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

Added more explanations, bug fixes

Ratings and Reviews

3.0 out of 5
3 Ratings

3 Ratings

atdr.99 ,

Add notifications

I haven’t yet been able to follow a recommended schedule properly—this app really needs notifications reminding the user when to seek light and darkness to be effective

Samboth ,

Alright, but...

There doesnt appear to be anyway to reset the whole thing. I'm coming off of 2 weeks night shift. I would be interested to see how this performs but cant adjust my normal wake / sleep.

Semiferalerol ,

Doesn't work

I'm sure the internations are good but this app is quite simply broken. Read the reviews (they are right- I've tested it) and avoid it.

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.


The University of Michigan
45.9 MB

Requires iOS 9.2 or later. Compatible with iPhone, iPad and iPod touch.



Age Rating


  • Family Sharing

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

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