# Alien Planets vs EarthPi

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.

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.

## The numbers

| Metric | Alien Planets | EarthPi |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | — | **[4.4 (14 ratings)](https://appshunter.io/ios/app/earthpi/id6741358020/reviews)** |
| Number of ratings | — | **14** |
| Positive reviews | — | 66.7% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 27 months | **Every 3 months** |
| Monetization | — | Free with in-app purchases |
| Size | 34 MB | 116 MB |
| Requires iOS | 18.2 | **12.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Jose Leal](https://appshunter.io/developer/1441468562) | [Othman Alzahrani](https://appshunter.io/developer/1664580679) |

## What reviewers say

### Alien Planets

[App page](https://appshunter.io/ios/app/alien-planets/id1478121868)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### EarthPi

[App page](https://appshunter.io/ios/app/earthpi/id6741358020)

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.

**Highlights:** 27 Earth projections, Smooth projection transitions, Time control for sunlight simulation, Celestial tracking (sun and moon), Screenshot functionality

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| EarthPi Premium | $3.99 | one-time |


## Frequently asked questions

### Is Alien Planets free?

Alien Planets costs $9.99, with no in-app purchases.

### Is EarthPi free?

EarthPi is free to download, with in-app purchases available.

### Do Alien Planets or EarthPi have ads?

Neither Alien Planets nor EarthPi shows ads.

### Which is updated more often, Alien Planets or EarthPi?

Alien Planets ships an update every 27 months, and EarthPi every 3 months. Most recently, Alien Planets was updated on October 3, 2026 and EarthPi on October 15, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*