# Num Fu vs TD Snap®

The clearest difference is in-app purchases: Num Fu at none against TD Snap®'s 4. Num Fu also leads on device support (3 vs 1) and iOS requirement (6.0 vs 13.0). TD Snap®'s advantage is rating (4.1 vs 3.8) and ratings volume (882 vs 4). On price, review sentiment, update cadence and ads there is nothing between them.

Both are free to download. TD Snap® sells 4 in-app purchases, starting at $4.99 per month. Num Fu asks for nothing beyond the download.

TD Snap® holds the better App Store score, 4.1 against 3.8. That said, the two scores are not equally well evidenced: TD Snap® has 882 ratings behind it against 4, so its average is the more settled of the two. Written reviews complicate that: 33% of Num Fu's written reviews are positive against 31% of TD Snap®'s, so the app with the better star average is not the one people write more warmly about.

Num Fu ships an update every 3 months, TD Snap® every 2 months. The most recent releases landed on November 1, 2026 and November 11, 2026 respectively.

## The numbers

| Metric | Num Fu | TD Snap® |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.8 (4 ratings)](https://appshunter.io/ios/app/num-fu-addition/id981031137/reviews) | **[4.1 (882 ratings)](https://appshunter.io/ios/app/td-snap/id1072799231/reviews)** |
| Number of ratings | 4 | **882** |
| Positive reviews | **33.3% of reviews** | 30.7% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | **Free** | Subscription |
| Size | 224 MB | 3.4 GB |
| Requires iOS | **6.0** | 13.0 |
| Devices | **iPhone, iPad, iPod** | iPad |
| Age rating | 4+ | 4+ |
| Developer | [ORIGO Education](https://appshunter.io/developer/693416241) | [Tobii Dynavox LLC](https://appshunter.io/developer/446210474) |

## What reviewers say

### Num Fu

[App page](https://appshunter.io/ios/app/num-fu-addition/id981031137)

Master basic addition facts through engaging educational games. This app utilizes proven addition strategies to help students build number sense and fluency in a fun, interactive way.

**Highlights:** Addition fact practice, ORIGO Education strategies, Fun educational games, Number sense development, Mastery of math facts

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 (4)**

| 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 |

**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 Num Fu free?

Num Fu is free to download, with no in-app purchases.

### Is TD Snap® free?

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

### Which has better reviews, Num Fu or TD Snap®?

TD Snap® is rated higher. Num Fu averages 3.8 out of 5 from 4 ratings, while TD Snap® averages 4.1 from 882 ratings.

### Do Num Fu or TD Snap® have ads?

Neither Num Fu nor TD Snap® shows ads.

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

Num Fu ships an update every 3 months, and TD Snap® every 2 months. Most recently, Num Fu was updated on November 1, 2026 and TD Snap® on November 11, 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.*