# Earth Clock Calendar vs Sol Clock

The clearest difference is update cadence: Sol Clock at every 3 days against Earth Clock Calendar's weekly. Earth Clock Calendar's advantage is iOS requirement (15.0 vs 26.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Earth Clock Calendar sells 1 one-off in-app purchase and Sol Clock sells 2 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

Earth Clock Calendar ships an update weekly, Sol Clock every 3 days. The most recent releases landed on September 17, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | Earth Clock Calendar | Sol Clock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (7 ratings)](https://appshunter.io/ios/app/earth-clock-calendar/id1623275786/reviews)** | — |
| Number of ratings | **7** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Weekly | **Every 3 days** |
| Monetization | Free with in-app purchases | — |
| Size | 18 MB | 8 MB |
| Requires iOS | **15.0** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Earth at the Center LLC](https://appshunter.io/developer/1437026436) | [Mark Zigadlo](https://appshunter.io/developer/1879779038) |

## What reviewers say

### Earth Clock Calendar

[App page](https://appshunter.io/ios/app/earth-clock-calendar/id1623275786)

This app visualizes time and date based on celestial movements. It displays the Earth, Moon, and Sun's positions, offering a unique perspective on timekeeping and natural rhythms. Users can explore various cultural calendars and understand their relationship to natural cycles.

**Highlights:** Earth, Moon, and Sun visualization, Planetary time and date display, Automatic time zone and location adjustment, Moon phase tracking, Zodiac sign integration for months, Sunrise and sunset times, Multiple cultural calendar options

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Chinese Calendar | $0.99 | one-time |


### Sol Clock

[App page](https://appshunter.io/ios/app/sol-clock/id6770347619)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $0.99 | per month |
| Pro Annual | $7.99 | per year |


## Frequently asked questions

### Is Earth Clock Calendar free?

Earth Clock Calendar is free to download, with in-app purchases available.

### Is Sol Clock free?

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

### Do Earth Clock Calendar or Sol Clock have ads?

Neither Earth Clock Calendar nor Sol Clock shows ads.

### Which is updated more often, Earth Clock Calendar or Sol Clock?

Earth Clock Calendar ships an update weekly, and Sol Clock every 3 days. Most recently, Earth Clock Calendar was updated on September 17, 2026 and Sol Clock on September 11, 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.*