Comparison

ISS Tracker vs FlipClock Pro

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

Head to head
About

ISS Tracker

Monitor the International Space Station's live position and vital telemetry data in real-time. Track its orbit, altitude, velocity, and internal environmental systems. Ideal for space enthusiasts and students interested in space exploration.

Highlights
  • Real-time ISS position tracking
  • Interactive world map
  • Altitude and velocity data
  • Comprehensive telemetry monitoring
  • Environmental and power system data
  • Dark mode support
Features
Read full description

Find out when the International Space Station flies over you and exactly where to look. On a good night it’s brighter than any star. YOUR NEXT PASS, IN PLAIN WORDS “Tonight at 8:05 PM. Look west, low.” Each pass also says how long it’s visible and how bright it is, and has a round sky chart that shows its path, from where it appears to where it fades. See 14 days of passes, and the cloud forecast for the next ones. ALERTS FOR GOOD PASSES Get a heads-up a few hours before a good pass, and an alert 5 minutes before it starts. A good pass climbs at least 30° above the horizon, or is bright and long. If two weeks have none, you get alerts for the best low passes instead. You can turn on alerts for every visible pass in the app’s settings. A Live Activity counts down on your Lock Screen and in the Dynamic Island. FIND IT IN THE SKY Hold your phone up and follow the pointer to the station. Saw a bright, moving light? Ask “Was that the ISS?” and get a straight answer. No telescope needed. WHERE IS THE ISS RIGHT NOW? See it on a 3D globe, with the day and night sides of Earth, or on a live map with the ground track of its orbit. You can add Tiangong, China’s space station, and get its passes too. WHO’S UP THERE See the crew on board, and the next launches, dockings and spacewalks. ALWAYS ONE GLANCE AWAY Widgets show your next pass on the Home Screen and Lock Screen. A Control Center button opens the sky pointer. PRIVATE AND SIMPLE No account needed. Every pass is worked out on your phone, and your exact location is never sent to us. Apple Weather and Apple Maps use it for the cloud forecast and the place name. For iPhone and iPad.

About

FlipClock Pro

Experience a realistic split-flap digital clock on your iPhone and iPad. Customize themes, fonts, and colors, and set multiple clocks with different timezones. Includes countdown, alarm, and Pomodoro timers.

Highlights
  • Realistic flip animation
  • Customizable themes and colors
  • Multiple font styles
  • Up to 4 clocks with different timezones
  • Countdown timer
  • Alarm function
  • Pomodoro timer
Features
Read full description

FlipClock Pro brings the classic split-flap display back to your iPhone and iPad. ONE-TIME PURCHASE No subscription. No ads. No in-app purchases. Buy it once, own it forever. A CLOCK THAT FITS YOUR DESK - Realistic flip animation for every digit - 5 built-in themes (Classic, Amber, Teal, Red, Midnight) plus a full custom color picker for both the card face and background - 3 font styles — system, monospaced, rounded - 12h or 24h display, with or without seconds UP TO 4 CLOCKS AT ONCE Track home and away in one glance. Add up to four clocks, each with its own timezone, label, and time format. Searchable picker shows live local time for every city as you browse. MORE THAN A CLOCK - Countdown timer — count down to any date with a full flip-card display - Alarm — wake up to the same split-flap style you see all day - Pomodoro timer — stay focused with a themed work/break cycle Built entirely with Apple's frameworks. No trackers, no analytics, no data ever leaves your device.

Screenshots

ISS Tracker4 screens
FlipClock Pro4 screens

Verdict

The call

The clearest difference is price: ISS Tracker at Free against FlipClock Pro's $0.99. FlipClock Pro's advantage is iOS requirement (17.0 vs 26.0). On review sentiment, update cadence, ads and in-app purchases 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

ISS Tracker is free to download; FlipClock Pro costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

ISS Tracker ships an update weekly, FlipClock Pro every 2 weeks. The most recent releases landed on October 24, 2026 and October 13, 2026 respectively.

Scorecard3 real differences · 7 level
ISS Tracker versus FlipClock Pro: the parameters behind the verdict, then further details
ParameterISS TrackerFlipClock Pro
PriceFree — better$0.99
Rating4.7 (19 ratings) — better—
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings19 — better—
Update frequencyWeekly — betterEvery 2 weeks
AdsNoNo
In-app purchasesNoNo
MonetizationFree — betterPaid
DevicesiPhone, iPadiPhone, iPad
Requires iOS26.017.0 — better
Further details — not scored
Size15 MB3 MB
Age rating4+4+
DeveloperLucent Enterprises Ltd.Onkar Adesh Nirhali

Customer experience

ISS Tracker

All ratings17 ratings
Positive94.1%
Neutral0.0%
Negative5.9%
Written reviews3 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

FlipClock Pro

Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

ISS Tracker

No in-app purchases

None

FlipClock Pro

No in-app purchases

Questions

Is ISS Tracker free?
ISS Tracker is free to download, with no in-app purchases.
Is FlipClock Pro free?
FlipClock Pro costs $0.99, with no in-app purchases.
Do ISS Tracker or FlipClock Pro have ads?
Neither ISS Tracker nor FlipClock Pro shows ads.
Which is updated more often, ISS Tracker or FlipClock Pro?
ISS Tracker ships an update weekly, and FlipClock Pro every 2 weeks. Most recently, ISS Tracker was updated on October 24, 2026 and FlipClock Pro on October 13, 2026.

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