# Science vs iTaunz

The clearest difference is price: iTaunz at Free against Science's $0.99. iTaunz also leads on update cadence (every 4 months vs every 27 months) and device support (3 vs 1). Science's advantage is iOS requirement (13.0 vs 15.0). On ads and in-app purchases there is nothing between them.

iTaunz 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, iTaunz every 4 months. The most recent releases landed on September 15, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Science | iTaunz |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 27 months | **Every 4 months** |
| Size | 23 MB | 54 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | Apple TV | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Illés László](https://appshunter.io/developer/316890672) | [Tachtenverein Rossecker](https://appshunter.io/developer/1593652800) |

## What reviewers say

### Science

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

**In-app purchases:** none


### iTaunz

[App page](https://appshunter.io/ios/app/itaunz/id1593652798)

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

**In-app purchases:** none


## Frequently asked questions

### Is Science free?

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

### Is iTaunz free?

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

### Do Science or iTaunz have ads?

Neither Science nor iTaunz shows ads.

### Which is updated more often, Science or iTaunz?

Science ships an update every 27 months, and iTaunz every 4 months. Most recently, Science was updated on September 15, 2026 and iTaunz on October 27, 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.*