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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

4.8 out of 5
192 Ratings
192 Ratings
ggfnyc ,

I’m sold! This app is amazing!

Recently flew from JFK-HKG-ICN-HKG-JFK. I was worried because I usually get pretty hard with jet-lag, even on flying shorter distances - and I really had to hit the ground running when I arrived. Well I can honestly say that I never experienced any jet-lag effects during my trip - or upon my return. . My colleagues were all complaining and they would hit a wall at around 3-4pm and complain that they woke up in the middle of the night and could not go back to sleep. Meanwhile I was bright eyed and bushy tailed. One of the people I was visiting in Seoul, even commented on how refreshed I looked, given I had flown almost 20 hrs the previous day. I followed the app as close as I could. I also utilized those blue light blocking glasses when I was supposed to be avoiding light - but couldn’t completely control my environment. Regarding melatonin, I find that most people take too high of a dose. I would start with a 2.5 mg dose prior to sleep. If I woke up at least 4 hrs before I planned to - and felt I would have trouble falling back to sleep, I would take another .5 to 1.0 mg dose and would fall right back to sleep. On my outbound 16 hr flight to Hong Kong, my flight departed at 9am - and the app instructed me to sleep the first 7 hrs of the flight. Taking the low dose melatonin each time I woke up (approx) every two hrs - really helped. Will definitely subscribe to the annual plan and rely on this for all future long-haul trips.

_jefe ,


Entered travel details for a trip from Eastern Timezone to Japan and was provided a plan. The plan delivered guidance on when to sleep, seek/avoid light, caffeine, and take melatonin (which I substituted with Tylenol PM without acetaminophen). I followed the plan closely, but didn’t really do anything special with light aside from be aware of light around me and make small adjustments such as opening or closing plane window. I arrived in Japan and actually had energy to explore some the first night there and got a full night’s sleep. My first full day in Japan I felt completely normal despite the 14 hour offset, and the normal feeling persisted for the entire trip. Upon return, I again followed the plan, and had normal energy for work my first day back. Coworkers were actually surprised by my alertness. I’m a very routine oriented person and don’t typically adapt so well to changes. This app is amazing and completely worth the in-app purchase, gave me an extra day of vacation and extra day of productivity upon return. Also very well designed.

Wipx ,

Wow! This really works!!

I am adding to my original review which follows. We went to Vietnam and Timeshifter again worked amazingly well. The time was almost exactly the opposite of our time. We were only gone 8 days. Timeshifter had me sleeping all night the first night in Vietnam and functioning great from the first full day there. Upon my return I slept well the first night and never experienced jet lag. I could not be more thrilled!!

Remarkable! I travel monthly and am the worlds worse with jet lag for some reason. My husband bounces back and I spend a week waking up at 3 a.m. I am miserable and functioning poorly.

My first trip using TimeShifter had me happily asleep all night from the day I left on my trip and again when I got home. I never had a sleepless or disjointed night sleep the beginning of my trip nor upon my return. I am thrilled!!!! Easy to follow and works!!!

On a trip to Zimbabwe some years ago I was really out of sync and losing it. Finally turned to sleep meds which are awful too. So groggy. Wish this App had been available sooner.

Next big test is in January. Vietnam is a day and 13 hours off my time I believe. Can’t wait to try my TimeShifter then.
Customer service is AWESOME by the way. So worth the minimal cost for more enjoyable travel!!!!
Thanks for this great travel aid!!!!!!


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
© 2016-2019 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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