# EarthPi vs Solar System Clock

The clearest difference is in-app purchases: Solar System Clock at none against EarthPi's 1. Solar System Clock also leads on update cadence (every 2 days vs every 3 months). EarthPi's advantage is iOS requirement (12.0 vs 16.6). On price, ads and device support there is nothing between them.

Both are free to download. EarthPi sells 1 one-off in-app purchase. Solar System Clock asks for nothing beyond the download.

EarthPi ships an update every 3 months, Solar System Clock every 2 days. The most recent releases landed on October 15, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | EarthPi | Solar System Clock |
| --- | --- | --- |
| Price | Free | 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 | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 days** |
| Monetization | Free with in-app purchases | — |
| Size | 116 MB | 5 MB |
| Requires iOS | **12.0** | 16.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Othman Alzahrani](https://appshunter.io/developer/1664580679) | [Mateusz Andrzejczuk](https://appshunter.io/developer/1158375886) |

## What reviewers say

### 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 |


### Solar System Clock

[App page](https://appshunter.io/ios/app/solar-system-clock/id6746730661)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is EarthPi free?

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

### Is Solar System Clock free?

Solar System Clock is free to download, with no in-app purchases.

### Do EarthPi or Solar System Clock have ads?

Neither EarthPi nor Solar System Clock shows ads.

### Which is updated more often, EarthPi or Solar System Clock?

EarthPi ships an update every 3 months, and Solar System Clock every 2 days. Most recently, EarthPi was updated on October 15, 2026 and Solar System Clock on October 9, 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.*