# Flexspeak AAC vs LispApp

The clearest difference is rating: LispApp at 5.0 against Flexspeak AAC's 4.2. LispApp also leads on iOS requirement (13.0 vs 15.1). Flexspeak AAC's advantage is ratings volume (5 vs 1). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Flexspeak AAC sells 3 in-app purchases, starting at $9.99 per month and LispApp sells 1 in-app purchase, starting at $34.99 per month. Whichever you choose, the download price is not the number that matters.

LispApp holds the better App Store score, 5.0 against 4.2. That said, the two scores are not equally well evidenced: Flexspeak AAC has 5 ratings behind it against 1, so its average is the more settled of the two.

Flexspeak AAC ships an update weekly, LispApp every 11 days. Both last shipped on November 4, 2026.

## The numbers

| Metric | Flexspeak AAC | LispApp |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.2 (5 ratings)](https://appshunter.io/ios/app/flexspeak-aac/id6642667205/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/lispapp-language-therapy/id6743806577/reviews)** |
| Number of ratings | **5** | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Every 11 days |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 254 MB | 145 MB |
| Requires iOS | 15.1 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Flexspeak](https://appshunter.io/developer/1722787361) | [ArraTreeni Oy](https://appshunter.io/developer/1345435068) |

## What reviewers say

### Flexspeak AAC

[App page](https://appshunter.io/ios/app/flexspeak-aac/id6642667205)

This app provides augmentative and alternative communication (AAC) for individuals who have difficulty speaking. It offers multilingual support, AI-powered prediction, and extensive customization options to facilitate clear and efficient communication.

**Highlights:** Multilingual support (Spanish, Vietnamese, Nepali, Mandarin), AI prediction for sentence completion, Easy vocabulary customization, Remote editing and group sharing, Extensive image library, Seamless auto-sync across devices

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly subscription | $9.99 | per month |
| Yearly subscription | $99.99 | per year |
| Lifetime | $299.99 | one-time |


### LispApp

[App page](https://appshunter.io/ios/app/lispapp-language-therapy/id6743806577)

This app offers interactive exercises and games to help children and teenagers practice and improve the pronunciation of the /s/ sound. Developed with speech-language pathologists, it follows proven therapeutic methods for effective home practice.

**Highlights:** Interactive /s/ sound exercises, Auditory bombardment, Listening for /s/ discrimination, Oral motor skill practice, Shaping /s/ sound production, Syllable and word practice

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| LispApp monthly subscription. | $34.99 | per month |


## Frequently asked questions

### Is Flexspeak AAC free?

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

### Is LispApp free?

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

### Which has better reviews, Flexspeak AAC or LispApp?

LispApp is rated higher. Flexspeak AAC averages 4.2 out of 5 from 5 ratings, while LispApp averages 5.0 from 1 ratings.

### Do Flexspeak AAC or LispApp have ads?

Neither Flexspeak AAC nor LispApp shows ads.

### Which is updated more often, Flexspeak AAC or LispApp?

Flexspeak AAC ships an update weekly, and LispApp every 11 days. Most recently, Flexspeak AAC was updated on November 4, 2026 and LispApp on November 4, 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.*