# Fast AAC vs ExternUp

The clearest difference is in-app purchases: ExternUp at none against Fast AAC's 1. ExternUp also leads on iOS requirement (15.0 vs 17). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Fast AAC sells 1 one-off in-app purchase. ExternUp asks for nothing beyond the download.

Fast AAC ships an update every 3 days, ExternUp every 4 days. The most recent releases landed on November 8, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | Fast AAC | ExternUp |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (8 ratings)](https://appshunter.io/ios/app/fast-aac/id6751174676/reviews)** | — |
| Number of ratings | **8** | — |
| Positive reviews | 80.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 4 days |
| Monetization | Free | — |
| Size | 406 MB | 4 MB |
| Requires iOS | 17 | **15.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Martin Saetre](https://appshunter.io/developer/1833821205) | [Dixie Technical College](https://appshunter.io/developer/1466165248) |

## What reviewers say

### Fast AAC

[App page](https://appshunter.io/ios/app/fast-aac/id6751174676)

This app provides a voice for individuals with speech challenges, offering a customizable platform for communication. It features a large library of image tiles, flexible layouts, and predictive text to facilitate ease of expression. The app supports multiple languages and works offline, making communication accessible anywhere.

**Highlights:** 4000+ image tiles, Customizable grid layouts, Multilingual support, Time-saving predictions, Offline functionality, Light and dark modes

**Features:** Family Sharing, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Fast AAC Premium | $12.99 | one-time |


### ExternUp

[App page](https://appshunter.io/ios/app/externup/id6812879339)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Fast AAC free?

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

### Is ExternUp free?

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

### Do Fast AAC or ExternUp have ads?

Neither Fast AAC nor ExternUp shows ads.

### Which is updated more often, Fast AAC or ExternUp?

Fast AAC ships an update every 3 days, and ExternUp every 4 days. Most recently, Fast AAC was updated on November 8, 2026 and ExternUp on October 26, 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.*