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The #1 jet lag app

Don't waste a single day.
Trusted by 1.7 million travelers.

4.7 · 6,000+ ratings
See my MileagePlus® offer
“Game-changer for frequent fliers”
"Saves time and money"
"Indispensable for business travelers"
“Say goodbye to jet lag.”
"It might just move the travel industry forward”
“Tired of jet lag? This app will help”
“The travel industry’s new fix for jet lag”
“The science has won consumers over”

Claim your MileagePlus® benefit

Premier 1K®

FREE

Claim
MileagePlus® members
$24.99 / 1 year
You earn 500 miles
Claim
or, try it free
Join United MileagePlusUnited Airlines MileagePlus benefit
★★★★★
Works flawlessly
★★★★★
Jet lag no more!
★★★★★
Magic!
★★★★★
A triumph
★★★★★
Easy and effective
★★★★★
Life changing

Advanced science.
Easy to use.

It’s as simple as taking small actions at specific times.
Timeshifter jet lag advice
Practicality Filter™ adjusts advice to the “real world”.
Timeshifter jet lag plan
It takes less than a minute to create a jet lag plan.
Create a Timeshifter jet lag plan

Travelers love Timeshifter

No more grogginess, confusion, extreme tiredness, and cheeseburger cravings at 2am.

★★★★★
4.7 / 5
(6,000+ ratings)
Timeshifter jet lag app fan: Sara Quiriconi

"Timeshifter saved my work day after flying a red eye from LAX to MIA. Meanwhile my co-worker (who didn't use Timeshifter) dozed off for half the day at his desk. Business and well-being focused travelers all need to be using Timeshifter!”

Sara Quiriconi
Travel Wellness Expert
Timeshifter jet lag app fan: Sandy Anuras from Expedia

"I recently started using Timeshifter, an app that helps you tackle jet lag. I travel internationally a lot, both for business and for leisure (my parents live in Bangkok), and it can be hard to get in quality time for a seven-day trip. I found that using Timeshifter reduced my jetlag “hangover” by days! It helped me really enjoy my time with my mom and dad in November.”

Sandy Anuras, Senior Vice President, Global Applied AI at Panasonic
Senior Vice President, Global Applied AI at Panasonic
Timeshifter jet lag app fan: Former NASA Astronaut Mike Foreman

“Avoid jet lag the way astronauts do. As an astronaut I did a great deal of traveling internationally for speaking, training, etc. NASA had access to doctors and scientists who developed algorithms that gave us written schedules to follow before, during and after our trips to help us avoid jet lag. These are the same algorithms used by Timeshifter. As a retired astronaut I use this app religiously when I travel. It works!”

Mike Foreman
Former NASA Astronaut

It works!

Based on 129,852 surveys, travelers who followed the advice were 14.1 times less likely to report very severe jet lag compared to travelers who didn’t follow the advice.

Traveler using Timeshifter to eliminate jet lag
96.4%

of our users cross time zones without feeling jet lagged

Traveler not using Timeshifter to eliminate jet lag
14.1x

increase in very severe jet lag when not following our advice

Join 1.7 million timeshifters

Whether you’re traveling for business, going on vacation, or competing in a sports event abroad, the Timeshifter jet lag app can help optimize your performance, enjoyment, and health.

Timeshifter jet lag app with more than 1.7 million users worldwide

Replace jet lag myths with real science

Our 1-minute video
explains the science
Former NASA Astronaut
talks about timeshifting

Trusted when performance matters

Excited Nico Rosberg (Mercedes-AMG Petronas Formula 1 driver) celebrating with team members on the race track at night.

"I just had that little bit of extra capacity, brain power, and energy left for the crucial moments. Anything extra you can bring to the table is going to help you in that moment – and I’m sure that’s part of why I won the world championship.”

Nico Rosberg
VC Entrepreneur & 2016 Formula 1 World Champion

Key features

Circadian Time is the foundation of every Timeshifter jet lag plan
Circadian Time™
Advice is adjusted according to your biological time
Practicality Filter™ makes jet lag advice easy to follow in the real world
Practicality Filter™
Makes advice easy to follow in the “real world”
Timeshifter jet lag advice notifications
Advice notifications
Push notifications show you advice – even without opening the app
Timeshifter pre-travel jet lag adjustment
Pre-travel adjustment
Start adjusting before your departure
Reduce jet lag on quick turnarounds
Quick Turnaround®
For business travelers who want to be at their best during short trips
Jet lag plan overview
Intuitive 3-hour view
See a quick 3-hour view, or view full plan for planning purposes
Reduce jet lag on multi-city trips
Complex itinerary support
One-way, round-trips, and even complex multi-city trips
Reduce jet lag when you have many stopovers
Unlimited stopovers
The advice takes all of your stopovers into account
Jet lag and flight delays and cancellations
Flight editing
Simply edit your itinerary when a flight is delayed or cancelled

The science of jet lag

The key to reducing jet lag is individually-timed light

Light is the most important time cue for resetting your circadian clock. Correctly timed light exposure and light avoidance will accelerate your adaptation. Seeing light at the wrong time will make your jet lag worse.

Circadian rhythms regulate your biological systems
Circadian rhythms regulate nearly all biological systems
Crossing time zones disrupts your circadian rhythms
Our circadian rhythms are disrupted when crossing time zones
Fast Company endorsement of the Timeshifter jet lag app

Claim your MileagePlus® benefit

Premier 1K®

FREE

Claim
MileagePlus® members
$24.99 / 1 year
You earn 500 miles
Claim
or, try it free
Join United MileagePlusUnited Airlines MileagePlus benefit
★★★★★
Works flawlessly
★★★★★
Jet lag no more!
★★★★★
Magic!
★★★★★
A triumph
★★★★★
Easy and effective
★★★★★
Life changing

Timeshifter® MileagePlus® Offer — Terms & Conditions

1. Overview of the Offer

Timeshifter Inc. ("Timeshifter"), in partnership with United Airlines MileagePlus®, is offering eligible MileagePlus members access to an annual subscription to the Timeshifter app. The offer is available in two tiers, based on MileagePlus status:

  • Premier® 1K® and Global Services® members: a complimentary (no-cost) annual Timeshifter subscription.
  • All other MileagePlus members (Premier Platinum, Premier Gold, Premier Silver, and general members): 500 MileagePlus award miles when you purchase an annual Timeshifter subscription.

Both tiers provide 365 days of access to Timeshifter's personalized jet lag plans and related app features. The Timeshifter app and subscription service are provided solely by Timeshifter Inc. United Airlines and MileagePlus are not responsible for the Timeshifter app, its content, availability, or performance.

2. Eligibility and Enrollment

To qualify for this offer, you must:

  • be an active MileagePlus member in good standing;
  • be at least 18 years of age;
  • have a valid MileagePlus account number; and
  • create a Timeshifter account (or sign in to an existing account).

Enrollment is valid only through the co-branded landing page at timeshifter.com/united. Members must redeem the offer via this page to be awarded the applicable MileagePlus benefit. Subscriptions purchased or activated through any other channel – including the Apple App Store, Google Play, or timeshifter.com – are not eligible for this offer.

Premier 1K / Global Services: Your complimentary annual subscription is activated at no cost upon enrollment and verification of eligible status.

All other members: Purchase an annual subscription through the landing page, and 500 MileagePlus miles will be credited to your account following verification of the qualifying purchase.

Limit one offer per MileagePlus member. This offer is available only to MileagePlus members and may not be redeemed by non-members. Non-Premier 1K and Global Services members may elect a free trial before committing to an annual subscription. The free trial does not qualify for 500 MileagePlus miles. To earn miles, you must return to the co-branded landing page and purchase a paid annual subscription, which you may do at any time during or after the trial period.

Members are eligible to re-enroll upon completion of their annual term, through the co-branded landing page with their then-current MileagePlus status and redeem the offer again.

3. Benefits and Limitations

What's included: 365 days of access to Timeshifter, including personalized jet lag plans tailored to each member's chronotype, typical sleep pattern, and travel itineraries.

Limitations:

  • The benefit is personal to the enrolling member, is non-transferable, and has no cash value.
  • Limit one redemption per MileagePlus member for the duration of the offer.
  • The 500-mile award is issued once per eligible member and only for a qualifying annual subscription purchased through the landing page.
  • MileagePlus miles will post to the member's account within 6 weeks of a verified qualifying purchase.
  • This offer may not be combined with any other Timeshifter promotion, discount, or offer.
  • MileagePlus award miles are subject to the MileagePlus program rules, which govern in the event of any conflict.
  • The Timeshifter app, including access, app availability, and feature set, is provided by Timeshifter Inc. and is subject to Timeshifter's Terms of Use (available at timeshifter.com/legal/terms-of-use) and Privacy Policy (available at timeshifter.com/legal/privacy-policy). United Airlines makes no representations or warranties regarding the Timeshifter app or service.

4. Data Use and Privacy

By enrolling in this offer, your name, MileagePlus account number, and MileagePlus status tier will be shared with Timeshifter Inc. solely for the purposes of verifying your eligibility, activating your subscription, and administering this offer as described below. Timeshifter will process your data as an independent data controller in accordance with its Privacy Policy. For information on how United Airlines handles your personal information, please see the MileagePlus Privacy Policy at united.com/en/us/fly/privacy-policy.html. Timeshifter may use your MileagePlus status tier to tailor communications about this offer and your Timeshifter subscription. Timeshifter will not use your MileagePlus data for direct marketing unrelated to this offer, for analytics (except aggregated reporting to United Airlines on offer performance), or for the training of artificial intelligence models.

5. Offer Dates and Terms

  • This offer is currently expected to remain available through December 31, 2028, subject to earlier termination or modification by Timeshifter or United Airlines.
  • Each annual subscription is valid for 365 days from the date of activation.
  • Redemptions and mile credits are awarded based on the date the qualifying action is verified.
  • The offer, including the MileagePlus benefit, is provided subject to the MileagePlus program rules and the Timeshifter Terms of Use and Privacy Policy.

6. Modifications

Timeshifter reserves the right to modify, suspend, limit, or terminate this offer, in whole or in part, at any time and without prior notice, to the extent permitted by law. Any changes will be posted to the landing page at timeshifter.com/united.

Members are responsible for reviewing the terms in effect at the time of enrollment.

This offer is void where prohibited. Members are responsible for any applicable taxes.

7. Disclaimers and Limitation of Liability

THE TIMESHIFTER APP AND SUBSCRIPTION SERVICE ARE PROVIDED BY TIMESHIFTER INC. UNITED AIRLINES MAKES NO WARRANTIES, EXPRESS OR IMPLIED, REGARDING THE TIMESHIFTER APP OR SERVICE, INCLUDING WITHOUT LIMITATION ANY WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. TO THE FULLEST EXTENT PERMITTED BY APPLICABLE LAW, UNITED AIRLINES SHALL NOT BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, CONSEQUENTIAL, OR PUNITIVE DAMAGES ARISING FROM OR RELATED TO YOUR USE OF, OR INABILITY TO USE, THE TIMESHIFTER APP OR SERVICE, INCLUDING BUT NOT LIMITED TO DAMAGES FOR LOSS OF DATA, LOSS OF PROFITS, OR PERSONAL INJURY. Any claims relating to the Timeshifter app or service should be directed to Timeshifter Inc. at team@timeshifter.com.

Timeshifter® is a registered trademark of Timeshifter Inc. MileagePlus®, Premier®, 1K®, and Global Services® are registered trademarks of United Airlines, Inc.

* MileagePlus miles accrued, awards, and benefits issued are subject to change and are subject to the rules of the United MileagePlus® program, including without limitation the Premier® program (the "MileagePlus Program"), which are expressly incorporated herein. United® may change the MileagePlus Program including, but not limited to, rules, regulations, travel awards and special offers or terminate the MileagePlus Program at any time and without notice. United and its subsidiaries, affiliates and agents are not responsible for any products or services of other participating companies and partners. United and MileagePlus are registered service marks. For complete details about the MileagePlus Program, go to united.com.

See additional MileagePlus terms and conditions.

© 2026 Timeshifter Inc. All rights reserved.

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.

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