iPhone Screenshots


Entrain is a mobile application that uses your lighting history, activity, and heart rate to recommend schedules of light and dark. These schedules are able to shift a model of the circadian clock to a new time zone as quickly as possible. Users can opt-in to share their data with the University of Michigan for research purposes.

What’s New

Version 3.4

This app has been updated by Apple to use the latest Apple signing certificate.

Added more explanations, bug fixes

Ratings and Reviews

1.7 out of 5
3 Ratings

3 Ratings

Imega3 ,

Awful App

Full of glitches, don’t bother.

Tim Moore ,

Difficult to use and buggy

It is very difficult to figure out how to configure this app, and this is hurt further by bugs that seem to forget or reset settings unexpectedly. I'm not sure how it determines the current time zone, because it doesn't match the one used by the rest of the system or any place I scheduled travel. I can't recommend this app.

iPotential ,

UI is too complex...

...with a learning curve that is therefore too steep for those users who first try to use to prior to travel.

I downloaded it prior to 24hrs flying, but couldn't make sense of it after providing all the inputs.

Missed opportunity that could be meet with a smarter UI (at least for travel).

App Privacy

The developer, The University of Michigan, has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer's privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

    Up to six family members will be able to use this app with Family Sharing enabled.

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