Comparison

Time.is vs Satellite Tracker by Star Walk

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

Head to head
About

Time.is

Get the exact current time for any time zone with high accuracy, synchronized to atomic clocks. Features include instant time conversion, a world clock with millions of locations, and an up-to-date time zone database. It also provides sunrise/sunset times, day length, and a calendar with interval calculations.

Highlights
  • Atomic clock synchronization
  • Instant time conversion
  • World clock with 7 million locations
  • Up-to-date time zone database
  • Sunrise/sunset and day length
  • Calendar with interval calculation
Read full description

Time.is gives you extremely accurate time for any time zone. Features: - Synchronization to atomic clock time with an accuracy down to ±5 milliseconds - Instant time conversion/meeting planner/world clock with 7 million locations - Always up-to-date time zone database, automatically adjusted when time zone rules are changed - 44 languages - Sunrise time, sunset time and day length - Beautiful calendar with interval calculation - Word clock - Dark/light mode - Several time and date formats (seconds on/off, 12/24 hour mode) - Intuitive, gesture driven interface - Elegant, minimalistic design - Designed to take advantage of large iPad screens - Looks great in both portrait and landscape format - Small file size - Works offline (except synchronization and search) - No ads This app synchronizes to the web site Time.is, which is a favorite among clock collectors and time enthusiasts. Time.is was nominated for the Webby Awards in 2012 (Best Visual Design - Function), and has been featured by Mashable, Lifehacker and Hackernews.

About

Satellite Tracker by Star Walk

Track satellites in real-time, including the ISS and Starlink. Get predictions for upcoming passes and set alerts. Explore satellite orbits and trajectories with various viewing modes.

Highlights
  • Real-time satellite tracking
  • Satellite flyby timer
  • Pass predictions
  • Customizable location
  • Fly-with-satellite view
  • Satellite orbit over Earth
Features
Read full description

Observe the International Space Station in the sky above you and find out where human-made satellites are right now with SATELLITE TRACKER by STAR WALK! MAIN FEATURES - Real-time satellite tracking - The most outstanding satellites - Satellite flyby timer & pass predictions - Hand-picked passes & customizable location - Fly-with-satellite view - Satellite orbit over Earth Enjoy the easy and comfortable real-time satellite tracking with SATELLITE TRACKER! ► Select a satellite from the list and see its current location in the sky in real-time or track satellite live orbiting Earth. You can track the most famous and brightest satellites, SpaceX’s Stalinks, communications and weather forecasting satellites, and much more! ► At the top of the main screen, the flyby timer counts the amount of time left until the next flyby of the selected satellite over your location. Tap the down arrow to open the list of passes that will be visible from your location in the nearest future. ► Get precise predictions when satellites are visible in the sky above your location. The list of passes allows you to set any alert (one or more) for the satellite's pass that you’d like to witness. Switch between the app’s modes (Globe view, Satellite View, and Sky view) by tapping the round icons at the bottom of the screen. -> Choose Satellite View to enjoy the 3D image of a satellite flying over Earth with the real speed and location. -> Globe view allows you to see a satellite’s trajectory around the Earth's 3D model and on the Earth’s map. -> Find the satellites in the sky by following the arrow pointer with the Sky View mode. The app contains ads. The ISS is available by default. With SATELLITES LIVE subscription, you get an instant ad-free access to tracking satellites live orbiting over Earth and in the sky, the timer for the next appearance, and alerts about the nearest flybys. SATELLITES LIVE is a renewable subscription with a 1-week FREE trial that gives you access to content from within the app on an ongoing basis. Payment will be charged to your iTunes account. At the end of each subscription duration (1 month), the subscription will automatically renew until you choose to cancel it, and your account will be charged for renewal 24 hours before the end of the current period. Users can manage their subscriptions in their account settings on the App Store. Privacy policy: https://vitotechnology.com/privacy-policy.html Terms of use: https://vitotechnology.com/terms-of-use.html Never miss satellites passing by in the sky with SATELLITE TRACKER!

Screenshots

Satellite Tracker by Star Walk4 screens

Verdict

The call

The clearest difference is price: Satellite Tracker by Star Walk at Free against Time.is's $1.99. Satellite Tracker by Star Walk also leads on ratings volume (70K vs 38) and device support (3 vs 1). Time.is's advantage is in-app purchases (none vs 10) and ads (none vs shown). On rating 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

Satellite Tracker by Star Walk is free to download; Time.is costs $1.99 up front. Satellite Tracker by Star Walk sells 10 in-app purchases, starting at $0.49 per month. Time.is asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.5 for Time.is against 4.6 for Satellite Tracker by Star Walk. That said, the two scores are not equally well evidenced: Satellite Tracker by Star Walk has 70K ratings behind it against 38, so its average is the more settled of the two. Written reviews are what separate them: 68% of Time.is's written reviews are positive against 58% of Satellite Tracker by Star Walk's.

UpkeepUpdate frequency

Time.is ships an update every 3 weeks, Satellite Tracker by Star Walk every 2 months. The most recent releases landed on November 1, 2026 and November 4, 2026 respectively.

Scorecard9 real differences · 1 level
Time.is versus Satellite Tracker by Star Walk: the parameters behind the verdict, then further details
ParameterTime.isSatellite Tracker by Star Walk
Price$1.99Free — better
Rating4.5 (38 ratings)4.6 (70K ratings) — better
Positive reviews67.6% of reviews — better57.7% of reviews
Number of ratings3870K — better
Update frequencyEvery 3 weeks — betterEvery 2 months
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPadiPhone, iPad, iPod — better
Requires iOS12.0 — better15.0
Further details — not scored
Size11 MB331 MB
Age rating4+4+
DeveloperEven ScharningVito Technology Inc.

Customer experience

Time.is

All ratings38 ratings
Positive86.8%
Neutral2.6%
Negative10.5%
Written reviews71 reviews
Positive67.6%
Neutral5.6%
Negative26.8%

Satellite Tracker by Star Walk

All ratings70,274 ratings
Positive91.1%
Neutral4.0%
Negative4.9%
Written reviews574 reviews
Positive57.7%
Neutral8.5%
Negative33.8%

User reviews

Time.is

From 38 App Store ratings

What we love

  • ✨ Accurate time display
  • 🌍 Global time zone support
  • 👍 Intuitive interface design
  • ⏱️ Precise second-level timing
  • 💻 Useful website counterpart

Room to improve

  • ❌ Incompatible with newer iPads/iOS
  • 🐛 Frequent bugs and glitches
  • 💸 Not worth the price
  • ⏳ Lack of recent updates
  • 🖱️ Poor navigation/usability issues

Satellite Tracker by Star Walk

From 70K App Store ratings

What we love

  • 🚀 Easy to use
  • 🔭 Excellent for tracking ISS
  • 🌍 Impressive 3D graphics
  • 👍 Helpful for stargazing with kids
  • 🔍 Useful for identifying satellites

Room to improve

  • 💰 Subscription model too restrictive
  • 🔍 Limited satellite tracking options
  • 🕰️ Inaccurate pass timing notifications
  • 🔌 Requires internet connection
  • 🔍 Difficult to find and track specific satellites

Bugs and requests

Time.is

Reported bugs

21 issues
  • Doesn't work on iPads/iOS
  • App crashes
  • Cannot add countries
  • Cannot scroll
  • Location detection issues
Show 16 more
  • Time display is erroneous
  • Pop ads cause glitches on website
  • App is gimmicky and worthless
  • Doesn't work with new iOS and iPads
  • Out of date
  • App will not load on Pro iPad model
  • Error message about developer needing to update
  • Crashes in IpadOS14
  • Can't detect precise location
  • Displayed time is erroneous
  • Doesn't work properly anymore
  • Doesn't offer much over URL version
  • Never seems to get updates
  • Off by an hour
  • Cannot close a menu
  • Doesn't know where I live

Requested features

5 requests
  • iPhone version
  • Update for new iOS/iPadOS
  • Customization options (e.g., hundredths of a second)
  • Ability to delete locations
  • Alarm activation outside the app

Satellite Tracker by Star Walk

Reported bugs

3 issues
  • Unsubscribe button not working
  • Compass issues causing incorrect orientation
  • Occasional crashes and freezes

Requested features

5 requests
  • Add more satellite tracking options
  • Improve pass timing accuracy
  • Provide offline mode for remote use
  • Allow tracking of HAM radio satellites
  • Add more detailed satellite information

In-app purchases

None

Time.is

No in-app purchases

10 purchases

Satellite Tracker by Star Walk

Subscriptions8
  • Real Time Satellite Tracking7 Days trial$0.491 Month
  • Satellite Tracker Premium: 1m$0.991 Month
  • Real Time Satellite Tracking7 Days trial$0.993 Months
Show 5 more
  • Satellite Tracker Premium: 1m$1.991 Month
  • Satellite Tracker Premium: 1m3 Days trial$1.991 Month
  • Satellite Tracker Premium: 1y$5.991 Year
  • Satellite Tracker Premium: 1y$7.991 Year
  • Satellite Tracker Premium: 1y3 Days trial$7.991 Year
One-time2
  • Lifetime Premium Access Sale$4.99
  • Lifetime Premium Access$9.99

Questions

Is Time.is free?
Time.is costs $1.99, with no in-app purchases.
Is Satellite Tracker by Star Walk free?
Satellite Tracker by Star Walk is free to download, with in-app purchases available.
Which has better reviews, Time.is or Satellite Tracker by Star Walk?
Satellite Tracker by Star Walk is rated higher. Time.is averages 4.5 out of 5 from 38 ratings, while Satellite Tracker by Star Walk averages 4.6 from 70K ratings.
Do Time.is or Satellite Tracker by Star Walk have ads?
Satellite Tracker by Star Walk shows ads; Time.is does not.
Which is updated more often, Time.is or Satellite Tracker by Star Walk?
Time.is ships an update every 3 weeks, and Satellite Tracker by Star Walk every 2 months. Most recently, Time.is was updated on November 1, 2026 and Satellite Tracker by Star Walk on November 4, 2026.

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