In 2019, Google added the cards – or Tiles, in English – to Wear OS, a new way to customize the interface of the watch with information screens to see the weather, news, events, daily activity, and the like. Later, the card limit to be activated was increased to five.
In all this time, these cards were limited to applications pre-installed in Google’s Wear OS, such as Google Fit or time, but the AOSP code indicates that Google would be preparing to open the ban on cards to other developers, with the creation of an API for it.
Cards for everyone (developers)
Wear OS cards work similar to widgets on Android. They are customizable screens that you can place on your mobile to access information such as time, activity, or the stopwatch, sliding with your finger to change from one to another.
Since its introduction in 2019, Wear OS has a handful of cards available, although all of them belong to pre-installed Google apps. Developers have no way of creating their own cards, but this could be about to change, with the creation of an API for Wear OS Cards, unofficially revealed in the AOSP code.
At the moment, there is no more information about it, except that this API may be part of the AndroidX library, which is, in turn, part of Jetpack. It is impossible to predict when we will know more about the Wear OS card API and when we will see the first cards from third-party apps, although, as always, this year’s Google I / O could be a good showcase.