.com/watch?v=1ei2-jBGGYk (DOOM)
https://www.youtube.com/watch?v=_zlCekkyF78 (Flappy Bird)
https://www.youtube.com/watch?v=xyxt2DhqVU4 (GTA III)
https://www.youtube.com/watch?v=ul6y0yOKthI (MCPE 0.9.5)
Only software decoding players work
Using something called QQT player, and is smooth at low resolutions.
First build the image
Unsure if there’s more model info to this, past “Huawei Watch”. Touchscreen, flashing, and display all work, but of course, the output attempts to render itself in a square form factor. Other than that, the device functions on postmarketOS.
https://wiki.postmarketos.org/wiki/Huawei_Watch_(huawei-sturgeon)
successfully running Linux and X11
A custom research watch with full Linux functionality, alongside of course, being a watch. Lead to some PDA-esque “watches” in the early 00s.
https://researcher.watson.ibm.com/researcher/view_group_subpage.php?id=6102
Turn on your watch and swipe from the top left corner
It boots, has touchscreen, Xwayland, and the accelerometer. Since this watch has a square screen, it probably features postmarketOS in a fashion superior to other smart watches.
UART is multiplexed on the USB port. The watch has five pads that are directly connected
Unlike the G Watch, the R means round. While it can still run postmarketOS, the circular screen makes it a lot less practical. Still, Xwayland, touch, booting, and so on all work.
This is a PlatformIO project
Not dependent on any sort of operating system, but a cool proof of concept nonetheless.
WARNING: Doing this will delete ALL your data on the device, so backup all your data before continuing!
More fully featured than the Ticwatch Pro below. Has display function, WiFi, and a working touchscreen!
https://wiki.postmarketos.org/wiki/Ticwatch_C2%2B_(mobvoi-skipjack)
When the image created with the downstream kernel is flashed onto the device works
A pretty basic smartwatch instance of postmarketOS. It does run on there, but there isn't even a display output yet. USB networking works!
https://wiki.postmarketos.org/wiki/Mobvoi_Ticwatch_Pro_(mobvoi-catfish)