Comparison

Timeshifter vs JetShift

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Timeshifter

This app provides personalized plans to combat jet lag based on circadian science. It offers practical advice for light exposure and avoidance to help you adjust to new time zones quickly and reduce symptoms like insomnia and sleepiness.

Highlights
  • Personalized jet lag plans
  • Circadian Time™ advice
  • Practicality Filter™
  • Pre-travel adjustment advice
  • Push notifications for advice
  • Automatic detection of short trips
Features
Currently charting
Read full description

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

About

JetShift

This app uses circadian rhythm science to help your body adjust to new time zones quickly. It provides personalized guidance on light exposure, sleep, melatonin, and caffeine intake to minimize jet lag symptoms like fatigue and sleeplessness.

Highlights
  • Circadian rhythm science
  • Personalized light exposure timing
  • Melatonin scheduling
  • Stepwise sleep shifts
  • Smart caffeine intake
  • Offline functionality
  • Calendar integration
Features
Read full description

Whether you're a frequent flyer, international traveler, or planning your first long-haul trip, JetShift helps your body adapt to new time zones quickly and efficiently. Say goodbye to sleepless nights, daytime fatigue, and foggy mornings. --- Built on Circadian Rhythm Science JetShift applies cutting-edge research on the circadian cycle, your body’s internal clock that regulates sleep, mood, and energy. Travel disrupts this rhythm, but with precise timing of light, sleep, melatonin, and caffeine, JetShift guides you back on track. --- How JetShift Works: - Light exposure timing: Light is your strongest cue for shifting your internal clock. JetShift tells you exactly when to seek or avoid light. - Melatonin scheduling: The app helps you take melatonin at the right time, supporting your body's natural adjustment. - Stepwise sleep shifts: Gradually adjust your sleep schedule before or after your flight to reduce the shock of sudden changes. - Smart caffeine intake: Stay alert without disrupting your sleep by following optimal caffeine windows. All plans are personalized, easy to follow, and automatically synced to your flight and calendar. --- Perfect For: - Long-haul travelers - Business professionals - Athletes and performers - Jet setters and digital nomads Why JetShift? - Scientifically validated strategies - The easiest solution to skip jetlag - Fits into any schedule - automatically adapted to your calendar - Works offline during your flight - Fully adaptable for multi-stop and return trips --- The easiest solution to skip jetlag. Let JetShift help you feel great, wherever you land. Download now and give it a try on your next trip! --- Terms of Use: https://www.jet-shift.com/terms-and-conditions Privacy Policy: https://www.jet-shift.com/privacy-policy

Screenshots

Timeshifter4 screens
JetShift4 screens

Verdict

The call

The clearest difference is ratings volume: Timeshifter at 2.7K against JetShift's 1. Timeshifter also leads on chart position (#29 vs unranked) and update cadence (weekly vs fortnightly). JetShift's advantage is rating (5.0 vs 4.7) and iOS requirement (15.0 vs 17.0). On price, ads, in-app purchases and monetization model there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Timeshifter sells 3 in-app purchases, starting at $24.99 per year and JetShift sells 3 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

JetShift holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Timeshifter has 2.7K ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

Timeshifter ships an update weekly, JetShift fortnightly. The most recent releases landed on October 30, 2026 and October 13, 2026 respectively.

Scorecard5 real differences · 6 level
Timeshifter versus JetShift: the parameters behind the verdict, then further details
ParameterTimeshifterJetShift
PriceFreeFree
Rating4.7 (2.7K ratings)5.0 (1 ratings) — better
Positive reviews91.8% of reviews—
Number of ratings2.7K — better1
Update frequencyWeekly — betterFortnightly
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFreemium
Best chart rank#29 — better—
DevicesiPhoneiPhone, iPod — better
Requires iOS17.015.0 — better
Further details — not scored
Size62 MB71 MB
Age rating17+17+
DeveloperTimeshifter Inc.Jannik Obenhoff

Customer experience

Timeshifter

All ratings2,671 ratings
Positive90.8%
Neutral2.1%
Negative7.2%
Written reviews1,502 reviews
Positive91.8%
Neutral1.6%
Negative6.6%

JetShift

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

Timeshifter

Reported bugs

2 issues
  • App crashing or getting stuck on a white screen
  • Issues with account login and data loss

Requested features

3 requests
  • Ability to adjust plan for unexpected schedule changes
  • Integration with fitness trackers or sleep apps
  • Recommendations for meal timing and nutrition

JetShift

Not enough reviews yet to summarise bugs or requests.

In-app purchases

3 purchases

Timeshifter

Subscriptions1
  • Timeshifter$24.991 Year
One-time2
  • discounted jet lag plan$4.99
  • jet lag plan$9.99
3 purchases

JetShift

Subscriptions3
  • JetShift Super - Monthly7 Days trial$4.991 Month
  • JetShift Super Annual Discount7 Days trial$29.991 Year
  • JetShift Super - Annual7 Days trial$49.991 Year

Questions

Is Timeshifter free?
Timeshifter is free to download, with in-app purchases available.
Is JetShift free?
JetShift is free to download, with in-app purchases available.
Which has better reviews, Timeshifter or JetShift?
JetShift is rated higher. Timeshifter averages 4.7 out of 5 from 2.7K ratings, while JetShift averages 5.0 from 1 ratings.
Do Timeshifter or JetShift have ads?
Neither Timeshifter nor JetShift shows ads.
Which is updated more often, Timeshifter or JetShift?
Timeshifter ships an update weekly, and JetShift fortnightly. Most recently, Timeshifter was updated on October 30, 2026 and JetShift on October 13, 2026.

Other comparisons