Timeshifter

• Free to download
• In-app purchases

Last verified 28 Jul 2026

4.7 2577 ratings · App Store

1. 5/5Timeshifter helped on both ends of my trip

   I came across this app while reading an article about how to handle jet lag when traveling to Europe. I downloaded it and really appreciated that the first plan was free so I could try it out. Just know that you must have valid flight numbers to input so the algorithms can do their work based on timing and locations. I was flying from Washington DC to Lisbon, Portugal. With flight numbers and a quick bit of information about my usual bedtimes and whether I was a morning or night person, a plan was created. The plan and app overall is clean and efficient in design and navigation. It is written for the lay person and nicely summarized the research that backed up the plans guidance on sleep, light and caffeine w use to help me prepare starting 2 days in advance of each departing flight. And there are 2 days of guidance for when you land in the new time zone. This was the biggest shift I’d had to make and while I didn’t have another trip to compare it to, my body definitely didn’t “crash” for 3 or 4 days upon arriving in Portugal which is 5 hours ahead of EST. The guidance, visual chart of what to do when, and why we’re all helpful to understand why doing these things as best as I could would help minimize jet lag. The real test was the return flight home and while I felt a little tired the next day I had closely followed the earlier guidance and found that the late day light and prescribed bedtime back home did help me get back to my normal pattern right away. I am very glad I followed this plan and will be happy to pay as I go for future long trips. I don’t travel often but it’s worth having this app to know I can make the most of my time and energy without being wiped out.

   Scbiro · 28 Jul 2026

2. 4/5Definitely Helped

   I discovered the Timeshifter app while researching how to prevent Jetlag. My wife and I were planning a trip to Portugal and Spain and I was concerned that we would suffer from Jetlag. I have never traveled internationally before, so I was worried about this. The Timeshifter recommendations are easy to understand and make sense, and it’s nice that they provide you a daily breakdown of what to do. I found it impossible to remember everything, so it was nice to be able to refer to the guidance they gave whenever I needed to. I won’t say that we followed the recommendations completely, but I’d say we were close to 90% and following their directions. We been able to follow 100%, then my probably would have been better and I would’ve given a five star review instead of a four star review. that’s not fair, I’m always reluctant to give to anyone or anything. we didn’t follow the advice as much on the return trip because we were traveling from east to west which is easier. All we had to do was stay up later and sleep later. Our results on the return ship were a bit muddled because I caught a cold and so it’s hard to tell whether my fatigue is due to the illness or because I didn’t follow the directions or because the directions didn’t work.

   Scooter12160 · 28 Jul 2026

3. 5/510 plus 10 time zone jumps with Timeshifter.

   I may have used Timeshifter 12 times. Each time it was transatlantic or at least 8 time zones of travel. I was so skeptical the first time my buddy had it pulled up. It was COVID time and I love coffee. He was still drinking it but only a certain times. I was interested as it didn’t seem like major changes in the travel except small time windows when caffeine was used. Also, limiting and increasing light exposure seemed really important. I tried it half heartedly and had no jet lag. It was a little surreal. Then I tried it for myself. I live in Asia and America half time and the travel can be brutal. No jet lag the next time. I couldn’t believe how fast I was at meetings and back thinking clearly. The next day. I only experienced small amounts of extra sleepiness at normal bedtime. Convenient. I’m a thinker so I investigated. It’s really all about light exposure and not using caffeine at the wrong times. I have not had jet lag one time I’ve used it!!! I’m using it to travel from London to Dallas as we speak. I have 6 children and my family needs me present sometimes upon arrival. Try it even if skeptically. The first trip was free and sold me on the NASA science behind the recommendations. It’s really subtle and no hardcore advice to fight through sleepiness etc. My life is easier on Timeshifter science.

   Teimuray · 28 Jul 2026

4. 5/5I’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.

   ggfnyc · 28 Jul 2026

5. 5/5Follow it & REALLY works - recommend to All

   I came across the name of this app in an article and have since come across it in more online articles since downloading and using it. I was doing some simultaneous research on my upcoming trip to Europe (from the US) and also on helping my mom reset her circadian rhythm, as it’s become a major quality of life issue for all of us. I downloaded it onto my iPhone, for this first free trip, And was determined to use it as an experiment because I remember in the past having terrible jet lag upon arrival in Europe. I admit that I followed it to a T and started following suggestions on the app starting four days before departure. I know from experience that I was in a much better state of mind upon arrival. I’ve recommended this to friends and family, particularly for the distance that you have to travel, specially for those that travel often and or for business purposes. I really appreciate the simplicity and beauty of the app with the visual cues and also the ability to read more and learn why and how things work. Because I plan to do more traveling in the coming years I will definitely purchase use of the app. I have them for their review online and found more information and research behind the app and I’m sharing this with my mom who really needs to reset her circadian rhythm but has no guidance on that. Kudos to an exceptional app that is extremely user-friendly!

   EastEndPghPetiteGurl · 28 Jul 2026

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