King vs Constant Therapy Clinician
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
King
This app provides a quick and objective sideline concussion screening test for athletes. It helps identify potential concussions by assessing eye movements, attention, and concentration through a simple number-reading exercise. Requires an existing King-Devick Online account.
- Objective sideline concussion screening
- Assess eye movements and attention
- Administer baseline and post-injury tests
- Works offline
- Suitable for ages 5+
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This app is intended ONLY for users with an existing King-Devick Online account. The King-Devick Concussion Screening Test is an objective, remove-from-play sideline concussion screening test which can be administered by parents, coaches, athletic trainers or medical professionals in minutes. Peer reviewed published research has shown that the King-Devick Test is an accurate and reliable method to help identify athletes with concussion on the sidelines. It has particular relevance to sports such as football, hockey, soccer, and basketball in addition to all other contact or collision activities on the field or at home. The test involves reading aloud a series of single digit numbers from left to right on three test cards. The King-Devick can detect impairment of eye movements, attention, language, concentration and other areas which correlate with concussion. How does King-Devick Test work? -King-Devick Test account holders get unlimited concussion screening per athlete per year. -With the King-Devick Test App, you can administer baseline and post-injury assessments even when WiFi is not available. -All athletes establish a pre-season or pre-injury baseline test score annually. -Concussion screening for athletes as young as 5 years old.
Constant Therapy Clinician
This app provides evidence-based speech, language, and cognitive therapy exercises for patients recovering from neurological conditions. It offers AI-driven customizable home exercise programs and detailed reporting features for clinicians.
- Evidence-based therapy library
- AI-driven customizable home exercise programs
- Speech, language, and cognitive skill-building
- Progress tracking and reporting
- HIPAA compliant enterprise license
- Multi-language support
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Constant Therapy Clinician is an evidence-based cognitive, speech language therapy exercise program developed by neuroscientists and speech therapists from Boston University. Deliver science-based exercises in the clinic, and enable your clients' progress at home with an AI-driven customizable Home Exercise program. Provide comprehensive therapy for stroke, traumatic brain Injury (TBI), aphasia, apraxia, dementia & other neurological conditions, and join 800,000+ users who have completed 350 million+ speech therapy, language and cognitive exercises. Standardize therapy and data reporting across your health system with our Enterprise license that supports HIPAA compliance, enterprise-grade security and access control. BENEFITS [Available in English dialects (US, UK, Australia, India) & US Spanish] • Access the world’s most comprehensive evidence-based exercise library: 1 Million+ exercises across 91 domains of speech, language and cognitive therapy. • Engage aphasia, stroke, TBI, apraxia, dementia clients in therapy sessions with unlimited activities in speaking, memory, attention, reading, writing, language, math, attention, comprehension, problem solving, visual processing, auditory memory, and daily-living skills. • Save 15 mins per session on client prep, data reporting, and discharge summaries with detailed reporting features. • Provide customized Home Exercise Programs and carryover exercises for stroke, brain injury and aphasia recovery with 1-click, saving time and effort. • Improve outcomes with AI powered Home Exercise Programs that automatically progress with your clients' needs. • Enable aphasia, brain injury, stroke and dementia clients to progress with speech therapy exercises at home, between clinic sessions, and after discharge. • Review client performance and exercise compliance in speech language therapy and occupational therapy to inform clinical decisions. • Get enterprise-grade documentation, security, centralized management & access control for HIPAA compliance with Constant Therapy's Enterprise license. • Easily populate data into your EMR/EHR system. Constant Therapy Clinician is free for personal use by clinicians, educators, and researchers. Clinicians at HIPAA-compliant institutions should utilize the app with an Enterprise subscription. THE SCIENCE BEHIND CONSTANT THERAPY: Constant Therapy was designed by clinicians and scientists at Boston University specifically to target the challenges of recovery after stroke, traumatic brain injury, aphasia, apraxia, dementia or other neurological disorders. It tracks user progress across functional domains such as: language, cognition, memory, speech, attention, comprehension and visual processing. Constant Therapy sets the gold standard with the most comprehensive science-based exercise library that is based on 70+ published research studies. Studies show that users enabled with Constant Therapy are more engaged and practice 5x more speech, language and cognitive therapy exercises. Research shows Constant Therapy's effectiveness for aphasia, stroke, TBI, and dementia populations. See constanttherapyhealth.com/science/ Constant Therapy advances rehabilitation science through collaboration with researchers at University of Texas, Boston University, University of Washington and more. A multiple-award winner from Time Magazine, American Stroke Association, AARP and Hearst Health, Constant Therapy is recommended by tens of thousands of speech-language pathologists, neurologists, occupational therapists, and clinicians treating aphasia, stroke, TBI, dementia, and apraxia worldwide. CONTACT US: support@constanttherapy.com constanttherapy.com TERMS: constanttherapy.com/privacy/ constanttherapy.com/eula/ Constant Therapy is a tool to help practice cognitive exercises. It does not provide medical advice, diagnoses, or rehabilitation services, and does not guarantee improvements in brain function. It is not a substitute for professional medical or clinical care.
Screenshots
Verdict
The clearest difference is ratings volume: Constant Therapy Clinician at 726 against King's 2. Constant Therapy Clinician also leads on device support (3 vs 1). On price, rating, 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. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 5.0 for King against 4.9 for Constant Therapy Clinician. That said, the two scores are not equally well evidenced: Constant Therapy Clinician has 726 ratings behind it against 2, so its average is the more settled of the two.
King ships an update every 2 months, Constant Therapy Clinician every 3 months. The most recent releases landed on October 29, 2026 and November 3, 2026 respectively.
| Parameter | King | Constant Therapy Clinician |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | 4.9 (726 ratings) |
| Positive reviews | — | 92.9% of reviews |
| Number of ratings | 2 | 726 — better |
| Update frequency | Every 2 months — better | Every 3 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPad | iPhone, iPad, iPod — better |
| Requires iOS | 9.0 — better | 9.3 |
| Further details — not scored | ||
| Size | 243 MB | 83 MB |
| Age rating | 4+ | 4+ |
| Developer | King-Devick Test, LLC | Constant Therapy, Inc. |
Customer experience
King
Constant Therapy Clinician
Bugs and requests
King
Not enough reviews yet to summarise bugs or requests.
Constant Therapy Clinician
Reported bugs
1 issue- Client can mark themselves as correct inaccurately
Requested features
5 requests- Functional daily life pictures for naming
- Sequencing steps for naming
- Simple verbal problem-solving tasks
- Option to print materials
- Way for clinician to know if Pt scored item as correct when app marked incorrect
In-app purchases
King
No in-app purchases
Constant Therapy Clinician
No in-app purchases






