# TD Snap® vs Stroop Effect

The clearest difference is in-app purchases: Stroop Effect at none against TD Snap®'s 10. Stroop Effect also leads on device support (3 vs 1) and iOS requirement (11.0 vs 13.0). TD Snap®'s advantage is update cadence (every 2 months vs every 10 months). On price and ads there is nothing between them.

Both are free to download. TD Snap® sells 10 in-app purchases, starting at $4.99 per month. Stroop Effect asks for nothing beyond the download.

TD Snap® ships an update every 2 months, Stroop Effect every 10 months. The most recent releases landed on September 21, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | TD Snap® | Stroop Effect |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.2 (810 ratings)](https://appshunter.io/ios/app/td-snap/id1072799231/reviews)** | — |
| Number of ratings | **810** | — |
| Positive reviews | 29.6% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 10 months |
| Monetization | Subscription | — |
| Size | 3.4 GB | 58 MB |
| Requires iOS | 13.0 | **11.0** |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Tobii Dynavox LLC](https://appshunter.io/developer/446210474) | [Michal Mandrysz](https://appshunter.io/developer/454758944) |

## What reviewers say

### TD Snap®

[App page](https://appshunter.io/ios/app/td-snap/id1072799231)

This communication software assists individuals with speech and language disabilities by offering symbol-supported and text-based communication options. It features customizable page sets and editing tools, accessible via touch, eye gaze, and switch access. A subscription is required after a trial period.

**Highlights:** Symbol-supported and text-based page sets, Customizable editing tools, Touch, eye gaze, and switch access, Picture Communication Symbols library, Visual schedules and timers, Cloud-based content syncing

**Features:** Family Sharing

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Gateway Monthly | $4.99 | per month |
| PODD Monthly | $4.99 | per month |
| Metacom Monthly | $4.99 | per month |
| Speaking Upgrade Monthly | $9.99 | per month |
| Acapela Voices | $39.99 | one-time |
| Nuance Voices | $39.99 | one-time |
| Speaking Upgrade | $49.99 | one-time |
| METACOM Symbols | $49.99 | one-time |
| PODD Page Sets | $149.99 | one-time |
| Gateway Page Sets | $149.99 | one-time |

**What reviewers like**

- 🚀 Easy to use
- 👍 Customizable
- 🚀 Intuitive navigation
- 👍 Helpful supports and features
- 🚀 Flexible and robust

**What reviewers complain about**

- 🔒 Subscription model for voice
- 🐛 Voice issues after updates
- 💰 Expensive subscription
- 🔒 Removing previously paid features
- 🐛 Crashes and bugs

**Reported bugs**

- Voice disappearing after updates
- Crashes on launch
- Incompatibility with iPad Pro
- Inability to restore purchased content

**Requested features**

- Ability to change undo symbol
- Link to ACCIL image database
- Ability to set user age for appropriate vocabulary
- More robust core vocabulary
- Easier grammar modeling


### Stroop Effect

[App page](https://appshunter.io/ios/app/stroop-effect-tot/id1443395928)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is TD Snap® free?

TD Snap® is free to download, with in-app purchases available.

### Is Stroop Effect free?

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

### Do TD Snap® or Stroop Effect have ads?

Neither TD Snap® nor Stroop Effect shows ads.

### Which is updated more often, TD Snap® or Stroop Effect?

TD Snap® ships an update every 2 months, and Stroop Effect every 10 months. Most recently, TD Snap® was updated on September 21, 2026 and Stroop Effect on September 20, 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.*