Last year, Microsoft launched an experimental lock screen for Windows Phone dubbed “Tetra Lockscreen”. The lock screen was designed by Microsoft Garage and was aimed at bringing “functionality to the forefront of your Windows Phone 8.1 devices”. Now, the app has been “retired” from the Windows Phone Store.

The app went missing from the Windows Phone Store earlier this month with no explanation as to why it was unpublished. On the official Microsoft Garage website, Microsoft had the following to say: “Retired. Thanks for your feedback, we learned a lot.”

Tetra Lockscreen, an experiment by Microsoft, brought “functionality to the forefront of your Windows Phone 8.1 device.” The app was focused on fast, fluid, and frequent interactions, allowing you to see various important calendar events, location data, activity tracker, and much more right on your lockscreen.

Did you use this app? Let us know in the comments below.

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