# Polygraf vs SpaceOver

The clearest difference is iOS requirement: Polygraf at 9.0 against SpaceOver's 15.0. On price, update cadence, 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.

Polygraf ships an update every 6 months, SpaceOver every 5 months. The most recent releases landed on October 2, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | Polygraf | SpaceOver |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/spaceover/id6444027977/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 5 months** |
| Monetization | — | Free |
| Size | 40 MB | 95 MB |
| Requires iOS | **9.0** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Masaryk University](https://appshunter.io/developer/443178424) | [Hyemin Seok](https://appshunter.io/developer/1643402480) |

## What reviewers say

### Polygraf

[App page](https://appshunter.io/ios/app/polygraf/id443178421)

**Features:** macOS Compatibility

**In-app purchases:** none


### SpaceOver

[App page](https://appshunter.io/ios/app/spaceover/id6444027977)

Experience a guided space journey using advanced accessibility features like VoiceOver and spatial sound. Explore celestial bodies with interactive 3D models and unique soundscapes, making space travel accessible to everyone.

**Highlights:** AR-guided celestial object location, Unique music for each astronomical object, 3D models of celestial bodies, VoiceOver support for all features, Spatial sound for location guidance, Interactive space travel

**In-app purchases:** none


## Frequently asked questions

### Is Polygraf free?

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

### Is SpaceOver free?

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

### Do Polygraf or SpaceOver have ads?

Neither Polygraf nor SpaceOver shows ads.

### Which is updated more often, Polygraf or SpaceOver?

Polygraf ships an update every 6 months, and SpaceOver every 5 months. Most recently, Polygraf was updated on October 2, 2026 and SpaceOver on September 29, 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.*