# iRis vs Sound Amplifier | Volume Boost

The clearest difference is in-app purchases: iRis at none against Sound Amplifier | Volume Boost's 5. iRis also leads on iOS requirement (8.0 vs 14.0). Sound Amplifier | Volume Boost's advantage is ratings volume (2.3K vs 10) and review sentiment (84% vs 75%). On price, rating, ads and device support there is nothing between them.

Both are free to download. Sound Amplifier | Volume Boost sells 5 in-app purchases, starting at $5.99 per 7 days. iRis asks for nothing beyond the download.

Sound Amplifier | Volume Boost holds the better App Store score, 4.5 against 4.3. That said, the two scores are not equally well evidenced: Sound Amplifier | Volume Boost has 2.3K ratings behind it against 10, so its average is the more settled of the two. Written reviews point the same way: 75% of iRis's written reviews are positive against 84% of Sound Amplifier | Volume Boost's.

## The numbers

| Metric | iRis | Sound Amplifier | Volume Boost |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.3 (10 ratings)](https://appshunter.io/ios/app/iris-vision-through-vr/id1446528453/reviews) | **[4.5 (2.3K ratings)](https://appshunter.io/ios/app/sound-amplifier-volume-boost/id1470850192/reviews)** |
| Number of ratings | 10 | **2.3K** |
| Positive reviews | 75.0% of reviews | **84.3% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 4 months |
| Monetization | **Free** | Freemium |
| Size | 43 MB | 34 MB |
| Requires iOS | **8.0** | 14.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Thomas Warren](https://appshunter.io/developer/987169219) | [Irakli Tsuladze](https://appshunter.io/developer/1731800085) |

## 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


### Sound Amplifier | Volume Boost

[App page](https://appshunter.io/ios/app/sound-amplifier-volume-boost/id1470850192)

Amplify live headphone audio and enhance your listening experience. This app offers volume boosts, music enhancement, and even a hearing assessment. Record audio and review transcriptions to never miss a word.

**Highlights:** Volume boost presets, Music enhancement, Hearing assessment, Live audio recording, Real-time transcriptions, Personalized hearing profiles, Noise reduction

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Access | $5.99 | per 7 days |
| Hearing Amplifier, Ear Spy | $11.99 | per month |
| 3-Month Sound Boost Access | $12.99 | per 3 months |
| Listening Device, Amp Me | $39.99 | per year |
| lifetime | $44.99 | one-time |

**What reviewers like**

- 👍 Clear audio quality
- 🚀 Effective sound amplification
- 💡 Useful hearing profile test
- 🔒 Secure and private
- 👍 Easy to use interface

**What reviewers complain about**

- 🔒 Requires subscription for full access
- 🐛 Occasional bugs and glitches
- 🔋 High battery consumption
- 🔒 Forced to leave review for access

**Reported bugs**

- Recording feature not working
- Delayed sound output
- Compatibility issues with older devices

**Requested features**

- Compatibility with more audio sources
- Background playback support
- Customizable sound profiles
- Volume boost for specific apps


## Frequently asked questions

### Is iRis free?

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

### Is Sound Amplifier | Volume Boost free?

Sound Amplifier | Volume Boost is free to download, with in-app purchases available.

### Which has better reviews, iRis or Sound Amplifier | Volume Boost?

Sound Amplifier | Volume Boost is rated higher. iRis averages 4.3 out of 5 from 10 ratings, while Sound Amplifier | Volume Boost averages 4.5 from 2.3K ratings.

### Do iRis or Sound Amplifier | Volume Boost have ads?

Neither iRis nor Sound Amplifier | Volume Boost 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.*