Microsoft has decided to bring back its Tetra Lockscreen app for Windows Phone, after unpublishing the app from the Windows Phone Store in March. However, its reappearance does not come with any new updates.
Microsoft first launched Tetra Lockscreen as part of its first wave of Microsoft Garage apps in October 2014. The app displayed a number of things on the lock screen, including calendar events, the phone's current location, steps activity stats and more. The last update to the app, before it was unpublished, was in January 2015, which added local weather information.
As with its removal, there's no word on why Microsoft decided to publish Tetra Lockscreen once again, but hopefully this means that the app will also be getting some updates that will add some new features and fix some of its bugs in the future.
Thanks to "Wam1q" for the tip!