Comparison

Constant Therapy vs RayLimit

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

Head to head
About

Constant Therapy

This app provides science-based cognitive, language, and speech therapy exercises for individuals recovering from neurological conditions like stroke, TBI, and aphasia. It offers personalized, AI-guided activities to improve memory, communication, attention, and more, accessible anytime and anywhere.

Highlights
  • Customized AI-guided therapy exercises
  • Speech and cognitive skill-building
  • Progress monitoring and reports
  • Supplement in-clinic therapy
  • Large library of evidence-based activities
  • Live customer support
Features
Read full description

Constant Therapy is an award-winning, science-based exercise app for cognitive, language, and speech practice — built for people living with aphasia, apraxia, dementia, stroke, traumatic brain injury (TBI), or other neurological conditions. Join a community of 800,000+ users who have completed 350 million+ science-based practice exercises. Get unlimited AI-guided exercises you can do anytime, anywhere — a helpful way to get more exercise practice between speech therapy, occupational therapy or neurology appointments. AVAILABLE IN English dialects (US, UK, Australia, India) & US Spanish. Constant Therapy is built for people who want to: – Practice finding words, speaking and improve communication despite aphasia – Work on everyday math and problem-solving skills affected after a stroke or brain injury – Strengthen memory with structured cognitive exercises for dementia or memory loss – Regain confidence in doing everyday activities like reading menus, maps, and understanding phone messages – Improve attention and executive functioning with daily practice after a stroke – Get more aphasia, apraxia, or cognitive exercise practice between speech therapy or occupational therapy appointments – Support a loved one who has run out of speech-language therapy or occupational therapy but needs more day-to-day practice FEATURES & BENEFITS • For people with aphasia, apraxia, dementia, stroke, TBI, or other neurological conditions: choose your speech, language and cognitive goals, and get customized, ever-adjusting exercises based on your needs • Practice speaking, memory, attention, reading, writing, language, math, comprehension, problem solving, visual processing, auditory memory, and other functional skills • Use independently at home, alongside in-clinic speech-language pathology or occupational therapy, or add your clinician to follow your progress • Ideal for people who want daily home exercises to supplement aphasia therapy, dementia therapy, speech-language therapy, or cognitive therapy from a licensed professional • Friendly, live customer support trained to work with people who have cognitive and communication challenges • Track progress with clear, easy-to-understand performance summaries • Access the world’s most comprehensive evidence-based exercise library: 1 million+ exercises across 90+ practice areas covering speech, language and cognitive skills • Try free for 14 days before you subscribe THE SCIENCE BEHIND CONSTANT THERAPY Constant Therapy’s exercise library is grounded in 70+ published research studies; and 19 clinical studies have examined its use by people with aphasia, apraxia, dementia, stroke and traumatic brain injury. Studies show that users enabled with Constant Therapy get 5x more speech, language and cognitive exercise practice; and show better outcomes. See the research at constanttherapyhealth.com/science/ Constant Therapy was built by clinicians and scientists at Boston University specifically around the practice needs of people with aphasia, apraxia, dementia, stroke, brain injury, and other neurological conditions. It tracks progress across a wide range of functional skills that are important to help people live independently and age at home. A multiple award-winner recognized by Hearst Health, Time Magazine, the American Stroke Association, and AARP, Constant Therapy is used and recommended by tens of thousands of speech-language pathologists, occupational therapists and neurologists. SIGN UP FOR A FREE 14-DAY TRIAL 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. Always consult your licensed healthcare provider before making any health-related decisions.

About

RayLimit

Features
Read full description

Whether you want a natural golden tan, need to hit your daily vitamin D goals, or just want to get outside safely — RayLimit tells you exactly how long to stay in the sun, based on science. KEY FEATURES: SMART SUN TIMER Start a session and RayLimit counts down your safe exposure window in real time. Get notified before you burn — not after. SUNSCREEN SCANNER Scan your sunscreen or tanning oil to instantly analyze its ingredients. RayLimit highlights potential risks, flags harmful or controversial components, and helps you make safer choices for your skin. PERSONALIZED TO YOUR SKIN Input your skin type, existing tan level, and current UV index. RayLimit calculates your personal burn time and vitamin D production — no guesswork. UV INDEX MONITORING See real-time UV conditions for your location. Know exactly when the sun is strong enough to matter — and when it's time to seek shade. VITAMIN D TRACKER Track daily vitamin D from sun sessions and supplements. See your running total and know when you've hit your healthy daily target. TANNING ROUTINES Pick from built-in routines like “Quick Flip” or “Shade Break,” or create your own step‑by‑step routine. Get timed cues for flips, sides, and breaks so your tan develops evenly and safely. SMART REMINDERS Get alerts to flip, reapply sunscreen, or wrap up your session — all timed to your session, not just a generic clock. SESSION HISTORY Review past sun sessions, track your tanning progress, and build smarter habits over time. WHO IT'S FOR → Tanners who want color without the burn → Health-conscious people monitoring vitamin D levels → Outdoor lovers: hikers, runners, beach-goers → Anyone recovering from vitamin D deficiency PRIVACY FIRST Your data stays on your device. No account required to get started. Download RayLimit free and take control of your sun time — safely, smartly, and on your terms. Disclaimer: RayLimit is for informational purposes only and is not a substitute for medical advice. Always consult a healthcare professional

Screenshots

Constant Therapy4 screens
RayLimit4 screens

Verdict

The call

The clearest difference is iOS requirement: Constant Therapy at 9.3 against RayLimit's 18.6. On price, update cadence, ads and in-app purchases 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. Constant Therapy sells 10 in-app purchases, starting at $19.99 per month and RayLimit sells 2 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Constant Therapy ships an update every 2 months, RayLimit every 3 months. The most recent releases landed on October 15, 2026 and October 9, 2026 respectively.

Scorecard1 real difference · 9 level
Constant Therapy versus RayLimit: the parameters behind the verdict, then further details
ParameterConstant TherapyRayLimit
PriceFreeFree
Rating4.5 (4K ratings) — better—
Positive reviews77.0% of reviews—
Number of ratings4K — better—
Update frequencyEvery 2 months — betterEvery 3 months
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS9.3 — better18.6
Further details — not scored
Size90 MB140 MB
Age rating4+4+
DeveloperConstant Therapy, Inc.Teo Udovcic

Bugs and requests

Constant Therapy

Reported bugs

3 issues
  • Inconsistent voice recognition accuracy
  • Settings not remembered between sessions
  • Pricing information not easily accessible

Requested features

4 requests
  • More advanced and customizable exercises
  • Ability to bypass irrelevant questions
  • Better user progress tracking and reporting
  • Multilingual support

RayLimit

Not enough reviews yet to summarise bugs or requests.

In-app purchases

10 purchases

Constant Therapy

Subscriptions10
  • Auto-renewing Subscription$19.991 Month
  • Auto-renewing Subscription$24.991 Month
  • Auto-renewing Subscription14 Days trial$24.991 Month
Show 7 more
  • Auto-renewing Subscription$29.991 Month
  • Auto-renewing Subscription14 Days trial$29.991 Month
  • Auto-renewing Subscription$199.991 Year
  • Auto-renewing Subscription$249.991 Year
  • Auto-renewing Subscription14 Days trial$249.991 Year
  • Auto-renewing Subscription$299.991 Year
  • Auto-renewing Subscription14 Days trial$349.991 Year
2 purchases

RayLimit

Subscriptions2
  • RayLimit Premium3 Days trial$3.991 Month
  • RayLimit Premium3 Days trial$19.991 Year

Questions

Is Constant Therapy free?
Constant Therapy is free to download, with in-app purchases available.
Is RayLimit free?
RayLimit is free to download, with in-app purchases available.
Do Constant Therapy or RayLimit have ads?
Neither Constant Therapy nor RayLimit shows ads.
Which is updated more often, Constant Therapy or RayLimit?
Constant Therapy ships an update every 2 months, and RayLimit every 3 months. Most recently, Constant Therapy was updated on October 15, 2026 and RayLimit on October 9, 2026.

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