Comparison

ISS Online vs Solar System Viewer

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

Head to head

Simulate planetary orbits

$2.99

📚 Education

★ 4.428 ratingsView app →

About

ISS Online

Explore life aboard the International Space Station with live HD video streams of Earth. Track the station's position, view crew information, and take a virtual tour. Stay updated on ISS activities and its Twitter feed.

Highlights

Live HD camera stream
ISS location tracking
Crew member information
Virtual station tour
Official ISS Twitter feed

Features

Read full description

The application is useful to all who are interested in life on the international space station. Functions: - Live HD camera - a beautiful HD video streaming of our planet - ISS Tracker: speed, altitude, coordinates, time until sunrise/sunset - ISS Crew - ISS Virtual tour - ISS Twitter

About

Solar System Viewer

Explore and simulate the orbits of planets in our solar system. This app allows you to speed up or slow down time, travel to any date, and view planetary positions. It also offers widgets for your home screen and Apple Watch complications.

Highlights

Simulate planetary orbits
Adjust time speed
Time travel to specific dates
Home screen widgets
Apple Watch integration
View planet overviews

Features

Read full description

8Planets is a simple viewer and simulator for planetary orbits in our Solar System. 8Planets helps you discover how the planets aligned and move around over time so that you feel the scale of the Solar System or even the Universe. By giving you quick and easy access to the Solar System everywhere, 8Planets will make you feel that the Solar System is close to us. FEATURES ・Planetary Motion Speed up or slow down time to see how the planets rotate over time and grasp the scale of the Solar System. ・Time Travel Travel back or forward in time to view the Solar System or planetary positions on any given date. ・Widgets Widgets allow you to display the real-time Solar System on your Home Screen. ・Watch View the Solar System on your wrist and use Digital Crown to travel back or forward in time. ・Others Apple Watch Complications, Overview of the planets, Option to show Pluto, Sharing your favorite moment of the Solar System, URL Scheme, and more.

Screenshots

ISS Online4 screens

Solar System Viewer3 screens

Verdict

The call

The clearest difference is in-app purchases: ISS Online at none against Solar System Viewer's 4. ISS Online also leads on price ($1.99 vs $2.99) and iOS requirement (16.0 vs 26.0). Solar System Viewer's advantage is review sentiment (83% vs 50%) and device support (4 vs 2). On update cadence, ads and monetization model 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 Online costs $1.99 and Solar System Viewer $2.99 up front. Solar System Viewer sells 4 one-off in-app purchases. ISS Online asks for nothing beyond the download.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

Scorecard5 real differences · 5 level

ISS Online versus Solar System Viewer: the parameters behind the verdict, then further details
Parameter	ISS Online	Solar System Viewer
Price	$1.99 — better	$2.99
Rating	—	4.4 (28 ratings) — better
Positive reviews	50.0% of reviews	83.3% of reviews — better
Number of ratings	—	28 — better
Update frequency	Every 2 months	Every 2 months
Ads	No	No
In-app purchases	No — better	Yes
Monetization	Paid	Paid
Devices	iPhone, iPad	iPhone, iPad, Mac, Apple Watch — better
Requires iOS	16.0 — better	26.0
Further details — not scored
Size	7 MB	22 MB
Age rating	4+	4+
Developer	Pavel Koyushev	BLUE COMET LABS LLC

Customer experience

ISS Online

Written reviews2 reviews

Positive50.0%

Neutral50.0%

Negative0.0%

Solar System Viewer

All ratings28 ratings

Positive85.7%

Neutral3.6%

Negative10.7%

Written reviews6 reviews

Positive83.3%

Neutral16.7%

Negative0.0%

In-app purchases

None

ISS Online

No in-app purchases

4 purchases

Solar System Viewer

One-time4

Io Tip$1.99
Europa Tip$3.99
Ganymede Tip$5.99

Show 1 more

Callisto Tip$9.99

Questions

Is ISS Online free?

ISS Online costs $1.99, with no in-app purchases.

Is Solar System Viewer free?

Solar System Viewer costs $2.99, and also offers in-app purchases.

Do ISS Online or Solar System Viewer have ads?

Neither ISS Online nor Solar System Viewer shows ads.

Which is updated more often, ISS Online or Solar System Viewer?

ISS Online ships an update every 2 months, and Solar System Viewer every 2 months. Most recently, ISS Online was updated on November 2, 2026 and Solar System Viewer on November 3, 2026.