Comparison

Chronos Logger vs ISS Tracker

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

Head to head
About

Chronos Logger

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Universal stopwatch and countdown on your iPhone, iPad, or Mac. Quickly capture a moment as stopwatch event or create a countdown to future event. Easy and user-friendly to edit and modify event's name, begin and end timestamps. Quick access to events organised into categories: In Progress, Future, Completed, and All. Fast searching through events stored locally on device. Sample usages include: - track events as they happen - record operational time, i.e. time your spacewalk sessions - countdown how-long to important future events - record your daily work hours - record your reconnaissance 'recon' mission, i.e. time your suspect's activities, etc

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
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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.

Screenshots

Chronos Logger4 screens
ISS Tracker4 screens

Verdict

The call

The clearest difference is update cadence: ISS Tracker at weekly against Chronos Logger's fortnightly. Chronos Logger's advantage is iOS requirement (16.4 vs 26.0). On price, ads, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Chronos Logger ships an update fortnightly, ISS Tracker weekly. The most recent releases landed on October 15, 2026 and October 16, 2026 respectively.

Scorecard2 real differences · 8 level
Chronos Logger versus ISS Tracker: the parameters behind the verdict, then further details
ParameterChronos LoggerISS Tracker
PriceFreeFree
Rating—4.7 (17 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—17 — better
Update frequencyFortnightlyWeekly — better
AdsNoNo
In-app purchasesNoNo
Monetization—Free
DevicesiPhone, iPad, Mac — betteriPhone, iPad
Requires iOS16.4 — better26.0
Further details — not scored
Size1 MB15 MB
Age rating4+4+
DeveloperAce AUTHORSLucent Enterprises Ltd.

In-app purchases

None

Chronos Logger

No in-app purchases

None

ISS Tracker

No in-app purchases

Questions

Is Chronos Logger free?
Chronos Logger is free to download, with no in-app purchases.
Is ISS Tracker free?
ISS Tracker is free to download, with no in-app purchases.
Do Chronos Logger or ISS Tracker have ads?
Neither Chronos Logger nor ISS Tracker shows ads.
Which is updated more often, Chronos Logger or ISS Tracker?
Chronos Logger ships an update fortnightly, and ISS Tracker weekly. Most recently, Chronos Logger was updated on October 15, 2026 and ISS Tracker on October 16, 2026.

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