[mdiesel]

My OnePlus (not sure how widespread the feature is on android) has a Zen Mode, once started you can't use the phone for most things until the timer elapses.

A bit different, but good if you want a break.

[SamBam]

It's interesting, but I wonder if

1) The majority of people disable the feature after a short time (if they needed it in the first place, it's hard to maintain the self-control to keep it enabled, when it's presumably trivial to disable), and

2) Whether the cognitive effects remain, even when it's locked, because the mere presence of the phone makes you think about it, and it being locked makes you think about what you're missing.

[Insanity]

If you don't have a oneplus, I suggest the "forest" app. Helps me tremendously. http://forestapp.cc/

(No affiliation, just a happy user)

[wussboy]

I’m going to try this. Thanks!