# Timeshifter — Jet lag app > Personalized jet lag plans based on circadian science for travelers. (iPhone/iPad app by Timeshifter Inc..) - Source: https://appshunter.io/ios/app/timeshifter/id1380684374 (this page in markdown: same URL + `.md`) - Developer: [Timeshifter Inc.](https://appshunter.io/developer/1380684373) - Category: Travel, Health & Fitness - Price: Free with in-app purchases - Rating: 4.70/5 from 2,608 App Store ratings · 1,425 written reviews indexed - Age rating: 17+ - Requires: iOS 17.0 · 64 MB - Languages: American English - Released: 2018-06-20 - Data updated: 2026-08-27 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/timeshifter/id1380684374/reviews.md ## What is Timeshifter? 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™: advice timed to your circadian clock - Practicality Filter™: adjusts advice to the "real world" - Quick Turnaround®: 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 ## Key features - Personalized jet lag plans - Circadian Time™ advice - Practicality Filter™ - Pre-travel adjustment advice - Push notifications for advice - Automatic detection of short trips ## Pricing and in-app purchases Base price: Free. **Subscriptions** | Subscription | Price | Period | | --- | --- | --- | | Timeshifter | $24.99 | per year | **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | jet lag plan | $9.99 | one-time | | discounted jet lag plan | $4.99 | one-time | ## Chart rankings - #36 in Top Grossing · Travel (US App Store) ## What do users think of Timeshifter? Overall sentiment: positive **Pros** - 👍 Easy to use - 🚀 Effective at reducing jet lag - 💡 Personalized recommendations - ⏱️ Helpful notifications - 🔍 Explains the science behind the recommendations **Cons** - 🕰️ Difficult to follow recommendations during travel - 🤒 Melatonin not always readily available - 💰 Expensive subscription model **Commonly reported bugs** - App crashing or getting stuck on a white screen - Issues with account login and data loss **Most requested features** - Ability to adjust plan for unexpected schedule changes - Integration with fitness trackers or sleep apps - Recommendations for meal timing and nutrition ## Recent user reviews (10 of 1,425) All indexed reviews: https://appshunter.io/ios/app/timeshifter/id1380684374/reviews.md ### 5/5 — UK to USA *2026-08-19, version 2.5.3* Highly recommend u ### 5/5 — Timeshifter is smooth *2026-08-18* It really helped me transition seemlessly without even a day lost. It’s wonderful. ### 5/5 — Welcome to Paris *2026-08-18, version 2.5.3* I was apprehensive about having to shift forward by 6 hours for my vacation. I followed the guidelines in Timeshifter and arrived ready for my two-week adventure. ### 5/5 — Very useful for long-haul flights! *2026-08-16, version 2.5.3* I’ve used Timeshifter a few times now for long-haul flights (Australia to Scotland three times) and have experienced hardly any jet lag. Takes the guesswork out of trying to adjust to the new time zone and keeping myself on track with sleep! ### 5/5 — Didn’t feel my jet *2026-08-15, version 2.5.3* This is the 3rd time I use this app. Going from North America to either Dubai or London. I enjoy using it going to these places rather than coming back . It honestly makes a huge difference with my jet lag adjustment . I did not feel the jet lag at all this time especially ### 5/5 — Works well (when your schedule allows) *2026-08-14, version 2.5.3* I’ve used this app on three separate trips over a couple of years now. In my experience, if you’re able to follow the sleeping schedule, it really helps with adjusting to the arrival time zone faster. In particular with long west-to-east trips, which I find hardest to adjust to. That said, sometimes it’s just not possible with life/disruptions on the aircraft/etc. A good blackout eye cover and noise cancelling headphones do wonders to help though. ### 5/5 — No jet lag issues *2026-08-13, version 2.5.3* Timeshifter kept me on track to go to sleep right away on the flight from the US to Amsterdam and to stop drinking coffee at about 1 pm when I might have snuck in some coffee to stay awake until 10 pm on the first day. Could I have done this on my own? Maybe but when you are tired and disoriented, it is nice to have guidance. I also liked the prep a few days before. Thank you for the app!! ### 5/5 — Really Helpful App *2026-08-12* I used this to go from Toronto to Rome and stayed about 90% on track. I seriously did not have jetlag! Will definitely use again ### 5/5 — Essential Travel Tool! *2026-08-12, version 2.5.3* I’ve used the Timeshifter App for my last two international athletic competitions and it has come up big both times by limiting or eliminating performance sapping jet lag! Easy to follow plan really helps prepare you for seamless travel across multiple time zones with minimal effort. Highly recommend this App for anyone who travels internationally! ### 5/5 — It works!! *2026-08-12, version 2.5.3* I use Timeshifter at least twice a year on long haul flights. I follow the plan at home before I leave and same on return back to Australia. jet lag is always minimal. I’m a big fan and use Timeshifter on all my long international flights. I think the price is well worth the return of not having to suffer through days of jet lag. It’s a wonderful tool! ( I suffered badly from jet lag for many years before discovering TimeShifter. ) ## Frequently asked questions about Timeshifter ### What does the Timeshifter app do? Timeshifter creates personalized jet lag plans based on scientific principles of circadian rhythms. It helps you adjust your body's internal clock to new time zones by providing specific advice on when to expose yourself to light and when to avoid it, aiming to reduce symptoms like insomnia and sleepiness. ### How does Timeshifter use circadian science? The app leverages the understanding that light is the primary cue for your body's circadian clock. It provides tailored recommendations for light exposure and avoidance, timed precisely to help your internal clock synchronize with your destination's time zone, addressing the root cause of jet lag. ### Is Timeshifter free to use? Your first jet lag plan is provided for free with no commitment. After that, you can choose to purchase individual plans as needed or opt for a subscription to get unlimited plans for all your travels. ### What kind of advice does the app offer? The app offers practical advice that considers your real-world schedule, thanks to its Practicality Filter™. This includes guidance on light exposure, sleep timing, and pre-travel adjustments to help you prepare for your journey and minimize jet lag symptoms. ### Who is Timeshifter intended for? Timeshifter is designed for healthy adults aged 18 and older who frequently travel across time zones. It is not intended for pilots and flight crew on duty. The app aims to help users conquer jet lag and improve their travel experience. ## Version history (last 5 releases) ### 2.6.2 — 2026-08-25 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: ## 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. ### 2.6.1 — 2026-08-20 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: ## 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. ### 2.5.3 — 2026-08-11 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 - 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. ### 2.5.2 — 2026-07-29 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: ## 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. ### 2.5.0 — 2026-06-14 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. ## Apps similar to Timeshifter | App | Rating | Price | Category | | --- | --- | --- | --- | | [Shinkansen smartEX App](https://appshunter.io/ios/app/shinkansen-smartex-app/id1253336330) | 1.7 (561) | Free | Travel | | [Singapore Airlines](https://appshunter.io/ios/app/singapore-airlines/id515287841) | 4.7 (43,116) | Free | Travel | | [Flykitt](https://appshunter.io/ios/app/flykitt/id1571767892) | 4.8 (242) | Free | Travel | | [TripIt: Travel Planner](https://appshunter.io/ios/app/tripit-travel-planner/id311035142) | 4.8 (307,106) | Free | Travel | | [seats.aero](https://appshunter.io/ios/app/seatsaero/id6449265212) | 4.7 (5,889) | Free | Travel | | [Rick Steves Audio Europe™](https://appshunter.io/ios/app/rick-steves-audio-europe/id414357125) | 4.3 (493) | Free | Travel | ## More apps by Timeshifter Inc. - [Timeshifter Shift Work](https://appshunter.io/ios/app/timeshifter-shift-work/id1594538527) All apps by Timeshifter Inc.: https://appshunter.io/developer/1380684373 ## Related topics [timeshifter jet lag app](https://appshunter.io/ios/topics/timeshifter-jet-lag-app) · [time zone shifter](https://appshunter.io/ios/topics/time-zone-shifter) · [jet lag timeshifter](https://appshunter.io/ios/topics/jet-lag-timeshifter) · [jet lag time zone shifter](https://appshunter.io/ios/topics/jet-lag-time-zone-shifter) · [time shifter](https://appshunter.io/ios/topics/time-shifter) · [timeshift](https://appshunter.io/ios/topics/timeshift) · [jet lag](https://appshunter.io/ios/topics/jet-lag) · [jetlag sync](https://appshunter.io/ios/topics/jetlag-sync) · [jetlag app](https://appshunter.io/ios/topics/jetlag-app) · [jet lag calculator](https://appshunter.io/ios/topics/jet-lag-calculator) · [jet lag rooster](https://appshunter.io/ios/topics/jet-lag-rooster) · [entrain](https://appshunter.io/ios/topics/entrain) · [jet lag fix](https://appshunter.io/ios/topics/jet-lag-fix) · [my jet lag companion](https://appshunter.io/ios/topics/my-jet-lag-companion) · [jetlagaway](https://appshunter.io/ios/topics/jetlagaway) · [stop jet lag](https://appshunter.io/ios/topics/stop-jet-lag) · [24hourlondon](https://appshunter.io/ios/topics/24hourlondon) · [timeshift app](https://appshunter.io/ios/topics/timeshift-app) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-27.*