OnePlus debuted Zen Mode in OxygenOS alongside the launch of the OnePlus 7 series. Back then, the feature just aimed to help users put their phones down to help them focus on more important tasks. Over the years, the app has gained new features such as more duration options, daily reminders, zen challenges, and more. OnePlus debuted a new, redesigned Zen Mode UX with its OxygenOS 11 update. Now, the new Zen Mode app is being made available to other OnePlus phones on Android 10 through the Google Play Store.

With OxygenOS 11, Zen Mode not only received a redesign, but it also gained a few features. There's now a multi-person Zen Mode which creates a room where others can join in and ensure that no one is using their phones.

The new Zen Mode update works only on OnePlus phones running Android 10 and above. Here is the changelog for the update:

You can get the new update through the Google Play Store. Alternatively, you can sideload the APK from APKMirror.

Zen Mode is one of the implementations from OEMs for a digital detox. Other initiatives, like Digital Wellbeing from Google, also work towards the same principles. While our smartphones are exciting pieces of technology, we do tend to overuse it and end up getting addicted to it. Digital detox as a principle helps us detach from our smartphones and enjoy the world around us a little more. These apps make us cognizant of our digital habits and help us keep our phones down.

OnePlus Zen Mode Developer: OnePlus Ltd.
Price: Free
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Thanks to XDA Senior Member Some_Random_Username for the tip and screenshots!