Comparison

MN Executive Function Scale vs TD Snap®

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

MN Executive Function Scale

This app provides a brief, standardized assessment of executive function skills for ages 2 and up. Developed by neuroscience experts, it uses an engaging virtual card-sorting game to measure cognitive flexibility, working memory, and inhibitory control. Results are accessible via a secure web portal for tracking growth and early detection of difficulties.

Highlights
  • Standardized executive function assessment
  • Virtual card-sorting game
  • Adaptive to individual ability
  • Measures cognitive flexibility, working memory, inhibitory control
  • Secure web portal for score access and tracking
  • Early detection of EF difficulties
  • Formative assessment for educational programs
Features
Read full description

The Minnesota Executive Function Scale (MEFS) is a subscription service for assessing executive function skills using a brief, standardized instrument administered on an iPad®. Executive function refers to the neuro-cognitive skills needed for successful learning and performance in school, at work, and in life. They include cognitive flexibility, working memory, and inhibitory control. How does the MEFS work? The MEFS is easy to use, but is intended to be administered only by trained and certified examiners. That is how you can be sure the MEFS results and norms are reliable and valid. The App will be fully accessible to subscribing organizations with secure login credentials provided by Reflection Sciences upon signed user license agreement. FEATURES + Created by leading research experts in developmental neuroscience + Early childhood version designed for ages 2-7 + Select an avatar to play along + Virtual card-sorting game with 7 levels of challenge + Intuitive drag and drop responses + Adaptive to individual EF ability + Takes 3 to 7 min to complete (average 4 min) + Reliable, valid, and normed + Backed by a secure web portal to immediately access scores and track growth on individuals or groups + Screening provides early detection of potential EF difficulties + Formative assessment complements educational curricula and programs designed to improve EF skills + Youth and Adult U.S. norms based on over 34,000 individuals

About

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.

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
Read full description

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.

Verdict

The call

The clearest difference is rating: TD Snap® at 4.1 against MN Executive Function Scale's 3.0. TD Snap® also leads on ratings volume (856 vs 2) and iOS requirement (13.0 vs 15.1). MN Executive Function Scale's advantage is in-app purchases (none vs 10) and review sentiment (50% vs 31%). On price, update cadence, ads and monetization model 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

CostPrice · In-app purchases · Ads · Monetization

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

ReceptionRating · Positive reviews · Number of ratings

TD Snap® holds the better App Store score, 4.1 against 3.0. That said, the two scores are not equally well evidenced: TD Snap® has 856 ratings behind it against 2, so its average is the more settled of the two. Written reviews complicate that: 50% of MN Executive Function Scale'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.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 2, 2026 and October 13, 2026 respectively.

Scorecard5 real differences · 5 level
MN Executive Function Scale versus TD Snap®: the parameters behind the verdict, then further details
ParameterMN Executive Function ScaleTD Snap®
PriceFreeFree
Rating3.0 (2 ratings)4.1 (856 ratings) — better
Positive reviews50.0% of reviews — better30.7% of reviews
Number of ratings2856 — better
Update frequencyEvery 2 monthsEvery 2 months
AdsNoNo
In-app purchasesNo — betterYes
MonetizationSubscriptionSubscription
DevicesiPadiPad
Requires iOS15.113.0 — better
Further details — not scored
Size31 MB3.4 GB
Age rating4+4+
DeveloperReflection Sciences LLCTobii Dynavox LLC

Customer experience

MN Executive Function Scale

All ratings2 ratings
Positive50.0%
Neutral0.0%
Negative50.0%
Written reviews2 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

TD Snap®

All ratings856 ratings
Positive77.1%
Neutral6.3%
Negative16.6%
Written reviews179 reviews
Positive30.7%
Neutral5.6%
Negative63.7%

Bugs and requests

MN Executive Function Scale

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

None

MN Executive Function Scale

No in-app purchases

10 purchases

TD Snap®

Subscriptions4
  • Gateway Monthly1 Month trial$4.991 Month
  • PODD Monthly1 Month trial$4.991 Month
  • Metacom Monthly1 Month trial$4.991 Month
Show 1 more
  • Speaking Upgrade Monthly1 Month trial$9.991 Month
One-time6
  • Acapela Voices$39.99
  • Nuance Voices$39.99
  • Speaking Upgrade$49.99
Show 3 more
  • METACOM Symbols$49.99
  • PODD Page Sets$149.99
  • Gateway Page Sets$149.99

Questions

Is MN Executive Function Scale free?
MN Executive Function Scale 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, MN Executive Function Scale or TD Snap®?
TD Snap® is rated higher. MN Executive Function Scale averages 3.0 out of 5 from 2 ratings, while TD Snap® averages 4.1 from 856 ratings.
Do MN Executive Function Scale or TD Snap® have ads?
Neither MN Executive Function Scale nor TD Snap® shows ads.
Which is updated more often, MN Executive Function Scale or TD Snap®?
MN Executive Function Scale ships an update every 2 months, and TD Snap® every 2 months. Most recently, MN Executive Function Scale was updated on October 2, 2026 and TD Snap® on October 13, 2026.

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