# Sun Light Hours vs Solar System Clock

The clearest difference is in-app purchases: Solar System Clock at none against Sun Light Hours's 7. Solar System Clock also leads on ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. Sun Light Hours sells 7 one-off in-app purchases. Solar System Clock asks for nothing beyond the download.

Sun Light Hours ships an update every 3 days, Solar System Clock every 2 days. The most recent releases landed on September 14, 2026 and August 15, 2026 respectively.

## The numbers

| Metric | Sun Light Hours | Solar System Clock |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 3 days | **Every 2 days** |
| Size | 43 MB | 5 MB |
| Requires iOS | 16.6 | 16.6 |
| Devices | iPhone, iPad | **iPhone, iPad, Apple Watch** |
| Age rating | 17+ | 4+ |
| Developer | [NovaNext](https://appshunter.io/developer/1285557502) | [Mateusz Andrzejczuk](https://appshunter.io/developer/1158375886) |

## What reviewers say

### Sun Light Hours

[App page](https://appshunter.io/ios/app/sun-light-hours/id6499107039)

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Coffee | $0.99 | one-time |
| Remove Ads | $0.99 | one-time |
| Donate $3 | $2.99 | one-time |
| Donate $5 | $4.99 | one-time |
| Donate $10 | $9.99 | one-time |
| Donate $15 | $14.99 | one-time |
| Donate $20 | $19.99 | 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 Sun Light Hours free?

Sun Light Hours 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 Sun Light Hours or Solar System Clock have ads?

Sun Light Hours shows ads; Solar System Clock does not.

### Which is updated more often, Sun Light Hours or Solar System Clock?

Sun Light Hours ships an update every 3 days, and Solar System Clock every 2 days. Most recently, Sun Light Hours was updated on September 14, 2026 and Solar System Clock on August 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.*