# ISS Detector vs sunClock World Map

The clearest difference is review sentiment: ISS Detector at 55% against sunClock World Map's 0%. ISS Detector also leads on rating (4.6 vs 2.2) and update cadence (monthly vs every 10 months). sunClock World Map's advantage is ads (none vs shown). On price, in-app purchases, monetization model and device support there is nothing between them.

Both are free to download. ISS Detector sells 7 in-app purchases, starting at $0.99 per month and sunClock World Map sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

ISS Detector holds the better App Store score, 4.6 against 2.2. That said, the two scores are not equally well evidenced: ISS Detector has 740 ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 55% of ISS Detector's written reviews are positive against 0% of sunClock World Map's.

ISS Detector ships an update monthly, sunClock World Map every 10 months. The most recent releases landed on November 6, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | ISS Detector | sunClock World Map |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (740 ratings)](https://appshunter.io/ios/app/iss-detector/id1198597805/reviews)** | [2.2 (5 ratings)](https://appshunter.io/ios/app/sunclock-world-map/id1578018980/reviews) |
| Number of ratings | **740** | 5 |
| Positive reviews | **55.4% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Monthly** | Every 10 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 35 MB | 8 MB |
| Requires iOS | **16.0** | 26.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Derk Vrijdag](https://appshunter.io/developer/1198597804) | [Stefan von Weihe](https://appshunter.io/developer/1493458328) |

## What reviewers say

### ISS Detector

[App page](https://appshunter.io/ios/app/iss-detector/id1198597805)

Easily track the International Space Station and other satellites. Receive timely alarms before passes and get weather condition checks for optimal viewing. Enhance functionality with optional in-app purchases to discover more celestial objects.

**Highlights:** ISS tracking and alerts, Weather condition checks, Alarm notifications, Track Starlink trains, Track Hubble telescope, Track amateur radio satellites

**Features:** macOS Compatibility, Family Sharing, Vision Pro support

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Access | $0.99 | per month |
| Donation | $1.99 | per month |
| Premium Access | $1.99 | per month |
| Premium Access | $2.99 | per year |
| Premium Access | $5.99 | per year |
| Donation | $5.99 | per year |
| Premium Access | $11.99 | per year |


### sunClock World Map

[App page](https://appshunter.io/ios/app/sunclock-world-map/id1578018980)

Visualize global night and day cycles on an equirectangular world map. Get sunrise, sunset, and weather data for any location. Tap the map to view specific place details.

**Highlights:** World map with night shade visualization, Sunrise and sunset times, Location-specific weather data, Tap to view individual location data, GPS location access for data

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| sunClock world map | $0.99 | one-time |


## Frequently asked questions

### Is ISS Detector free?

ISS Detector is free to download, with in-app purchases available.

### Is sunClock World Map free?

sunClock World Map is free to download, with in-app purchases available.

### Which has better reviews, ISS Detector or sunClock World Map?

ISS Detector is rated higher. ISS Detector averages 4.6 out of 5 from 740 ratings, while sunClock World Map averages 2.2 from 5 ratings.

### Do ISS Detector or sunClock World Map have ads?

ISS Detector shows ads; sunClock World Map does not.

### Which is updated more often, ISS Detector or sunClock World Map?

ISS Detector ships an update monthly, and sunClock World Map every 10 months. Most recently, ISS Detector was updated on November 6, 2026 and sunClock World Map on November 3, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*