# Speech AAC vs Prism

The clearest difference is in-app purchases: Prism at none against Speech AAC's 6. On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Speech AAC sells 6 one-off in-app purchases. Prism asks for nothing beyond the download.

## The numbers

| Metric | Speech AAC | Prism |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/prism-aac/id6764692277/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | — | Every 2 days |
| Monetization | — | Free |
| Size | 129 MB | 13 MB |
| Requires iOS | 17.6 | **16.0** |
| Devices | iPhone, iPad | **iPhone, iPad, Apple Watch** |
| Age rating | 12+ | 4+ |
| Developer | [Carlton Payne III](https://appshunter.io/developer/923853665) | [Synalux LLC](https://appshunter.io/developer/1895881089) |

## What reviewers say

### Speech AAC

[App page](https://appshunter.io/ios/app/speech-aac/id6759862129)

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Small Tip | $0.99 | one-time |
| Medium Tiip | $4.99 | one-time |
| Large Tip | $9.99 | one-time |
| Huge Thank You! | $19.99 | one-time |
| Champion! | $49.99 | one-time |
| Legend! | $99.99 | 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 Speech AAC free?

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

### Is Prism free?

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

### Do Speech AAC or Prism have ads?

Neither Speech AAC nor Prism 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.*