OnePlus introduced Zen Mode, its reply to Google’s Digital Wellbeing in Oxygen OS 9.5 which started rolling out along with the launch of OnePlus 7 Pro. While the feature is more strict and aggressive compared to similar offerings from Apple and Google by literally rendering the phone unusable for 20 minutes, the company has finally come up with reasons to justify how they ended up choosing this time limit.
After a while of internal testing, OnePlus found that 20 minutes produced better results to positively disconnect people from their smartphones. They have also mentioned that having 20 minutes as the time limit encouraged people to try out the feature and resulted in people using the feature more often.