Comparison

JetShift vs Jet Lag Engine

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

Head to head
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

About

Jet Lag Engine

Features
Read full description

Jet Lag Engine turns a time-zone shift into one practical travel timeline. Enter your itinerary and usual sleep, then see what to do now, what comes next, and why each recommendation exists. The deterministic engine plans useful sleep opportunities, correctly timed light or low-light periods, and optional caffeine cutoffs before planned sleep. Built for real itineraries: • Search 7,884 airports by city or IATA code • Enter each departure and arrival in airport-local time • Add multiple ordered layovers • Choose gradual destination adjustment or staying nearer home time • Mark fixed intervals when sleep is impossible • Record recent sleep and wake times to adjust the estimate • Log coffee for cutoff feedback; melatonin remains record-only • Follow Now and a day-by-day timeline across time zones • Receive optional local notifications with quiet hours • Keep the current plan visible in small and medium widgets • Use a travel-window Live Activity during the journey • Keep trip history, duplicate plans, and export plan data • Works offline with no account, ads, analytics, or subscription Airport search, daylight feasibility, plan generation, notifications, widgets, and Live Activities work on the device. Your information leaves only when you explicitly share an export. Jet Lag Engine estimates body-clock timing from the sleep information you provide. It does not measure biological phase or guarantee alertness or recovery. Guidance is general and educational, not medical advice.

Screenshots

JetShift4 screens
Jet Lag Engine4 screens

Verdict

The call

The clearest difference is in-app purchases: Jet Lag Engine at none against JetShift's 3. JetShift's advantage is iOS requirement (15.0 vs 17.0). On price, ads and device support 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. JetShift sells 3 in-app purchases, starting at $4.99 per month. Jet Lag Engine asks for nothing beyond the download.

Scorecard2 real differences · 7 level
JetShift versus Jet Lag Engine: the parameters behind the verdict, then further details
ParameterJetShiftJet Lag Engine
PriceFreeFree
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyFortnightly—
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreemium—
DevicesiPhone, iPod — betteriPhone
Requires iOS15.0 — better17.0
Further details — not scored
Size71 MB4 MB
Age rating17+4+
DeveloperJannik ObenhoffDennis Van Dalen

In-app purchases

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
None

Jet Lag Engine

No in-app purchases

Questions

Is JetShift free?
JetShift is free to download, with in-app purchases available.
Is Jet Lag Engine free?
Jet Lag Engine is free to download, with no in-app purchases.
Do JetShift or Jet Lag Engine have ads?
Neither JetShift nor Jet Lag Engine shows ads.

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