# iRis vs Volt

The clearest difference is in-app purchases: iRis at none against Volt's 1. iRis also leads on iOS requirement (8.0 vs 18.0). On price, ads and device support there is nothing between them.

Both are free to download. Volt sells 1 in-app purchase, starting at $6.99 per year. iRis asks for nothing beyond the download.

## The numbers

| Metric | iRis | Volt |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (10 ratings)](https://appshunter.io/ios/app/iris-vision-through-vr/id1446528453/reviews)** | — |
| Number of ratings | **10** | — |
| Positive reviews | 75.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 10 days |
| Monetization | Free | — |
| Size | 43 MB | 9 MB |
| Requires iOS | **8.0** | 18.0 |
| Devices | iPhone, iPod | iPhone, Apple Watch |
| Age rating | 4+ | 12+ |
| Developer | [Thomas Warren](https://appshunter.io/developer/987169219) | [Daniel Kiss](https://appshunter.io/developer/1285845623) |

## What reviewers say

### iRis

[App page](https://appshunter.io/ios/app/iris-vision-through-vr/id1446528453)

This app enhances vision by adding contrast to images, making text easier to read. It works with any VR headset that supports camera input and is compatible with iOS devices.

**Highlights:** VR headset compatibility, Image contrast enhancement, Grayscale vision mode, Improved text readability, iOS 8 and up support

**In-app purchases:** none


### Volt

[App page](https://appshunter.io/ios/app/volt-your-treadmill-runmate/id6798171032)

**Features:** Family Sharing, Apple Watch app

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Volt Premium | $6.99 | per year |


## Frequently asked questions

### Is iRis free?

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

### Is Volt free?

Volt is free to download, with in-app purchases available.

### Do iRis or Volt have ads?

Neither iRis nor Volt 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.*