Comparison

Alien Planets vs Astris

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

Head to head

About

Alien Planets

Features

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Get all the information about these amazing new worlds that may host alien life and be a home for humanity in future. New discovered planets are automatically added so you get the very latest discovers, facts and data continuously. The perfect app for all astronomy enthusiasts, students, sky watchers and all people who want to discover beyond deep space. Synchronised with latest data from NASA

About

Astris

Features

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This app allows to you discover our solar system with every planet, moons and asteroids and add it to your favorites. You will be able to have a 3d experience with the planets and the sun. Every text is accessible thanks to the speak screen.

Screenshots

Alien Planets2 screens

Astris4 screens

Verdict

The call

The clearest difference is price: Astris at Free against Alien Planets's $9.99. Astris also leads on update cadence (every 3 months vs every 27 months) and iOS requirement (15.0 vs 18.2). On 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

Astris is free to download; Alien Planets costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Alien Planets ships an update every 27 months, Astris every 3 months. Both last shipped on September 27, 2026.

Scorecard3 real differences · 3 level

Alien Planets versus Astris: the parameters behind the verdict, then further details
Parameter	Alien Planets	Astris
Price	$9.99	Free — better
Update frequency	Every 27 months	Every 3 months — better
Ads	No	No
In-app purchases	No	No
Devices	iPhone, iPad	iPhone, iPod
Requires iOS	18.2	15.0 — better
Further details — not scored
Size	34 MB	21 MB
Age rating	4+	4+
Developer	Jose Leal	ISTITUTI EDMONDO DE AMICIS SRL

In-app purchases

None

Alien Planets

No in-app purchases

None

Astris

No in-app purchases

Questions

Is Alien Planets free?

Alien Planets costs $9.99, with no in-app purchases.

Is Astris free?

Astris is free to download, with no in-app purchases.

Do Alien Planets or Astris have ads?

Neither Alien Planets nor Astris shows ads.

Which is updated more often, Alien Planets or Astris?

Alien Planets ships an update every 27 months, and Astris every 3 months. Most recently, Alien Planets was updated on September 27, 2026 and Astris on September 27, 2026.