# Picture Grid Speech vs Isaac AAC

The clearest difference is in-app purchases: Picture Grid Speech at none against Isaac AAC's 2. Isaac AAC's advantage is update cadence (weekly vs every 26 months) and iOS requirement (14.0 vs 17.4). On price, ads and device support there is nothing between them.

Both are free to download. Isaac AAC sells 2 in-app purchases, starting at $7.99 per month. Picture Grid Speech asks for nothing beyond the download.

Picture Grid Speech ships an update every 26 months, Isaac AAC weekly. Both last shipped on October 24, 2026.

## The numbers

| Metric | Picture Grid Speech | Isaac AAC |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/isaac-aac/id6746368688/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 26 months | **Weekly** |
| Monetization | — | Subscription |
| Size | 9 MB | 148 MB |
| Requires iOS | 17.4 | **14.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Nathan Fennel](https://appshunter.io/developer/968469779) | [Adrian Golian](https://appshunter.io/developer/1816458968) |

## What reviewers say

### Picture Grid Speech

[App page](https://appshunter.io/ios/app/picture-grid-speech/id6639588366)

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

**In-app purchases:** none


### Isaac AAC

[App page](https://appshunter.io/ios/app/isaac-aac/id6746368688)

This communication app uses voice synthesis, visual symbols, and AI-powered predictive text to help individuals with communication challenges express themselves. It aims to enhance independence and quality of life for users of all ages.

**Highlights:** Advanced voice synthesis, Intuitive visual symbols, AI-powered predictive text, Customizable communication platform, Supports independence and quality of life

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription ISAAC | $7.99 | per month |
| Isaac | $4.99 | one-time |


## Frequently asked questions

### Is Picture Grid Speech free?

Picture Grid Speech is free to download, with no in-app purchases.

### Is Isaac AAC free?

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

### Do Picture Grid Speech or Isaac AAC have ads?

Neither Picture Grid Speech nor Isaac AAC shows ads.

### Which is updated more often, Picture Grid Speech or Isaac AAC?

Picture Grid Speech ships an update every 26 months, and Isaac AAC weekly. Most recently, Picture Grid Speech was updated on October 24, 2026 and Isaac AAC on October 24, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*