Timeshifter2.6.11 - App Store

Reduce jet lag with personalized plans based on the latest sleep and circadian science. Timeshifter creates a plan for every flight and time zone, tailored to your chronotype, sleep pattern, itinerary and personal preferences.

Used by NASA astronauts, F1 teams, NBA players, Olympic athletes and frequent travelers - and rated "as good as it's going to get" by The New York Times.

- The Wall Street Journal: "Indispensable"
- Condé Nast Traveler: "Say goodbye to jet lag"
- WIRED: "Will help reset your [circadian] clock"
- Travel + Leisure: "Game-changer"

WHAT YOU GET
Jet lag plans that show exactly when to seek light, when to avoid it, when to sleep and when to nap, and how to use melatonin (optional) and caffeine correctly (optional) - hour by hour.

PROVEN RESULTS
Based on ~130,000 post-flight surveys:
- 96.4% of travelers who followed their plan avoided severe jet lag entirely.
- Travelers who ignored the advice were 6.2x more likely to experience severe jet lag - and 14.1x more likely to experience very severe jet lag.

YOUR FIRST PLAN IS FREE
Your first jet lag plan is free, with no commitment. After your free plan, you can buy plans as you go for US$9.99 per plan, or subscribe for unlimited plans at US$24.99.

KEY FEATURES
- Circadian Time(TM): advice timed to your circadian clock
- Practicality Filter(TM): adjusts advice to the "real world"
- Quick Turnaround(R): automatically detects short trips
- Pre-travel advice: start adjusting before departure
- Push notifications: view advice without opening the app

JET LAG MYTHS VS. CIRCADIAN SCIENCE
Jet lag cannot be fixed with generic sleep advice, exercise, hydration, dietary supplements, special diets or fasting. None of these reset your circadian clock quickly to a new time zone.

Light is the key time cue that resets your circadian clock. Individually-timed light exposure and light avoidance - based on your chronotype, your normal sleep pattern and your itinerary - is the only way to adjust to a new time zone quickly. Get the timing wrong and jet lag gets worse.

Getting that timing right is complex and unintuitive, which is why generic advice fails. Timeshifter works as your jet lag calculator and planner, doing that timing for you.

WHY WE MADE TIMESHIFTER
We built Timeshifter to make circadian science accessible and help you apply it to reduce jet lag. It targets the underlying cause of jet lag - the disruption of your circadian clock - and reduces the symptoms that come with it, including insomnia, daytime sleepiness, fatigue and digestive discomfort.

Timeshifter was developed with Dr. Steven W. Lockley, a Harvard Medical School faculty member for over 20 years and former neuroscientist at Brigham and Women's Hospital. He is an international authority on circadian rhythms and sleep, with more than 30 years of clinical research experience in humans, and works with NASA astronauts and mission controllers, F1 teams, NBA players, national soccer teams and Olympic athletes.

Whether you are crossing one time zone or ten, on a long-haul flight or a quick turnaround, Timeshifter gives you a jet lag plan built for that trip.

Download Timeshifter and make jet lag history on your next flight.

These statements have not been evaluated by the Food and Drug Administration. Timeshifter is not intended to diagnose, treat, cure or prevent any disease, and is intended for healthy adults 18 years of age or older. Timeshifter is not intended for pilots and flight crew on duty.

Terms of Use: www.timeshifter.com/legal/terms-of-use
Privacy Policy: www.timeshifter.com/legal/privacy-policy

Version History 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
- Overall design and performance improvements

If you have any feedback, or run into issues, please use the live chat in the app. We love to talk. 2.6.11 1d ago 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
- Overall design and performance improvements

If you have any feedback, or run into issues, please use the live chat in the app. We love to talk. 2.6.10 Oct 6 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
- Overall design and performance improvements

If you have any feedback, or run into issues, please use the live chat in the app. We love to talk. 2.6.7 Sep 22 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
- Overall design and performance improvements

If you have any feedback, or run into issues, please use the live chat in the app. We love to talk. 2.6.6 Sep 15 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
- Overall design and performance improvements

If you have any feedback, or run into issues, please use the live chat in the app. We love to talk. 2.6.5 Sep 7 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
- Overall design and performance improvements

If you have any feedback, or run into issues, please use the live chat in the app. We love to talk. 2.6.4 Sep 1 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
- Overall design and performance improvements

If you have any feedback, or run into issues, please use the live chat in the app. We love to talk. 2.6.3 Aug 31 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:

## Added
- minor design and performance improvements

If you have any feedback, or run into issues, please use the live chat in the app. We love to talk. 2.6.2 Aug 25 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
- Overall design and performance improvements

If you have any feedback, or run into issues, please use the live chat in the app. We love to talk. 2.6.1 Aug 20 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:

## Added
- Notification when the jet lag plan ends
- Option to select date when replacing a flight
- Various minor adjustments

If you have any feedback, or run into issues, please use the live chat in the app. We love to talk. 2.5.3 Aug 11 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:

## Added
- Option to delete greyed out flights
- Option to select date when replacing flights
- Overall design and performance improvements

If you have any feedback, or run into issues, please use the live chat in the app. We love to talk. 2.5.2 Jul 29 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
- Overall design and performance improvements

If you have any feedback, or run into issues, please use the live chat in the app. We love to talk. 2.5.0 Jun 14 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
- Overall design and performance improvements

If you have any feedback, or run into issues, please use the live chat in the app. We love to talk. 2.4.2 Jun 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
- Notifications improved to ensure consistent, correct timing on destination

If you have any feedback, or run into issues, please use the live chat in the app. We love to talk. 2.4.1 May 31 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
- Overall design and performance improvements

If you have any feedback, or run into issues, please use the live chat in the app. We love to talk. 2.4.0 May 16 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
- Overall design and performance improvements

If you have any feedback, or run into issues, please use the live chat in the app. We love to talk. 2.3.4 May 15 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
- Overall design and performance improvements

If you have any feedback, or run into issues, please use the live chat in the app. We love to talk. 2.3.1 May 11 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
- Small bug fixes
- Interface improvements

If you have any feedback, or run into issues, please use the live chat in the app. We love to talk. 2.1.39 07/02/2025 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
- Small bug fixes
- Interface improvements

If you have any feedback, or run into issues, please use the live chat in the app. We love to talk. 2.1.38 06/06/2025 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
- Resolved a notification issue affecting some users on iOS 18.3.2 and later
- Fixed an unhandled error when signing in with Google for certain users

If you have any feedback, or run into issues, please use the live chat in the app. We love to talk. 2.1.37 04/03/2025 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
- Bug resulting in a ‘white screen' in certain scenarios

If you have any feedback, or run into issues, please use the live chat in the app. We love to talk. 2.1.36 03/18/2025 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
- minor issues and UI improvements

If you have any feedback, or run into issues, please use the live chat in the app. We love to talk. 2.1.31 01/16/2025 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
-Issue when the user signs out
-Issue related to purchases
-Issues when internet connection is poor or there is no internet connectivity
-Date picker design tweak on iPhone Pro models

If you have any feedback, or run into issues, please use the live chat in the app. We love to talk. 2.1.30 12/16/2024 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
- Problems with the date picker when Display Zoom was activated
- Interface improvements

If you have any feedback, or run into issues, please use the live chat in the app. We love to talk. 2.1.16 12/10/2024 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
- Intercom integration issue
- Date picker issue on iPhone SE and iPhone 15 Pro
- Single jet lag plan purchase issue

If you have any feedback, or run into issues, please use the live chat in the app. We love to talk. 2.1.15 11/29/2024