Cosmic vs EarthPi
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Cosmic
Explore the cosmos with this app that offers interactive tools for celestial navigation and astronomical observation. Visualize the sky, Earth, and solar system from multiple perspectives, and discover constellations, planets, and events in augmented reality. It's a blend of ancient wisdom and modern technology for a deeper connection to the universe.
- Multiple celestial perspectives (sky, Earth, solar system)
- Augmented reality sky exploration
- Interactive astronomical and world clocks
- Visualized natal charts (Western, Vedic, Sidereal)
- Day/night cycles on Earth globe
- Celestial navigation guides
- Notifications for astronomical events
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The sky above you, the Earth beneath you, the solar system you move through space. Three perspectives no other app combines this way. For thousands of years humans read the sky to measure time, navigate the Earth, and find meaning in their existence. Astronomy, astrology, and timekeeping were one science. Cosmic Watch reunites them. Free for the first time in ten years. FEATURES (core) • Sky View — stars, planets, and constellations • Earth View — day and night cycle, the cosmos around it • Solar System — geocentric and heliocentric • Celestial sphere — full 360° sky overview, unique to this app • Astrology Mode — Western, Vedic and 3D • Retrograde motion across all planets • World clock and astronomical events • Notifications for eclipses, solstices, and moon cycles • Celestial navigation — orient yourself by the sky Or just watch the Earth float in space and remember where you are. Free to explore. The three views, sky guide, every layer, star names, world clock, and notifications are yours from the first open. Tools and Time Control unlock with a subscription — or forever with Cosmic Pro. Keep the project alive and growing. We read every message you send us. TOOLS (in-app purchase) • Moon Calendar • Real-Time Clouds • Meteor Showers • Comets • Planetary Aspects • Retrograde Year • Dreamspell Calendar • Atmosphere Clockface • Save Date / Time / Location • Time Control — move forward and back, any moment A full app. Not a widget or watch face, yet. Runs on iPhone, iPad, and Apple Silicon Mac Privacy committed: No account required. Analytics never shared. Webby Award for Best Educational App 2018. New York Times. Wired. Space.com. By a Chi Gong master and an animation artist. Still looking up. Time is the Cosmic Rhythm. Terms of Use: https://cosmic-watch.com/termsOfService/ Privacy Policy: https://cosmic-watch.com/privacyPolicy/
EarthPi
Explore Earth with 27 interactive map projections. Visualize the planet from different angles, adjust time to see sunlight, and track celestial bodies. Save your discoveries with screenshot functionality.
- 27 Earth projections
- Smooth projection transitions
- Time control for sunlight simulation
- Celestial tracking (sun and moon)
- Screenshot functionality
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EarthPi is a unique app designed to provide users with a detailed and interactive way to explore Earth through various map projections. With 27 distinct Earth projections, the app allows users to study and visualize the planet from multiple perspectives. Key Features: - 27 Earth Projections: Choose from a variety of Earth's map projections. - Smooth Projection Transitions: Switch between projections seamlessly with fluid animations and learn how each map projection works. - Time Control: Adjust the time to observe the dynamic interaction of sunlight with Earth’s surface across all projections. - Celestial Tracking: View the real-time positions of the sun and moon based on the selected time. - Screenshot Functionality: Capture and save images of any map projection. Future Development: The developer is dedicated to expanding EarthPi’s capabilities, with plans to introduce additional projections, features, and improvements.
Screenshots
Verdict
The clearest difference is rating: Cosmic at 4.8 against EarthPi's 4.5. Cosmic also leads on review sentiment (87% vs 67%) and ratings volume (636 vs 16). EarthPi's advantage is update cadence (every 3 months vs every 6 months) and iOS requirement (12.0 vs 15.0). On price, ads, in-app purchases 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
Both are free to download. Cosmic sells 6 in-app purchases, starting at $0.99 per month and EarthPi sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
Cosmic holds the better App Store score, 4.8 against 4.5. That said, the two scores are not equally well evidenced: Cosmic has 636 ratings behind it against 16, so its average is the more settled of the two. Written reviews point the same way: 87% of Cosmic's written reviews are positive against 67% of EarthPi's.
Cosmic ships an update every 6 months, EarthPi every 3 months. The most recent releases landed on November 1, 2026 and October 30, 2026 respectively.
| Parameter | Cosmic | EarthPi |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (636 ratings) — better | 4.5 (16 ratings) |
| Positive reviews | 86.8% of reviews — better | 66.7% of reviews |
| Number of ratings | 636 — better | 16 |
| Update frequency | Every 6 months | Every 3 months — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 12.0 — better |
| Further details — not scored | ||
| Size | 194 MB | 116 MB |
| Age rating | 4+ | 4+ |
| Developer | Celestial Dynamics AG | Othman Alzahrani |
Customer experience
Cosmic
EarthPi
Bugs and requests
Cosmic
Reported bugs
3 issues- Date and time not accurately reflected in the solar system view
- Inconsistent behavior when switching between different modes and settings
- Difficulty in maintaining user preferences across sessions
Requested features
5 requests- Add an alarm feature to wake up to different celestial views
- Implement support for Apple Watch and other wearables
- Provide more options to customize the display and information layers
- Include a night mode or dimmer setting for better visibility in low light
- Integrate with other astronomy apps and tools for a more comprehensive experience
EarthPi
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Cosmic
- Monthly Plan$0.991 Month
- Monthly$2.991 Month
- Yearly Plan$4.991 Year
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- Yearly$24.991 Year
- Tools Pack$2.99
- Cosmic Pro$69.99
EarthPi
- EarthPi Premium$3.99









