There’s a Wear OS alternative called AsteroidOS that you can install now
If you want to try it out, you’ll need one of a fairly limited list of smartwatches, with the LG G Watch, LG G Watch Urbane, LG G Watch R, Asus Zenwatch 1, Asus Zenwatch 2, Asus Zenwatch 3, and Sony Smartwatch 3 being currently supported on this version of the OS. Don’t worry if your watch isn’t currently supported — support for more devices is planned, and a guide on how to port new watches to the OS has been written.
If you’re lucky enough to have an already supported device, there’s an installation guide to walk you through the process that also includes details on exactly how supported each smartwatch is — for instance, there’s no support for sensors on the LG G Watch Urbane, while the Asus Zenwatch 1 has full support.
There’s the option to dual-boot or completely replace whichever OS your watch is currently running, and although the selection of functions is unsurprisingly limited, the first release of AsteroidOS comes with notifications, an agenda, an alarm clock, a calculator, a music controller, a weather forecast app, as well as other various bits and pieces. It’s an impressive roster, and all you need if you just use your watch for notifications, music control, and as — well — a watch. There’s also support for 20 languages, including Dutch, English, French, German, Spanish, and others. Future updates plan to add various features like always-on display, calendar syncing, and more.
If you’re a tad handier with code than the usual user, then you might be interested in the also released development SDK. Being open source and based on Linux, it shouldn’t be too hard for would-be developers to get going on AsteroidOS, and some examples and a tutorial have been put together for anyone who’s willing to look into developing new apps for the OS. Because AsteroidOS has been built on Linux and some other handy-dandy Linux tech, the devs boast that AsteroidOS will be able to run pretty much anything — including Quake.
AsteroidOS seems to have been something of a labor of love for its developers, with lead developer Florent Revest thanking the 100 contributors who helped AsteroidOS grow and mature.