Comparison

Timeshifter vs Skyline Cabs

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

Skyline Cabs

Book a taxi directly through this app for convenient travel within Barcelona. Choose your ride, pay quickly in-app, and complete your journey safely. The app offers a user-friendly experience for on-demand transportation.

Highlights
  • Direct taxi booking
  • In-app payment
  • Safe trip completion
  • User control over ride choice
  • Available in Barcelona
Features
Read full description

ABOUT THIS APP Taxi Booking App SKYLINE Cabs is largest taxi booking app, currently available in BARCELONA. Book Taxi directly through the app and get there your way. You are in control to choose how you roll, book easily, pay in-app quickly and complete your trip safely!

Screenshots

Timeshifter4 screens
Skyline Cabs3 screens

Verdict

The call

The clearest difference is in-app purchases: Skyline Cabs at none against Timeshifter's 3. Skyline Cabs also leads on review sentiment (100% vs 92%) and device support (3 vs 1). Timeshifter's advantage is update cadence (weekly vs every 6 weeks) and chart position (#24 vs unranked). On price and ads 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. Skyline Cabs asks for nothing beyond the download.

UpkeepUpdate frequency

Timeshifter ships an update weekly, Skyline Cabs every 6 weeks. The most recent releases landed on November 8, 2026 and November 4, 2026 respectively.

Scorecard7 real differences · 4 level
Timeshifter versus Skyline Cabs: the parameters behind the verdict, then further details
ParameterTimeshifterSkyline Cabs
PriceFreeFree
Rating4.7 (2.7K ratings) — better—
Positive reviews91.8% of reviews100.0% of reviews — better
Number of ratings2.7K — better—
Update frequencyWeekly — betterEvery 6 weeks
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
Best chart rank#24 — better—
DevicesiPhoneiPhone, iPad, iPod — better
Requires iOS17.013.0 — better
Further details — not scored
Size62 MB38 MB
Age rating17+4+
DeveloperTimeshifter Inc.Skyline Taxi

Customer experience

Timeshifter

All ratings2,671 ratings
Positive90.8%
Neutral2.1%
Negative7.2%
Written reviews1,518 reviews
Positive91.8%
Neutral1.6%
Negative6.5%

Skyline Cabs

Written reviews3 reviews
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

Skyline Cabs

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
None

Skyline Cabs

No in-app purchases

Questions

Is Timeshifter free?
Timeshifter is free to download, with in-app purchases available.
Is Skyline Cabs free?
Skyline Cabs is free to download, with no in-app purchases.
Do Timeshifter or Skyline Cabs have ads?
Neither Timeshifter nor Skyline Cabs shows ads.
Which is updated more often, Timeshifter or Skyline Cabs?
Timeshifter ships an update weekly, and Skyline Cabs every 6 weeks. Most recently, Timeshifter was updated on November 8, 2026 and Skyline Cabs on November 4, 2026.

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