Alien Planets vs EarthPi
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Alien Planets
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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
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 price: EarthPi at Free against Alien Planets's $9.99. EarthPi also leads on update cadence (every 3 months vs every 27 months) and iOS requirement (12.0 vs 18.2). Alien Planets's advantage is in-app purchases (none vs 1). On ads 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
EarthPi is free to download; Alien Planets costs $9.99 up front. EarthPi sells 1 one-off in-app purchase. Alien Planets asks for nothing beyond the download.
Alien Planets ships an update every 27 months, EarthPi every 3 months. The most recent releases landed on October 3, 2026 and October 15, 2026 respectively.
| Parameter | Alien Planets | EarthPi |
|---|---|---|
| Price | $9.99 | Free — better |
| Rating | — | 4.4 (14 ratings) — better |
| Positive reviews | — | 66.7% of reviews |
| Number of ratings | — | 14 — better |
| Update frequency | Every 27 months | Every 3 months — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 18.2 | 12.0 — better |
| Further details — not scored | ||
| Size | 34 MB | 116 MB |
| Age rating | 4+ | 4+ |
| Developer | Jose Leal | Othman Alzahrani |
In-app purchases
Alien Planets
No in-app purchases
EarthPi
- EarthPi Premium$3.99
Questions
Is Alien Planets free?
Is EarthPi free?
Do Alien Planets or EarthPi have ads?
Which is updated more often, Alien Planets or EarthPi?
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