Comparison

Cosmos 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

Cosmos

Explore our solar system with realistic 3D models of planets. Discover detailed information about atmospheric compositions, surface features, and fascinating facts. An interactive journey for space enthusiasts and curious learners.

Highlights
  • Realistic 3D planet models
  • Detailed atmospheric and surface information
  • Captivating animations
  • Engaging exploration interface
  • Fascinating space facts
Features
Read full description

Of course, here is a more detailed description for the Cosmos app: "Embark on an immersive journey through the depths of the solar system with Cosmos, an interactive exploration app that brings the wonders of space to your fingertips. Featuring realistic 3D models of planets, Cosmos allows you to explore the unique features of each celestial body in stunning detail. With vibrant visuals and captivating animations, this app provides a window into the unknown aspects of our solar system. Delve into the atmospheric compositions, surface features, and fascinating facts about each planet as you navigate through Cosmos. Whether you're a space enthusiast or a curious learner, Cosmos offers a comprehensive experience that enriches your understanding of astronomy. Download Cosmos now and unlock the mysteries of the cosmos with a rich collection of 3D models, detailed information, and an engaging exploration interface."

About

Project Planet Space

Features
Read full description

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

Cosmos4 screens
Project Planet Space4 screens

Verdict

The call

The clearest difference is update cadence: Cosmos at daily against Project Planet Space's every 25 months. Project Planet Space's advantage is device support (3 vs 1) and iOS requirement (15.0 vs 17.0). On price, ads and in-app purchases 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

Cosmos ships an update daily, Project Planet Space every 25 months. The most recent releases landed on June 1, 2026 and May 16, 2026 respectively.

Scorecard3 real differences ยท 5 level
Cosmos versus Project Planet Space: the parameters behind the verdict, then further details
ParameterCosmosProject Planet Space
PriceFreeFree
Positive reviews100.0% of reviewsโ€”
Update frequencyDaily โ€” betterEvery 25 months
AdsNoNo
In-app purchasesNoNo
MonetizationFreeโ€”
DevicesiPhoneiPhone, iPad, iPod โ€” better
Requires iOS17.015.0 โ€” better
Further details โ€” not scored
Size67 MB2 MB
Age rating4+4+
DeveloperSalih Yusuf GoktasMiroslav Hanzelka

In-app purchases

None

Cosmos

No in-app purchases

None

Project Planet Space

No in-app purchases

Questions

Is Cosmos free?
Cosmos 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 Cosmos or Project Planet Space have ads?
Neither Cosmos nor Project Planet Space shows ads.
Which is updated more often, Cosmos or Project Planet Space?
Cosmos ships an update daily, and Project Planet Space every 25 months. Most recently, Cosmos was updated on June 1, 2026 and Project Planet Space on May 16, 2026.

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