# Speech Assistant AAC vs Ratio S/Z

The clearest difference is price: Ratio S/Z at $2.99 against Speech Assistant AAC's $24.99. Ratio S/Z also leads on iOS requirement (11.0 vs 15.5). Speech Assistant AAC's advantage is update cadence (every 3 weeks vs every 3 months) and chart position (#20 vs #131). On ads, in-app purchases and device support there is nothing between them.

Speech Assistant AAC costs $24.99 and Ratio S/Z $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Speech Assistant AAC ships an update every 3 weeks, Ratio S/Z every 3 months. Both last shipped on November 6, 2026.

## The numbers

| Metric | Speech Assistant AAC | Ratio S/Z |
| --- | --- | --- |
| Price | $24.99 | **$2.99** |
| Rating | **[4.5 (105 ratings)](https://appshunter.io/ios/app/speech-assistant-aac/id1139762358/reviews)** | — |
| Number of ratings | **105** | — |
| Positive reviews | 81.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 3 months |
| Monetization | Paid | — |
| Best chart rank | **#20** | #131 |
| Size | 131 MB | 25 MB |
| Requires iOS | 15.5 | **11.0** |
| Devices | iPhone, iPad, iPod, Apple Watch | iPhone, iPad, iPod, Apple Watch |
| Age rating | 4+ | 12+ |
| Developer | [Ton Schalke](https://appshunter.io/developer/1139762357) | [Marina Sauca](https://appshunter.io/developer/1207544243) |

## What reviewers say

### Speech Assistant AAC

[App page](https://appshunter.io/ios/app/speech-assistant-aac/id1139762358)

**Currently charting:** #20 Top Paid · Medical, #196 Top Grossing · Medical (US App Store)

This text-to-speech app assists individuals with speech impairments by allowing them to create custom buttons with saved phrases for quick and easy communication. It offers extensive customization options for buttons, voices, and layout, and can be used during phone calls.

**Highlights:** Customizable phrase buttons with categories, Support for system and AI voices, Full-screen mode for large font display, Use during phone and FaceTime calls, Apple Watch integration, iCloud, Mail, and AirDrop backup

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

**In-app purchases:** none

**What reviewers like**

- 👍 Life-saver for communication
- 👍 Highly customizable
- 👍 Easy to use
- 👍 Affordable price
- 👍 Versatile across devices

**What reviewers complain about**

- 🐛 Inconsistent syncing
- 🐛 Issues with transparent backgrounds
- 🐛 Unpleasant default voices
- 🐛 Costly for some
- 🐛 Family sharing problems

**Reported bugs**

- Default category button cannot be deleted
- Images with transparent backgrounds turn white
- Color picker does not work
- Blank word slot in new subcategories cannot be deleted
- Recorded or imported audio on buttons doesn't play on phone calls

**Requested features**

- Ability to move sub-categories
- Toggle for reading category names
- Sub-sub-categories
- Option to choose image files
- Color picker for customization


### Ratio S/Z

[App page](https://appshunter.io/ios/app/ratio-sz/id1207544244)

**Currently charting:** #131 Top Paid · Medical (US App Store)

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

**In-app purchases:** none


## Frequently asked questions

### Is Speech Assistant AAC free?

Speech Assistant AAC costs $24.99, with no in-app purchases.

### Is Ratio S/Z free?

Ratio S/Z costs $2.99, with no in-app purchases.

### Do Speech Assistant AAC or Ratio S/Z have ads?

Neither Speech Assistant AAC nor Ratio S/Z shows ads.

### Which is updated more often, Speech Assistant AAC or Ratio S/Z?

Speech Assistant AAC ships an update every 3 weeks, and Ratio S/Z every 3 months. Most recently, Speech Assistant AAC was updated on November 6, 2026 and Ratio S/Z on November 6, 2026.

### Which is more popular, Speech Assistant AAC or Ratio S/Z?

Speech Assistant AAC currently peaks at #20 in the App Store charts, and Ratio S/Z at #131. Chart position reflects recent download velocity rather than total install base.

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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.*