# Earth Clock Calendar vs Solarark Projects

The clearest difference is in-app purchases: Solarark Projects at none against Earth Clock Calendar's 8. Solarark Projects also leads on iOS requirement (13.4 vs 16.6). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Earth Clock Calendar sells 8 one-off in-app purchases. Solarark Projects asks for nothing beyond the download.

Earth Clock Calendar ships an update every 3 weeks, Solarark Projects fortnightly. The most recent releases landed on November 7, 2026 and November 8, 2026 respectively.

## The numbers

| Metric | Earth Clock Calendar | Solarark Projects |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (11 ratings)](https://appshunter.io/ios/app/earth-clock-calendar/id1623275786/reviews)** | — |
| Number of ratings | **11** | — |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Fortnightly** |
| Monetization | Free with in-app purchases | — |
| Size | 30 MB | 57 MB |
| Requires iOS | 16.6 | **13.4** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Earth at the Center LLC](https://appshunter.io/developer/1437026436) | [AHASOLAR TECHNOLOGIES LIMITED](https://appshunter.io/developer/1632224285) |

## 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:** macOS Compatibility, Vision Pro support

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| All Calendars | Free | one-time |
| Chinese Calendar | $0.99 | one-time |
| English | $0.99 | one-time |
| Indian Calendars | $0.99 | one-time |
| Hebrew Calendar | $0.99 | one-time |
| Alexandrian Calendars | $0.99 | one-time |
| Iranian Calendars | $0.99 | one-time |
| US English | $1.99 | one-time |


### Solarark Projects

[App page](https://appshunter.io/ios/app/solarark-projects/id6471408812)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Earth Clock Calendar free?

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

### Is Solarark Projects free?

Solarark Projects is free to download, with no in-app purchases.

### Do Earth Clock Calendar or Solarark Projects have ads?

Neither Earth Clock Calendar nor Solarark Projects shows ads.

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

Earth Clock Calendar ships an update every 3 weeks, and Solarark Projects fortnightly. Most recently, Earth Clock Calendar was updated on November 7, 2026 and Solarark Projects on November 8, 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.*