# Speech Assistant vs Prism

The clearest difference is in-app purchases: Prism at none against Speech Assistant's 4. Prism also leads on update cadence (every 2 days vs every 3 weeks) and iOS requirement (16.0 vs 26.0). On price, ads and device support there is nothing between them.

Both are free to download. Speech Assistant sells 4 in-app purchases, starting at $4.99 per 7 days. Prism asks for nothing beyond the download.

Speech Assistant ships an update every 3 weeks, Prism every 2 days. The most recent releases landed on September 19, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | Speech Assistant | 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 3 weeks | **Every 2 days** |
| Monetization | — | Free |
| Size | 134 MB | 13 MB |
| Requires iOS | 26.0 | **16.0** |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, Apple Watch |
| Age rating | 17+ | 4+ |
| Developer | [Keerthi Reddy Bommareddy](https://appshunter.io/developer/1871703743) | [Synalux LLC](https://appshunter.io/developer/1895881089) |

## What reviewers say

### Speech Assistant

[App page](https://appshunter.io/ios/app/speech-assistant-aac-pad/id6764142827)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SAA Premium Access Weekly | $4.99 | per 7 days |
| Premium Access Monthly | $9.99 | per month |
| SAA Premium Access - Yearly | $29.99 | per year |
| SAA Premium Access Lifetime | $39.99 | 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 Assistant free?

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

### Is Prism free?

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

### Do Speech Assistant or Prism have ads?

Neither Speech Assistant nor Prism shows ads.

### Which is updated more often, Speech Assistant or Prism?

Speech Assistant ships an update every 3 weeks, and Prism every 2 days. Most recently, Speech Assistant was updated on September 19, 2026 and Prism on September 15, 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.*