# Eye Type AAC vs Prism

The clearest difference is in-app purchases: Prism at none against Eye Type AAC's 2. Prism also leads on update cadence (every 3 days vs every 11 months). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. Eye Type AAC sells 2 one-off in-app purchases. Prism asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Eye Type AAC against 5.0 for Prism. Both are backed by a comparable volume of ratings — 1 and 2 respectively.

Eye Type AAC ships an update every 11 months, Prism every 3 days. The most recent releases landed on October 15, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | Eye Type AAC | Prism |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/eye-type-aac/id6501984152/reviews) | [5.0 (2 ratings)](https://appshunter.io/ios/app/prism-aac/id6764692277/reviews) |
| Number of ratings | 1 | **2** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 11 months | **Every 3 days** |
| Monetization | Free | Free |
| Size | 14 MB | 13 MB |
| Requires iOS | **15.0** | 16.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Su-Kam Intelligent Education Systems Inc](https://appshunter.io/developer/919049297) | [Synalux LLC](https://appshunter.io/developer/1895881089) |

## What reviewers say

### Eye Type AAC

[App page](https://appshunter.io/ios/app/eye-type-aac/id6501984152)

This app enables communication through eye or head tracking on iOS devices. It offers a simple, free interface for text-to-speech output, designed for individuals with motor impairments.

**Highlights:** Eye tracking and head tracking, Text-to-speech output, Large, high-contrast buttons, Word prediction, Simple interface, Works on iPhone and iPad

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 7-day free trial | Free | one-time |
| Activate forever | $19.99 | one-time |


### Prism

[App page](https://appshunter.io/ios/app/prism-aac/id6764692277)

This communication app provides on-device AI and supports 12 languages, offering a private and accessible way for nonverbal users to express themselves. It functions fully offline and can be controlled from an Apple Watch, making communication possible anywhere, anytime.

**Highlights:** On-device AI, Apple Watch support, 12 languages, Offline functionality, Customizable vocabulary, No subscriptions or ads

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Eye Type AAC free?

Eye Type AAC is free to download, with in-app purchases available.

### Is Prism free?

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

### Which has better reviews, Eye Type AAC or Prism?

Eye Type AAC and Prism are both rated 5.0 out of 5 on the App Store, from 1 and 2 ratings respectively.

### Do Eye Type AAC or Prism have ads?

Neither Eye Type AAC nor Prism shows ads.

### Which is updated more often, Eye Type AAC or Prism?

Eye Type AAC ships an update every 11 months, and Prism every 3 days. Most recently, Eye Type AAC was updated on October 15, 2026 and Prism on October 2, 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.*