Num Fu vs TD Snap®
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Num Fu
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.
- Addition fact practice
- ORIGO Education strategies
- Fun educational games
- Number sense development
- Mastery of math facts
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Practise the art of Num Fu while mastering basic addition facts. Based on ORIGO Education's addition strategies, Num Fu allows students to master important number facts while playing fun educational games.
TD Snap®
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.
- 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
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TD Snap® is a flexible, robust communication software for people with speech and language disabilities such as autism, cerebral palsy and aphasia. Created by Tobii Dynavox, a leader in augmentative and alternative communication (AAC), TD Snap provides a choice of evidence-based, professionally developed page sets designed to meet different communication needs and preferences, with both symbol-supported and text-based options. TD Snap includes easy-to-use editing tools to create a personalized experience, and is accessible via touch, eye gaze and switch access methods. A monthly subscription is required to enable speech following a 1-month trial period. Tobii Dynavox offers complementary resources to help communicators, caregivers, and professionals succeed with TD Snap. These resources can be found by visiting myTobiiDynavox.com or tobiidynavox.com. Have you purchased a Tobii Dynavox device and looking to use your companion TD Snap license on an iOS device? Download this app and log into myTobiiDynavox in the start-up wizard. Customizable TD Snap Page Sets: • Core First: A symbol-supported page set enabling a path to literacy at any stage of language development, now also available in High contrast • Motor Plan: A symbol-supported page set enabling efficient language acquisition at any age, custom designed for both touch and eye gaze • Express: A symbol-supported page set to help people express themselves using theme-based phrases and words, now also available in bilingual Spanish/English • Text: A page set for those who are literate or transitioning from symbol supports to literacy • Scanning: A page set for those who use scanning as their primary access method, • Aphasia: A page set to help adults with aphasia communicate while also supporting language recovery , now also available in bilingual Spanish/English • PODD*: A page set based on the Pragmatic Organization Dynamic Display vocabulary strategy, developed by AAC expert Gayle Porter • Gateway*: A page set based on the Gateway vocabulary strategy, developed by Joan Bruno *Denotes in-app purchase of an additional monthly subscription per page or symbol set. Developed by a third party. Powerful Set of Integrated TD Snap Tools: • Editing: An intuitive editing tool to help customize buttons to meet a communicator’s unique needs • Diversity: A variety of diversity settings that let you customize skin tone, hair shades, and more • PCS: A built-in library of over 75,000 Picture Communication Symbols translated into over 25 languages • Search: A search bar to locate words and symbols with an easy and accessible path to find them • Visual Supports: A set of supports like visual schedules, timers, and scripts • Google Assistant: An integrated tool enabling symbol-supported access to Google Assistant • QuickFires: A set of commonly used pre-programmed phrases to make communication smoother • myTobiiDynavox: A cloud-based resource for backing up, sharing, and syncing customized content. How Subscriptions Work Following the 1-month free trial, your Apple ID payment method on file will automatically be charged monthly unless you cancel 24 hours before the trial ends. Subsequent monthly payments will be charged to your Apple ID payment method 24 hours before the end of each period. Your subscriptions are managed in account settings on the App Store. TD Snap® is a trademark and registered trademark of Tobii Dynavox AB. Tobii Dynavox cannot guarantee compatibility of TD Snap with any non-Tobii Dynavox brand of hardware and will not offer technical support for compatibility issues. All downloads are governed by TD Snap License Agreement for Download.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Num Fu | TD Snap® |
|---|---|---|
| Price | Free | Free |
| Rating | 3.8 (4 ratings) | 4.1 (882 ratings) — better |
| Positive reviews | 33.3% of reviews — better | 30.7% of reviews |
| Number of ratings | 4 | 882 — better |
| Update frequency | Every 3 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Subscription |
| Devices | iPhone, iPad, iPod — better | iPad |
| Requires iOS | 6.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 224 MB | 3.4 GB |
| Age rating | 4+ | 4+ |
| Developer | ORIGO Education | Tobii Dynavox LLC |
Customer experience
Num Fu
TD Snap®
Bugs and requests
Num Fu
Not enough reviews yet to summarise bugs or requests.
TD Snap®
Reported bugs
4 issues- Voice disappearing after updates
- Crashes on launch
- Incompatibility with iPad Pro
- Inability to restore purchased content
Requested features
5 requests- 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
In-app purchases
Num Fu
No in-app purchases
TD Snap®
- Gateway Monthly1 Month trial$4.991 Month
- PODD Monthly1 Month trial$4.991 Month
- Metacom Monthly1 Month trial$4.991 Month
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- Speaking Upgrade Monthly1 Month trial$9.991 Month









