# Science vs Mistar Urdd

The clearest difference is price: Mistar Urdd at Free against Science's $0.99. Mistar Urdd also leads on device support (3 vs 1). On update cadence, ads, in-app purchases and iOS requirement there is nothing between them.

Mistar Urdd is free to download; Science costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Science ships an update every 27 months, Mistar Urdd every 35 months. The most recent releases landed on September 15, 2026 and August 16, 2026 respectively.

## The numbers

| Metric | Science | Mistar Urdd |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 27 months** | Every 35 months |
| Size | 23 MB | 122 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | Apple TV | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Illés László](https://appshunter.io/developer/316890672) | [Atebol Cyfyngedig](https://appshunter.io/developer/957818356) |

## What reviewers say

### Science

[App page](https://appshunter.io/ios/app/science-solarsystem/id1054480020)

**In-app purchases:** none


### Mistar Urdd

[App page](https://appshunter.io/ios/app/mistar-urdd/id1378580101)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Science free?

Science costs $0.99, with no in-app purchases.

### Is Mistar Urdd free?

Mistar Urdd is free to download, with no in-app purchases.

### Do Science or Mistar Urdd have ads?

Neither Science nor Mistar Urdd shows ads.

### Which is updated more often, Science or Mistar Urdd?

Science ships an update every 27 months, and Mistar Urdd every 35 months. Most recently, Science was updated on September 15, 2026 and Mistar Urdd on August 16, 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.*