Comparison

Astris vs Project Planet Space

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

Head to head
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.ย  You will be able to have a 3d experience with the planets and the sun. Every text is accessible thanks to the speak screen.

About

Project Planet Space

Features
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Project Planet - an interactive map of our solar system How much would you weigh on Jupiter? Why does a day on Mercury last longer than its year? Project Planet turns space facts into a fingertip-sized journey. Scroll through all nine planets (Pluto included), feel each world's pull on your own body, and explore the numbers astronomers have spent decades collecting. Highlights - Sticky scroll across the system: from Mercury to Pluto, each planet stays centred long enough for you to take it in. - You, on every world: enter your weight and age once and watch them recalculated by each planet's gravity and orbital period. - Five rich widgets per planet: surface temperature with reference markers (Antarctica, freezing, boiling), atmospheric pressure with composition chart, travel times from Earth from walking up to the speed of light, gravitational force with everyday objects (phone, backpack, car), and an interactive pressure simulator with phase changes for water, oxygen, CO2, hydrogen, nitrogen and mercury (Antoine equation under the hood). - Six languages: Czech, English, German, Slovak, Spanish and French, auto-detected from your device. - Metric or imperial: switch instantly; weights, temperatures and distances follow your preference. - Crafted to feel like a small cosmic museum: dark cosmic theme, hand-tuned typography, subtle scroll choreography, and a right rail that lets you jump to any planet. - Built on real data: gravitational accelerations, orbital periods, NASA mean temperatures, atmospheric compositions and substance phase transitions. Requires an internet connection. The app runs as a continuously updated webview and uses native iOS capabilities such as haptic feedback to add a tactile dimension to your interstellar journey.

Screenshots

Astris4 screens
Project Planet Space4 screens

Verdict

The call

The clearest difference is update cadence: Astris at every 3 months against Project Planet Space's every 25 months. On price, ads, in-app purchases and device support there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Astris ships an update every 3 months, Project Planet Space every 25 months. The most recent releases landed on September 27, 2026 and September 11, 2026 respectively.

Scorecard1 real difference ยท 5 level
Astris versus Project Planet Space: the parameters behind the verdict, then further details
ParameterAstrisProject Planet Space
PriceFreeFree
Update frequencyEvery 3 months โ€” betterEvery 25 months
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPodiPhone, iPad, iPod โ€” better
Requires iOS15.015.0
Further details โ€” not scored
Size21 MB2 MB
Age rating4+4+
DeveloperISTITUTI EDMONDO DE AMICIS SRLMiroslav Hanzelka

In-app purchases

None

Astris

No in-app purchases

None

Project Planet Space

No in-app purchases

Questions

Is Astris free?
Astris is free to download, with no in-app purchases.
Is Project Planet Space free?
Project Planet Space is free to download, with no in-app purchases.
Do Astris or Project Planet Space have ads?
Neither Astris nor Project Planet Space shows ads.
Which is updated more often, Astris or Project Planet Space?
Astris ships an update every 3 months, and Project Planet Space every 25 months. Most recently, Astris was updated on September 27, 2026 and Project Planet Space on September 11, 2026.

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