# OLogy vs Read Ninja

The clearest difference is device support: Read Ninja at 3 against OLogy's 1. OLogy's advantage is iOS requirement (12.0 vs 15.1). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | OLogy | Read Ninja |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (25 ratings)](https://appshunter.io/ios/app/ology-science-for-kids/id1512196504/reviews)** | — |
| Number of ratings | **25** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 14 months | — |
| Monetization | Free | — |
| Size | 320 MB | 52 MB |
| Requires iOS | **12.0** | 15.1 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [American Museum of Natural History](https://appshunter.io/developer/351849240) | [Sergei Terekhov](https://appshunter.io/developer/1821556806) |

## What reviewers say

### OLogy

[App page](https://appshunter.io/ios/app/ology-science-for-kids/id1512196504)

Explore science through engaging games, videos, and articles developed by museum educators and scientists. Discover topics from paleontology to astronomy with interactive activities.

**Highlights:** Interactive science games, Educational videos, Informative articles, Topics from Archaeology to Zoology, Developed by museum educators, Trusted by teachers

**In-app purchases:** none


### Read Ninja

[App page](https://appshunter.io/ios/app/read-ninja/id6755857607)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is OLogy free?

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

### Is Read Ninja free?

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

### Do OLogy or Read Ninja have ads?

Neither OLogy nor Read Ninja shows ads.

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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.*