ImPACT Toolkit vs King
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ImPACT Toolkit
This application allows healthcare professionals to administer concussion evaluation tests. It supports online and offline administration of ImPACT, ImPACT Pediatric, and ImPACT Quick Test, with results uploaded to a central database. A customer account is required for use.
- Administer ImPACT tests
- Administer ImPACT Pediatric tests
- Administer ImPACT Quick Test
- Online and offline test administration
- Upload test results to database
- Record concussion evaluation findings
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ImPACT Toolkit™ is an application for use by customers of ImPACT Applications, Inc. to administer ImPACT®, ImPACT Pediatric® or ImPACT Quick Test®, and to record concussion evaluation findings. ImPACT, ImPACT Pediatric, and ImPACT Quick Test can be administered online and offline. Completed test results are uploaded to the ImPACT Applications database. ImPACT Toolkit is for test administration only; management and reporting of completed and uploaded test results is done in the ImPACT Applications Customer Center. • To use ImPACT Toolkit, you must have an ImPACT Applications Customer Center account • Some features require an active network connection (Wi-Fi or Cellular) • ImPACT Toolkit can only be used to administer ImPACT, ImPACT Pediatric or ImPACT Quick Test
King
This app helps individuals with a history of migraines detect the early prodrome phase before a headache begins. It uses a guided eye movement test with automated speech recognition to analyze performance and compare it to past results, potentially aiding in timely treatment.
- Migraine prodrome detection
- Saccadic eye movement test
- Automated speech recognition analysis
- Comparison to historical test data
- Guided test administration
- Early intervention support
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The easy-to-use King-Devick Migraine Headache Early Detection (MiHED™) iPad App is intended for use by an individual with a history of Migraine Headache in order to detect the prodrome (pre-headache) phase of a migraine attack. The prodrome often occurs 1-6 hours prior to the headache phase of the migraine attack. This product may therefore forecast an oncoming migraine headache. Peer reviewed published research has shown that administering certain migraine headache treatment medication in the prodromal (pre-headache) stage can be effective in reducing the effects of, or even preventing the migraine headache attack. The App will guide individuals through the King-Devick Test. It is a test of saccadic eye movements which requires users to read aloud randomly spaced single-digit numbers as quickly and accurately as possible on three progressively more difficult screen patterns. Peer reviewed published research has shown by using innovative automated speech recognition technology, the App will instantly analyse a user’s King-Devick Test performance and compare results to any previous King-Devick Test history available. Subscribers will be able to administer unlimited King-Devick Tests for one individual. Please note, this App is only compatible with iPad, iPad Air and iPad Pro (not compatible with iPhone or iPad Mini). MiHED should only be used in conjunction with professional medical advice, diagnosis, or treatment and not as a substitute or a replacement for it. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is rating: King at 5.0 against ImPACT Toolkit's 3.0. ImPACT Toolkit's advantage is in-app purchases (none vs 1) and device support (3 vs 1). On price, ratings volume, 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. King sells 1 in-app purchase, starting at $7.99 per month. ImPACT Toolkit asks for nothing beyond the download.
King holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 2 and 2 respectively.
ImPACT Toolkit ships an update every 4 months, King every 2 months. The most recent releases landed on October 26, 2026 and November 2, 2026 respectively.
| Parameter | ImPACT Toolkit | King |
|---|---|---|
| Price | Free | Free |
| Rating | 3.0 (2 ratings) | 5.0 (2 ratings) — better |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 2 | 2 |
| Update frequency | Every 4 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPad |
| Requires iOS | 12.0 | 12.0 |
| Further details — not scored | ||
| Size | 205 MB | 220 MB |
| Age rating | 17+ | 12+ |
| Developer | ImPACT Applications, Inc. | King-Devick Test, LLC |
Customer experience
ImPACT Toolkit
King
In-app purchases
ImPACT Toolkit
No in-app purchases
King
- 1 Month Subscription$7.991 Month





