Comparison

HemiStim vs Visual Attention 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

Visual Attention Therapy Lite

This app helps individuals with brain injuries, strokes, or attention deficits improve their scanning abilities and cognitive skills. It offers timed exercises and automated scoring to track progress in areas like reading, concentration, and processing speed.

Highlights
  • Improve scanning abilities
  • Assess for neglect
  • Practice left-to-right scanning
  • Timed exercises
  • Automated scoring and reports
  • Customizable layouts and difficulty
Read full description

Visual Attention Therapy helps brain injury and stroke survivors, as well as struggling students, to improve scanning abilities. It also helps rehab professionals to assess for neglect and provide more efficient and effective therapy for attention deficits. Visual Attention Therapy Lite gives you a free taste of the customization and utility of the full app: Visual Attention Therapy. This lite version lets you try Test and Practice modes with one level and layout, but is otherwise a fully functional app, allowing you to try 1 or 2 targets, all the signal and target colors and styles, and send e-mail reports. Practicing scanning from left to right across a page helps retrain the brain to move the eyes correctly. Strengthening this essential skill can improve reading, concentration, memory, attention to detail, and speed of processing. Using two targets at once can help users with working memory and alternating attention. 1) Use the Test mode to help determine if a scanning or attention deficit exists. 2) Use the Practice mode to train scanning to find targets in order. _______________________ CANCELLATION TASKS JUST GOT BETTER This professional cognitive training app takes traditional cancellation exercises, the evidence-based standard for testing and treating visuospatial neglect, and enhances them with benefits that are only available through technology: * Targets must be tapped from left to right, top to bottom in Practice mode, training users to slow down and scan the entire screen before they can move forward. * Sidebar signal can flash in a variety of colors to draw attention to the left or right. * Auditory and a variety of visual cues give instant feedback and keep users engaged. * Timed exercises increase motivation to work quickly and accurately. * No need to spend time counting errors. Automated scoring includes data for accuracy by quadrant, time for completion, and mistakes in professional e-mailed reports. * Adjustable layouts and 10 levels of difficulty allow you to customize the experience to meet changing needs or multiple users. * An endless variety of combinations eliminates the need to photocopy exercises and saves paper. Visual Attention Therapy was developed by a certified Speech-Language Pathologist and is used worldwide by SLPs, occupational therapists, vision specialists, and neuropsychologists to help adults and children with dyslexia, dementia, and attentional deficits. People of all ages enjoy racing against the clock to challenge themselves to improve on their scores while improving their cognitive and reading skills. Levels featuring letters can support literacy goals, while symbol-based levels challenge visual memory skills. _______________________ WHAT PEOPLE ARE SAYING “This app takes a simple, familiar format and turns it into a dynamic, interactive tool with the ability to be age appropriate for anyone from preschoolers to elderly adults.” —SLP “Visual Attention Therapy is guaranteed to be one of those beautiful apps that, when you see it and try it out, will make you exclaim 'Finally!' We were this close to hugging it, to be honest. Thanks for yet another amazing release, Tactus Therapy.” —SLP “I was not sure if children would be motivated to use this app, but the 'no nonsense' approach really seemed to help the children with their attention & task persistence. They especially enjoyed the immediate feedback they got regarding their speed & accuracy. I recommend this app for school-aged children having difficulty with visual scanning/tracking, reading, working memory, & copying skills.”—OT _______________________ This app contains no outside ads or in-app purchases, does not collect or transmit personal data, and links can be deactivated. Supporting evidence for the design of this app can be found at www.tactustherapy.com.

Screenshots

HemiStim3 screens
Visual Attention Therapy Lite4 screens

Verdict

The call

The clearest difference is price: Visual Attention Therapy Lite at Free against HemiStim's $9.99. Visual Attention Therapy Lite also leads on rating (4.7 vs 2.4) and review sentiment (75% vs 38%). HemiStim's advantage is chart position (#196 vs unranked). On update cadence, 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

Visual Attention 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

Visual Attention Therapy Lite holds the better App Store score, 4.7 against 2.4. That said, the two scores are not equally well evidenced: Visual Attention Therapy Lite has 705 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 75% of Visual Attention Therapy Lite's.

UpkeepUpdate frequency

HemiStim ships an update every 8 months, Visual Attention Therapy Lite every 9 months. The most recent releases landed on September 14, 2026 and September 21, 2026 respectively.

Scorecard7 real differences · 4 level
HemiStim versus Visual Attention Therapy Lite: the parameters behind the verdict, then further details
ParameterHemiStimVisual Attention Therapy Lite
Price$9.99Free — better
Rating2.4 (5 ratings)4.7 (705 ratings) — better
Positive reviews37.5% of reviews75.0% of reviews — better
Number of ratings5705 — better
Update frequencyEvery 8 months — betterEvery 9 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
Best chart rank#196 — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.09.0 — better
Further details — not scored
Size1 MB12 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%

Visual Attention Therapy Lite

All ratings705 ratings
Positive94.8%
Neutral3.5%
Negative1.7%
Written reviews16 reviews
Positive75.0%
Neutral0.0%
Negative25.0%

Bugs and requests

HemiStim

Not enough reviews yet to summarise bugs or requests.

Visual Attention Therapy Lite

Requested features

2 requests
  • Allow users to go to the next test without returning home
  • Larger font for geriatric patients

In-app purchases

None

HemiStim

No in-app purchases

None

Visual Attention Therapy Lite

No in-app purchases

Questions

Is HemiStim free?
HemiStim costs $9.99, with no in-app purchases.
Is Visual Attention Therapy Lite free?
Visual Attention Therapy Lite is free to download, with no in-app purchases.
Which has better reviews, HemiStim or Visual Attention Therapy Lite?
Visual Attention Therapy Lite is rated higher. HemiStim averages 2.4 out of 5 from 5 ratings, while Visual Attention Therapy Lite averages 4.7 from 705 ratings.
Do HemiStim or Visual Attention Therapy Lite have ads?
Neither HemiStim nor Visual Attention Therapy Lite shows ads.
Which is updated more often, HemiStim or Visual Attention Therapy Lite?
HemiStim ships an update every 8 months, and Visual Attention Therapy Lite every 9 months. Most recently, HemiStim was updated on September 14, 2026 and Visual Attention Therapy Lite on September 21, 2026.

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