Comparison

StopJetLag vs Timeshifter

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

Head to head
About

StopJetLag

This app provides personalized plans to combat jet lag using a science-backed sleep method. It optimizes your schedule based on flight details, sleep patterns, and destination time zones to help you arrive refreshed and productive.

Highlights
  • Flight-Aligned Sleep Method™
  • Personalized jet lag plans
  • Optimized for flight schedules
  • Considers sleep patterns
  • Destination time zone synchronization
  • Advice on sleep, light, food, and caffeine
Features
Read full description

StopJetLag's Flight-Aligned Plans Don't Just Ask, "How Do I Avoid Jet Lag?" Ask the more important question: ■ When is my first realistic opportunity for core sleep in sync with destination-time and what needs to happen before then? That's at the heart of StopJetLag's Flight-Aligned™ travel planning. The best biological time to sleep and the time your flights allow it can be very different. Your body clock doesn't know you have a connection to make. StopJetLag does. ■ Jet Lag Science Has to Work With Your Flights "Sleep now" isn't useful advice when you're landing, clearing immigration, changing terminals or boarding another flight. StopJetLag analyzes your itinerary, connections and normal sleep patterns to identify a critical anchor: your first realistic opportunity for destination-time core sleep. Then your plan coordinates what happens before and after it. ■ StopJetLag's Flight-Aligned™ Sleep Method StopJetLag provides personalized timing for: • Sleep & rest • Bright light exposure & avoidance • Meals—timing, type & size • Caffeine use & avoidance • Light exercise • Optional melatonin • Transitioning to destination time These recommendations aren't the endpoint-Their coordination with your flights is of primary importance. A sleep recommendation can't ignore when you have to board. Caffeine can't ignore when you need to sleep. None should act as though your connections don't exist. ■ Every Connection Changes What Is Possible An ideal time to sleep is useless if you have to be awake to change planes. A sleep opportunity can disappear because you need to deplane, clear immigration and board again. That's why connections aren't footnotes in a StopJetLag Plan. They help determine the plan. The goal isn't a perfect schedule on paper. It's one you can actually follow. ■ What Happens Before Core Sleep Matters The hours before your first destination-time core sleep matter—when you sleep, stay awake, seek or avoid bright light, eat, use caffeine, exercise and, if you choose, take melatonin. StopJetLag coordinates these influences with your itinerary so they work together rather than as disconnected jet lag tips. The flight itself becomes part of your adjustment strategy. ■ When to Sleep—and When Your Flights Won't Let You. You need enough sleep. Your body clock also needs to move toward destination time. Getting every possible hour of sleep isn't necessarily the same as sleeping at the most useful times. StopJetLag identifies practical sleep opportunities while keeping you awake when your itinerary requires it. The question isn't simply, "Can I sleep?" It's "Is this the right sleep opportunity for where my body clock needs to go next?" ■ Built Around Your Real Trip Your plan can account for departures, arrivals, connections, multi-stop itineraries, normal sleep patterns, practical sleep opportunities, destination time and important events you provide. Trip Notes address itinerary-specific timing issues. StopJetLag Mobile keeps your recommendations available while you travel. ■ Why StopJetLag's Flight-Aligned™ Plans Matter Most jet lag advice tells you what affects your body clock. The harder problem is knowing when you can realistically use those influences. Jet lag advice asks what your body needs. StopJetLag's Flight-Aligned™ planning asks when your journey will actually let you do it. StopJetLag builds your plan around the answer. ■ What Travelers and the Press Have Said Katie Couric Show: "There's a great service called StopJetLag" United Airlines Hemispheres: "The best approach is StopJetLag" Clare Vooght—iNews: "The best app by a million (air) miles...was StopJetLag" ■ StopJetLag on Your Next Trip Don't settle for jet lag advice that assumes your journey will cooperate. Start with your flights. Find your first realistic opportunity for destination-time core sleep. Coordinate what happens before it. Protect what happens after it. That's StopJetLag's Flight-Aligned™ travel planning.

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

Screenshots

StopJetLag4 screens
Timeshifter4 screens

Verdict

The call

The clearest difference is review sentiment: Timeshifter at 92% against StopJetLag's 8%. Timeshifter also leads on rating (4.7 vs 2.3) and update cadence (weekly vs every 2 months). StopJetLag's advantage is device support (3 vs 1) 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. StopJetLag sells 1 one-off in-app purchase and Timeshifter sells 3 in-app purchases, starting at $24.99 per year. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Timeshifter holds the better App Store score, 4.7 against 2.3. That said, the two scores are not equally well evidenced: Timeshifter has 2.7K ratings behind it against 12, so its average is the more settled of the two. Written reviews point the same way: 8% of StopJetLag's written reviews are positive against 92% of Timeshifter's.

UpkeepUpdate frequency

StopJetLag ships an update every 2 months, Timeshifter weekly. The most recent releases landed on October 15, 2026 and October 20, 2026 respectively.

Scorecard7 real differences · 4 level
StopJetLag versus Timeshifter: the parameters behind the verdict, then further details
ParameterStopJetLagTimeshifter
PriceFreeFree
Rating2.3 (12 ratings)4.7 (2.7K ratings) — better
Positive reviews7.7% of reviews91.8% of reviews — better
Number of ratings122.7K — better
Update frequencyEvery 2 monthsWeekly — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
Best chart rank—#31 — better
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.0 — better17.0
Further details — not scored
Size24 MB62 MB
Age rating12+17+
DeveloperStopJetLagTimeshifter Inc.

Customer experience

StopJetLag

All ratings12 ratings
Positive33.3%
Neutral0.0%
Negative66.7%
Written reviews52 reviews
Positive7.7%
Neutral0.0%
Negative92.3%

Timeshifter

All ratings2,667 ratings
Positive90.8%
Neutral2.1%
Negative7.1%
Written reviews1,496 reviews
Positive91.8%
Neutral1.6%
Negative6.6%

Bugs and requests

StopJetLag

Not enough reviews yet to summarise bugs or 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

In-app purchases

1 purchases

StopJetLag

One-time1
  • Access Your StopJetLag PlanFree
3 purchases

Timeshifter

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

Questions

Is StopJetLag free?
StopJetLag is free to download, with in-app purchases available.
Is Timeshifter free?
Timeshifter is free to download, with in-app purchases available.
Which has better reviews, StopJetLag or Timeshifter?
Timeshifter is rated higher. StopJetLag averages 2.3 out of 5 from 12 ratings, while Timeshifter averages 4.7 from 2.7K ratings.
Do StopJetLag or Timeshifter have ads?
Neither StopJetLag nor Timeshifter shows ads.
Which is updated more often, StopJetLag or Timeshifter?
StopJetLag ships an update every 2 months, and Timeshifter weekly. Most recently, StopJetLag was updated on October 15, 2026 and Timeshifter on October 20, 2026.

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