# TD Talk vs SLP Test Prep

The clearest difference is in-app purchases: TD Talk at none against SLP Test Prep's 1. SLP Test Prep's advantage is device support (3 vs 1) and iOS requirement (15.1 vs 17.2). On price, update cadence and ads there is nothing between them.

Both are free to download. SLP Test Prep sells 1 one-off in-app purchase. TD Talk asks for nothing beyond the download.

TD Talk ships an update every 2 months, SLP Test Prep every 3 months. The most recent releases landed on October 20, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | TD Talk | SLP Test Prep |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.1 (10 ratings)](https://appshunter.io/ios/app/td-talk/id1509210085/reviews)** | — |
| Number of ratings | **10** | — |
| Positive reviews | 75.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 3 months |
| Monetization | Free | — |
| Size | 305 MB | 24 MB |
| Requires iOS | 17.2 | **15.1** |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Tobii Dynavox LLC](https://appshunter.io/developer/446210474) | [SLP Test Prep](https://appshunter.io/developer/1875366120) |

## What reviewers say

### TD Talk

[App page](https://appshunter.io/ios/app/td-talk/id1509210085)

This app enables communication for individuals unable to use their voice or hands. It offers text-to-speech functionality through eye-tracking or touch input, supporting a wide range of languages and voices for natural conversation.

**Highlights:** Eye-tracking communication, Touch input for typing, Customized predictive sentence construction, In-sentence editing, 35+ languages and voices, Face-to-face conversation mode, QuickMessages for common phrases

**Features:** Vision Pro support

**In-app purchases:** none


### SLP Test Prep

[App page](https://appshunter.io/ios/app/slp-test-prep/id6758863917)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Access | $59.99 | one-time |


## Frequently asked questions

### Is TD Talk free?

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

### Is SLP Test Prep free?

SLP Test Prep is free to download, with in-app purchases available.

### Do TD Talk or SLP Test Prep have ads?

Neither TD Talk nor SLP Test Prep shows ads.

### Which is updated more often, TD Talk or SLP Test Prep?

TD Talk ships an update every 2 months, and SLP Test Prep every 3 months. Most recently, TD Talk was updated on October 20, 2026 and SLP Test Prep on October 22, 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.*