Chronos Logger vs ISS Tracker
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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
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.
- Real-time ISS position tracking
- Interactive world map
- Altitude and velocity data
- Comprehensive telemetry monitoring
- Environmental and power system data
- Dark mode support
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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
Verdict
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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Chronos Logger ships an update fortnightly, ISS Tracker weekly. The most recent releases landed on October 15, 2026 and October 16, 2026 respectively.
| Parameter | Chronos Logger | ISS Tracker |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.7 (17 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 17 — better |
| Update frequency | Fortnightly | Weekly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad, Mac — better | iPhone, iPad |
| Requires iOS | 16.4 — better | 26.0 |
| Further details — not scored | ||
| Size | 1 MB | 15 MB |
| Age rating | 4+ | 4+ |
| Developer | Ace AUTHORS | Lucent Enterprises Ltd. |
In-app purchases
Chronos Logger
No in-app purchases
ISS Tracker
No in-app purchases
Questions
Is Chronos Logger free?
Is ISS Tracker free?
Do Chronos Logger or ISS Tracker have ads?
Which is updated more often, Chronos Logger or ISS Tracker?
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