Comparison

HemiStim vs Language Therapy Lite

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

Head to head
About

HemiStim

This app offers visual stimulation for specific brain lobes, aiding in hemispheric connectivity. It utilizes color patterns and eye-tracking exercises for targeted left or right brain stimulation, controllable via simple taps and swipes. Therapy sessions are automatically tracked and can be emailed to clinicians.

Highlights
  • Visual stimulation of frontal, parietal, occipital, temporal lobes
  • Hemispheric brain stimulation
  • Color pattern selection
  • Eye tracking for saccadic and pursuit movements
  • Adjustable blink rate and timer
  • Automatic therapy session tracking
  • Clinician-patient email communication
Features
Currently charting
Read full description

Hemistim can be used as a visual stimulation of areas of the frontal, parietal, occipital, and temporal lobes hemispherically. It is a specific brain stimulation which is rarely used in conjunction with other treatments but can be used as a portion of a home-based program or an office-based program. Such usage may lead to improved hemispheric connectivity specific, targeted areas of the brain and its connections to the parietal/temporal or frontal cortices. Hemistim provides a visual stimulation through utilizing color patterns and eye tracking that can be used for specific left or right visual exercise. The stimulus is recognized and  interpreted by the contralateral (opposite) occipital lobe. Pursuit and saccadic eye movements are created by targeting on the moving object. Pursuit away from and saccade towards the alternating squares are initiated by the ipsilateral (same side) parietal and frontal cortex, respectively.  This gives the doctor the ability to work the frontal, parietal, occipital, and temporal lobes hemispherically.  HemStim is easy to use. Swipe left or right to select a different colored pattern. Multiple patterns are available. Tap a pattern to make it begin blinking. The pattern will blink until the timer stops it. Double tapping the pattern will also make it stop. The blink rate and timer can be changed using the sliders. Target motion is controlled by the tapping the small target to the right of the speed control. Choose among no motion, saccade, and pursuit by successive taps on the small target. Exterior motion is indicated by purple arrows on the target and interior motion by white arrows. The new Saccades screen only displays target motion. Drag the purple target with one finger to set the direction and length of its motion. Tap the screen once simultaneously with two fingers to switch between saccades, a dashed line, and pursuits, a solid line. Tap the screen once with one finger to start the saccades or pursuits. Double tap the screen with one finger to stop the target motion. HemiStim automatically tracks therapy sessions, recording all pertinent information about each one. Maintain close communication between clinician and patient via email.

About

Language Therapy Lite

This app offers scientifically proven speech therapy exercises to improve reading, writing, speaking, and listening for individuals with aphasia. It provides a free sample of activities designed by experts to aid recovery from stroke or brain injury.

Highlights
  • Reading comprehension exercises
  • Word-finding practice
  • Phrase and sentence reading
  • Spelling and writing practice
  • Adjustable difficulty
  • Customizable activities
  • Score reports
Read full description

Harness the power of a scientifically proven 4-in-1 speech therapy app that boosts reading, writing, speaking, and listening in people with aphasia. Whether you’re recovering from a stroke or brain injury, Language Therapy can help. TRY THIS APP FOR FREE! Language Therapy Lite is a free sample of the activities found in the full version of Language Therapy. You’ll get 5-7 exercises in each activity to see if this is the right app for you. STUDIES SHOW… IT WORKS! Struggling with language can feel like being trapped in your own mind. But there’s an answer. Research at the University of Cambridge showed improvement in every single participant with chronic aphasia who used this app for 20 minutes a day over 4 weeks. Get real results that last.* - Overcome aphasia and boost language skills with a proven app designed by experts - Enhance speech therapy with countless activities that are perfect for clinical and home use - Learn in 5 languages: US or UK English, Spanish, German, French - Get a toolkit that’s faster and more adaptable than photo cards, letter tiles, and other therapy aids - Use score reports and adjustable options to seamlessly fit the app into your therapy program - Fully customize your activities by adding your own words, pictures, prompts, or sounds - No subscriptions, ever – our best-selling app will always be there when you need it ** THERE’S NO BETTER TIME TO START. Try it now for FREE with Language Therapy Lite! ** HERE’S WHAT YOU GET IN ONE EASY PACKAGE: COMPREHENSION THERAPY – IMPROVE YOUR UNDERSTANDING Build listening and reading comprehension skills for nouns, verbs, and adjectives. Take the first step in your aphasia recovery with an app that automatically adjusts difficulty based on performance. 3 ACTIVITIES: Listen | Read | Listen & Read NAMING THERAPY – FIND THE RIGHT WORDS Practice naming and improve word-finding skills. In 4 activities, you do everything from naming the things you see to describing their features, all with cues and hints to guide you. Build independence by learning strategies to communicate your thoughts and needs. 4 ACTIVITIES: Naming Practice | Describe | Naming Test | Flashcards READING THERAPY – TAKE YOUR READING TO THE NEXT LEVEL Strengthen literacy with phrase and sentence exercises in an app that’s perfect for independent practice. Improve attention to detail, practice oral reading, and build on the single words of Comprehension Therapy as you move toward the more advanced reading skills needed for independent living. 4 ACTIVITIES: Phrase Matching | Phrase Completion | Sentence Matching | Sentence Completion WRITING THERAPY – BOOST YOUR SPELLING SKILLS Improve spelling ability by practicing completing and building the words you hear and see. Pick letters from a limited choice or full alphabet, then place and rearrange them at will for an intuitive and challenging experience. The perfect spelling practice is waiting. 4 ACTIVITIES: Fill in the Blank | Copy | Spell What You See | Spell What You Hear IN ALL 4 OF LANGUAGE THERAPY’S APPS, YOU GET: - 700+ core nouns, verbs, and adjectives that run throughout all 4 apps - Thousands of exercises for countless hours of practice - Recommendations on what to do next based on your score - Activities for people struggling with aphasia after stroke or brain injury, autism, or just learning a new language - Simple, distraction-free interfaces that are easy to use for all ages and abilities - No subscriptions, no monthly bills, no Wi-Fi needed WHY WASTE YOUR TIME ON APPS THAT DON’T WORK? Download Language Therapy and watch the improvement begin. Looking for something different in a speech therapy app? Find the right apps for you at tactustherapy.com/find *Every person and every brain is different. Your results may vary.

Screenshots

HemiStim3 screens
Language Therapy Lite4 screens

Verdict

The call

The clearest difference is review sentiment: Language Therapy Lite at 90% against HemiStim's 38%. Language Therapy Lite also leads on price (Free vs $9.99) and rating (4.7 vs 2.4). HemiStim's advantage is chart position (#196 vs unranked). On ads, in-app purchases and device support 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

Language Therapy Lite is free to download; HemiStim costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Language Therapy Lite holds the better App Store score, 4.7 against 2.4. That said, the two scores are not equally well evidenced: Language Therapy Lite has 1.3K ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 38% of HemiStim's written reviews are positive against 90% of Language Therapy Lite's.

UpkeepUpdate frequency

HemiStim ships an update every 8 months, Language Therapy Lite every 4 months. The most recent releases landed on September 14, 2026 and September 19, 2026 respectively.

Scorecard8 real differences · 3 level
HemiStim versus Language Therapy Lite: the parameters behind the verdict, then further details
ParameterHemiStimLanguage Therapy Lite
Price$9.99Free — better
Rating2.4 (5 ratings)4.7 (1.3K ratings) — better
Positive reviews37.5% of reviews89.5% of reviews — better
Number of ratings51.3K — better
Update frequencyEvery 8 monthsEvery 4 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree with in-app purchases — better
Best chart rank#196 — better—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.09.0 — better
Further details — not scored
Size1 MB114 MB
Age rating4+4+
DeveloperLinsay Associates, LLCTactus Therapy Solutions Ltd.

Customer experience

HemiStim

All ratings5 ratings
Positive40.0%
Neutral0.0%
Negative60.0%
Written reviews8 reviews
Positive37.5%
Neutral12.5%
Negative50.0%

Language Therapy Lite

All ratings1,293 ratings
Positive93.1%
Neutral3.7%
Negative3.2%
Written reviews86 reviews
Positive89.5%
Neutral2.3%
Negative8.1%

Bugs and requests

HemiStim

Not enough reviews yet to summarise bugs or requests.

Language Therapy Lite

Reported bugs

3 issues
  • Login screen freezes
  • Incompatible with older devices
  • Icon is blank after last update

Requested features

2 requests
  • Add audio support for all features
  • Improve navigation and home screen functionality

In-app purchases

None

HemiStim

No in-app purchases

None

Language Therapy Lite

No in-app purchases

Questions

Is HemiStim free?
HemiStim costs $9.99, with no in-app purchases.
Is Language Therapy Lite free?
Language Therapy Lite is free to download, with no in-app purchases.
Which has better reviews, HemiStim or Language Therapy Lite?
Language Therapy Lite is rated higher. HemiStim averages 2.4 out of 5 from 5 ratings, while Language Therapy Lite averages 4.7 from 1.3K ratings.
Do HemiStim or Language Therapy Lite have ads?
Neither HemiStim nor Language Therapy Lite shows ads.
Which is updated more often, HemiStim or Language Therapy Lite?
HemiStim ships an update every 8 months, and Language Therapy Lite every 4 months. Most recently, HemiStim was updated on September 14, 2026 and Language Therapy Lite on September 19, 2026.

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