# Space Station Research Xplorer vs Read Ninja

Space Station Research Xplorer and Read Ninja are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

## The numbers

| Metric | Space Station Research Xplorer | Read Ninja |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (10 ratings)](https://appshunter.io/ios/app/space-station-research-xplorer/id934070569/reviews)** | — |
| Number of ratings | **10** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 weeks | — |
| Monetization | Free | — |
| Size | 151 MB | 52 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [NASA](https://appshunter.io/developer/355542146) | [Sergei Terekhov](https://appshunter.io/developer/1821556806) |

## What reviewers say

### Space Station Research Xplorer

[App page](https://appshunter.io/ios/app/space-station-research-xplorer/id934070569)

Explore a vast collection of experiments conducted on the International Space Station, both past and present. Discover the results and benefits of microgravity research through interactive media, detailed descriptions, and visual tours of the station's modules and external facilities.

**Highlights:** Browse ISS experiments by category, View experiment results and benefits, Interactive lab and facility tours, Search for specific experiments, Add experiments to favorites, Access science-related videos

**Features:** Vision Pro support

**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 Space Station Research Xplorer free?

Space Station Research Xplorer 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 Space Station Research Xplorer or Read Ninja have ads?

Neither Space Station Research Xplorer 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.*