# dob vs TD Snap®

The clearest difference is price: TD Snap® at Free against dob's $2.99. TD Snap® also leads on rating (4.2 vs 1.0) and review sentiment (30% vs 0%). On update cadence, ads, in-app purchases and device support there is nothing between them.

TD Snap® is free to download; dob costs $2.99 up front. dob sells 1 one-off in-app purchase and TD Snap® sells 10 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

TD Snap® holds the better App Store score, 4.2 against 1.0. That said, the two scores are not equally well evidenced: TD Snap® has 810 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 0% of dob's written reviews are positive against 30% of TD Snap®'s.

dob ships an update every 3 months, TD Snap® every 2 months. The most recent releases landed on June 11, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | dob | TD Snap® |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/dob-visual-perception/id981954512/reviews) | **[4.2 (810 ratings)](https://appshunter.io/ios/app/td-snap/id1072799231/reviews)** |
| Number of ratings | 1 | **810** |
| Positive reviews | 0.0% of reviews | **29.6% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | **Paid** | Subscription |
| Size | 78 MB | 3.4 GB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPad | iPad |
| Age rating | 4+ | 4+ |
| Developer | [Rene Fehr-Biscioni](https://appshunter.io/developer/969998405) | [Tobii Dynavox LLC](https://appshunter.io/developer/446210474) |

## What reviewers say

### dob

[App page](https://appshunter.io/ios/app/dob-visual-perception/id981954512)

This app offers exercises to train essential visual skills like attention, coordination, and memory. It's designed for learners of all ages, including children and individuals undergoing rehabilitation, and can be customized to individual needs.

**Highlights:** Visual Attention training, Ocular motility exercises, Hand and Eye Coordination, Motion Perception, Contrast Sensitivity, Face and facial expression recognition, Color Recognition and differentiation, Figure-Ground Perception

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| All exercises | $11.99 | one-time |


### 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


## Frequently asked questions

### Is dob free?

dob costs $2.99, and also offers in-app purchases.

### Is TD Snap® free?

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

### Which has better reviews, dob or TD Snap®?

TD Snap® is rated higher. dob averages 1.0 out of 5 from 1 ratings, while TD Snap® averages 4.2 from 810 ratings.

### Do dob or TD Snap® have ads?

Neither dob nor TD Snap® shows ads.

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

dob ships an update every 3 months, and TD Snap® every 2 months. Most recently, dob was updated on June 11, 2026 and TD Snap® on September 21, 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.*