# Real Solar System vs Sun Light Hours

The clearest difference is in-app purchases: Real Solar System at none against Sun Light Hours's 7. Real Solar System also leads on ads (none vs shown). Sun Light Hours's advantage is update cadence (every 3 days vs monthly). On price, 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. Real Solar System asks for nothing beyond the download.

Real Solar System ships an update monthly, Sun Light Hours every 3 days. The most recent releases landed on September 20, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | Real Solar System | Sun Light Hours |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Monthly | **Every 3 days** |
| Size | 302 MB | 43 MB |
| Requires iOS | 17.6 | **16.6** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Masaya Nagaoka](https://appshunter.io/developer/1698240335) | [NovaNext](https://appshunter.io/developer/1285557502) |

## What reviewers say

### Real Solar System

[App page](https://appshunter.io/ios/app/real-solar-system/id6475644962)

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is Real Solar System free?

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

### Is Sun Light Hours free?

Sun Light Hours is free to download, with in-app purchases available.

### Do Real Solar System or Sun Light Hours have ads?

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

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

Real Solar System ships an update monthly, and Sun Light Hours every 3 days. Most recently, Real Solar System was updated on September 20, 2026 and Sun Light Hours on September 14, 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.*