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Used by astronauts, elite athletes, and top CEOs, Timeshifter is the most advanced jet lag tool available.

Travel + Leisure: "This jet lag app will help you adjust to new time zones quickly"
The Wall Street Journal: "Indispensable app for business travelers"
CNBC: "Innovative new travel app that saves time and money"

Generic jet lag advice is, well… generic. It won’t reduce your jet lag and can actually make it worse. Each traveler and trip is different and requires a personalized approach taking your sleep pattern, chronotype, flight plan, and a range of personal preferences into account.

Timeshifter is developed with Harvard Medical School Associate Professor Steven Lockley, Ph.D., and based on the latest research in sleep and circadian neuroscience.

Timeshifter not only provides advice to alleviate the disruptive symptoms of jet lag such as insomnia and sleepiness, but addresses the underlying circadian disruption by rapidly resynchronizing the circadian clock to the new time zone.

The Timeshifter algorithm is the most advanced of its kind:

// Based on the latest research in sleep and circadian neuroscience
// Practicality filter adjusts advice to the "real world"
// Quick turnaround advice for short business trips
// You can start adapting even before your departure
// Notification system offers advice - even without opening the app
// Works well across all times zones - even offline and in-flight

When you use Timeshifter for the first time, you will quickly realize how many things you could have done differently in the past. It’s a highly empowering experience, and it requires no special equipment. Just bring a sleep mask and your favorite sunglasses.

Join the community of timeshifters around the world who demand a better travel experience. Whether you’re traveling for business, going on vacation, or competing in a sports event abroad - with this app, you will arrive ready to go.

This app offers in-app purchases. Purchase individual jet lag plans as-you-go or pick the annual subscription for unlimited plans. Payment will be charged to your iTunes account at confirmation of purchase. Subscription automatically renews unless auto-renew is turned off at least 24 hours before the end of the current period. Account will be charged for renewal within 24 hours prior to the end of the current period. You can manage your subscription and auto-renewal may be turned off by going to your Apple account settings after the purchase.

Read our Terms of Use at www.timeshifter.com/terms/terms-of-use/

What's New

Version 1.2.2

We release updates regularly, and we're always looking for ways to make the experience better. Let's dive into the enhancements you'll find in our latest update:

## Fixed

- We have fixed an issue where certain trips could not be entered due to an incorrect restriction in the date selector for stopovers
- We have fixed and issue with overlapping plans on certain short trips
- We have added support for 45-minute time zones

If you have any feedback or run into issues, please use our live chat in the app. We love to talk.

Ratings and Reviews

4.6 out of 5
38 Ratings
38 Ratings

It really works!

I travel a lot and there are all sorts of tricks folks recommend to manage jet lag - I was looking for something that was actually proven in an research type of way (I’m a technical guy).

I tried Timeshifter on my recent trip from Houston to Guam since I was crossing dateline - i plugged in my flight schedules and dates for the trip and it gave me a nice detailed plan when steps to take each day (including days prior to travel and after return). It also sent me me regular notifications of each step while I was on the trip

What I found was that if you follow the recommended sleep times, light, and caffeine intake/avoids - it really made jet lag a non-event. I didn’t quite follow it religiously - I might miss the sleep times by an hour or so and light recommendations are sometimes not easily accomplished BUT even with this effort I found myself easily adjusting to time zones and more importantly the return home was really easy.

My colleagues were all dragging about and saying I’m so tired - I was like I’m not - let’s work!

So I guess you can called me a true believer in timeshifter and will use it in my long trips always.

PS I asked several questions along the way and I always go a response from them very quickly - that’s nice


Favorite tool for this frequent flier!

I read a lot of great reviews about this app but was a little skeptical. But- I decided to try it anyway. The first trip was free and I had the perfect testing ground- 10 days in remote Africa (8 hour time difference)- with almost 100hours of travel to make it round trip. I entered my flight info and followed all of the travel, caffeine, light, and sleep suggestions starting three days before departure.

Guys! It was amazing! Worked beautifully. I would have totally slept at the wrong times. But, following the plan, I am happy to report i experienced NO jet lag while two of my travel companions struggled. The fourth in our party of 4 also used the app (at my suggestion) and was jet lag free. BOOM!

Definitely recommend! Thanks for this great travel tool!


Jetlag? What jetlag?

Before my partner and I embarked across the globe I pondered how to reduce jetlag. ‘There must be an app for that?’ I thought. I discovered Timeshifter and it delivered. Traveling from San Francisco to Iceland then Paris wasn’t so bad. The app gave us a plan to sleep on the flight and calibrate day by day considering our caffeine intake at certain times, exposure to light and taking melatonin. Instead of sleeping through our vacation we enjoyed it! Best part was on the return we had a busy weekend back in San Francisco. Thanks to the app we didn’t miss a beat. Highly recommend to anyone traveling across time zones. It also has a well designed interface.

Developer Response

This review took you a while to write, and for that we are extremely grateful. Please keep in touch and let us know if you have any ideas for future versions. Thanks so much.


Timeshifter Inc.
48.9 MB
Requires iOS 8.0 or later. Compatible with iPhone, iPad, and iPod touch.
Age Rating
Rated 12+ for the following:
Infrequent/Mild Medical/Treatment Information
Infrequent/Mild Alcohol, Tobacco, or Drug Use or References
© 2016-2018 Timeshifter Inc. All rights reserved.
In-App Purchases
  1. Timeshifter $24.99
  2. jet lag plan $9.99
  3. discounted jet lag plan $4.99


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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