HandyPlanet vs COSMOS
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
HandyPlanet
Explore the solar system in stunning 3D. Select planets like Earth or Mars to view them as interactive globes and learn key facts about their size, orbit, and moons. An engaging and simple educational tool for space enthusiasts.
- 3D planet models
- Rotatable globes
- Planet facts (size, distance, day/year length)
- Information on moons
- Interactive solar system exploration
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Bring the solar system to your fingertips in vivid 3D. Choose a planet—Earth, Mars, Jupiter, Saturn, Venus, or Mercury—tap to view it as a rotatable globe, and explore short facts about size, distance from the Sun, day and year length, and moons. A simple, educational way for anyone to discover the planets.
COSMOS
Explore a real-time 3D model of the solar system, accurately depicting planet positions based on orbital mechanics. Zoom in on celestial bodies, control time to view past or future sky events, and learn details about each planet. This app offers an ad-free, offline experience with a one-time purchase.
- Real-time planet and moon positions
- Scrub through time for past/future views
- Photo-realistic textures
- Adjustable time scale
- Free exploration with pinch and swipe
- Detailed information on celestial bodies
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COSMOS is a solar system you hold in your hand. This is not a decoration. Every planet sits exactly where it is right now, computed from real orbital mechanics. Where is Jupiter tonight? How are Saturn's rings tilted? Open the app — the answer is there. - REAL ORBITS Positions of all 8 planets and the Moon are computed from Keplerian orbital elements in real time. Scrub through time to see the sky 10 years from now — or the day you were born. - PHOTO-REAL TEXTURES Saturn's rings, Jupiter's Great Red Spot, sunspots and solar granulation — every texture is generated on your device and stays crisp as you zoom. - CONTROL TIME From one second = hours, to one second = years. Watch the Moon change phase and the planets trace their orbits with your own eyes. - EXPLORE FREELY Pinch and swipe from outside the solar system down to a planet's face. Tap any body for details. - DESIGNED WITH RESPECT - No ads, ever - No in-app purchases — one simple price - Works fully offline, on a plane or on a mountain - Collects zero personal data For curious kids asking "why?" For stargazers who want a quiet moment of awe. The real universe, in your pocket. LANGUAGES English, Japanese, Simplified Chinese, Korean, Spanish, French, German
Screenshots
Verdict
The clearest difference is rating: COSMOS at 5.0 against HandyPlanet's 1.0. COSMOS also leads on ads (none vs shown) and update cadence (every 2 weeks vs every 6 weeks). HandyPlanet's advantage is monetization model (ad-supported vs paid). On price, 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
COSMOS holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 1 and 3 respectively.
HandyPlanet ships an update every 6 weeks, COSMOS every 2 weeks. The most recent releases landed on October 28, 2026 and October 31, 2026 respectively.
| Parameter | HandyPlanet | COSMOS |
|---|---|---|
| Price | Free | Free |
| Rating | 1.0 (1 ratings) | 5.0 (3 ratings) — better |
| Number of ratings | 1 | 3 — better |
| Update frequency | Every 6 weeks | Every 2 weeks — better |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Ad-supported — better | Paid |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 18.6 | 15.0 — better |
| Further details — not scored | ||
| Size | 58 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | ARAKAKI CAIO DAISUKE | yuudai tasaki |
In-app purchases
HandyPlanet
No in-app purchases
COSMOS
No in-app purchases
