Comparison

ISS Detector vs sunClock World Map

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

Head to head
About

ISS Detector

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
Read full description

Have you seen the International Space Station? It is visible with the naked eye! This is the easiest way to spot the station. ISS Detector will tell you when and where to look for the ISS. You get an alarm a few minutes before a pass. You will never miss it. ISS Detector will also check if the weather conditions are right. A clear sky is perfect for spotting. Premium will enhance the functionality of ISS Detector. With the subscription you can add many famous satellites and amateur radio satellites. See the Starlink satellite trains, Hubble space telescope, rocket bodies, Vanguard 1 and many bright satellites. Available categories in Premium: Radio Amateur Satellites: Track dozens of ham and weather satellites. Starlink: Track Starlink satellite trains. Famous Objects: Hubble Space Telescope, rocket bodies, bright satellites and more. Comets: Find comets in the night sky. You might need binoculars or a telescope to see them Planets: Find all the planets Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

sunClock World Map

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
Read full description

sunClock App: to see night shade on an equirectangular-projection of a world map. Additionally the app provides location data as sunrise and sunset as well as weather data. Therefore the app needs a location GPS access. The location data will not be used for any other purpose. With a tap on the map it is possible to display single location data of other places. It is possible to remove the Google advertisement by purchasing this app. Just click purchase in the Settings page.

Screenshots

ISS Detector4 screens
sunClock World Map4 screens

Verdict

The call

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.

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. 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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard6 real differences · 4 level
ISS Detector versus sunClock World Map: the parameters behind the verdict, then further details
ParameterISS DetectorsunClock World Map
PriceFreeFree
Rating4.6 (740 ratings) — better2.2 (5 ratings)
Positive reviews55.4% of reviews — better0.0% of reviews
Number of ratings740 — better5
Update frequencyMonthly — betterEvery 10 months
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPadiPhone, iPad
Requires iOS16.0 — better26.0
Further details — not scored
Size35 MB8 MB
Age rating4+4+
DeveloperDerk VrijdagStefan von Weihe

Customer experience

ISS Detector

All ratings740 ratings
Positive91.2%
Neutral3.9%
Negative4.9%
Written reviews186 reviews
Positive55.4%
Neutral12.9%
Negative31.7%

sunClock World Map

All ratings5 ratings
Positive20.0%
Neutral0.0%
Negative80.0%
Written reviews3 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

7 purchases

ISS Detector

Subscriptions7
  • Premium Access2 variants$0.991 Month
  • Donation$1.991 Month
  • Premium Access$1.991 Month
Show 4 more
  • Premium Access7 Days trial$2.991 Year
  • Premium Access7 Days trial$5.991 Year
  • Donation2 variants$5.991 Year
  • Premium Access7 Days trial$11.991 Year
1 purchases

sunClock World Map

One-time1
  • sunClock world map$0.99

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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