El OnePlus 7 and OnePlus 7 Pro They come with OxygenOS 9.5, the latest version of the customization layer that the company adds to its models. While it's still based on Android Pie, it brings new features not yet available for older OnePlus phones. Two of those features are Screen Recorder and Zen Mode.
OnePlus has already confirmed that Zen Mode will come to the OnePlus 6 and OnePlus 6T via an OTA update. There is no time frame for the update yet, but you don't have to wait that long to get the feature on older models.
AndroidPolice inform that Zen Mode feature works on older OnePlus devices once you install the APK. The same applies to the Screen Recorder. So all you have to do is download the APKs via APK Mirror and install them. At the end of the article we leave the links. (Discover: OnePlus 7 vs. OnePlus 7 Pro: in-depth comparison)
OnePlus 7 Zen mode
They said that both apps won't show up in app drawer. To locate them, you will need to open the Quick configuration changes and find the Screen Recorder / Zen Mode. Then you will need to drag the tiles to the existing ones. You can then start them from there, grant permissions, and configure them for first use.
Based on feedback, the screen recorder has been tested on the OnePlus 6T, OnePlus 6, OnePlus 5T, and OnePlus 3T, while Zen Mode has been confirmed to work on the OnePlus 6 / 6T and OnePlus 3T.