# HemiStim > Visual brain stimulation app for targeted hemispheric connectivity exercises. (iPhone/iPad app by Linsay Associates, LLC.) - Source: https://appshunter.io/ios/app/hemistim/id521313664 (this page in markdown: same URL + `.md`) - Developer: [Linsay Associates, LLC](https://appshunter.io/developer/326305565) - Category: Medical, Health & Fitness - Price: $9.99 - Rating: 2.40/5 from 5 App Store ratings · 8 written reviews indexed - Age rating: 4+ - Requires: iOS 12.0 · 1 MB - Languages: American English - Released: 2012-04-28 - Data updated: 2026-09-02 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/hemistim/id521313664/reviews.md ## What is HemiStim? 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. ## Key features - 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 ## Recent user reviews (8 of 8) All indexed reviews: https://appshunter.io/ios/app/hemistim/id521313664/reviews.md ### 5/5 — Very useful *2025-08-21* Thanks for creating this app! ### 1/5 — Does not Open *2018-10-14* 10 Euro Fine. The App did not start. It just crashes again and again. ### 1/5 — Does NOT WORK! *2018-10-10* Just spent $12.99 on this as part of a bundle. The HemiStim app won’t even open! **Developer response:** It was a surprise to us too when HemiStim stopped working with iOS 12, but we’ve fixed it. Download the latest version and it will work again. Thank you for your patience. ### 1/5 — Stop working. *2018-10-10* Great app, but it stop working all the sudden and I don’t know who to contact to fix it. **Developer response:** It was a surprise to us too when HemiStim stopped working with iOS 12, but we’ve fixed it. Download the latest version and it will work again. Thank you for your patience. ### 1/5 — Stopped working in iOS12 *2018-10-01* I was using this app for therapy. It was working very well and I really enjoyed using it to help me with the vestibular issue I have. When my iPad updated with iOS 12 it stopped working completely. I can’t find any way to contact the company to see if there is a fix for this. **Developer response:** It was a surprise to us too when HemiStim stopped working with iOS 12, but we’ve fixed it. Download the latest version and it will work again. Thank you for your patience. ### 3/5 — OK, not brilliant *2012-08-12* Not as good as the PC version, which allows for opk stimulus, quadrant (upper and lower left and right) for more specific parietal vs temporal stimulation. The moving target is hard to set - too small to touch as accurately as I'd like all the time, and only goes left and right from the same staring point rather than moveable to anywhere like the PC version. I would tend to only use this in clinic briefly to provide a left or right hem stim to test a hypothesis of effect but I would stop short at getting patients to get this app and use it at home. A good first version but needs much more features and customisability to be as clinically relevant as the original PC version, which I can put on a USB already customized to a patient and give them to use at home without them having to pay 10 bucks for it. ### 5/5 — Fantastic brain tool. *2012-05-02* I've always been a big fan of the hemistim concept and taking it to tablets and phones is brilliant. Now I can have my patients download the app for little cost and have them take their therapy with them wherever they go. It would be good to add one sentence to the description about just rotating the display to change from vertical to horizontal saccades. Took me a few minutes to figure that one out. I hope we see diagonally moving targets in an update soon and the option for pure saccades w/o pursuits would be nice too. ### 5/5 — Really nice *2012-04-30* Excellent app for anyone who works in functional neurology. ## Frequently asked questions about HemiStim ### What is HemiStim used for? HemiStim is used for visual stimulation of specific brain lobes, including the frontal, parietal, occipital, and temporal lobes, to improve hemispheric connectivity. It can be part of home-based or office-based therapy programs. ### How does HemiStim work? HemiStim provides visual stimulation through color patterns and eye tracking exercises. It targets specific left or right visual exercises, stimulating the contralateral occipital lobe and engaging the ipsilateral parietal and frontal cortex for pursuit and saccadic eye movements. ### What are the controls for HemiStim? Users can swipe to select color patterns, tap to start blinking, and double-tap to stop. Blink rate and timer are adjustable with sliders. Target motion for saccades and pursuits is controlled by tapping a small target and dragging it. ### Does HemiStim track therapy sessions? Yes, HemiStim automatically tracks therapy sessions, recording all pertinent information. This data can be maintained for close communication between clinician and patient via email. ### What devices does HemiStim support? HemiStim is supported on iPhone, iPad, and iPod devices, indicating broad compatibility within the Apple ecosystem. ### How much does HemiStim cost? HemiStim is a paid application, priced at $9.99. There are no in-app purchases mentioned, suggesting a one-time purchase for the full functionality. ### What is the age rating for HemiStim? HemiStim has an age rating of 4+, making it suitable for a wide range of users, including children and adults. ### How often is HemiStim updated? The latest version of HemiStim, 1.4.4, was released on May 8, 2024, indicating recent development and support from the developer. ## Version history (last 5 releases) ### 1.4.4 — 2024-05-08 HemiStim has been updated to work with iOS 17 ### 1.4.3 — 2019-12-31 Updated for the new iPhones and iPads with larger screens. ### 1.4.2 — 2018-10-14 Fixed a bug due to iOS 12 that caused HemiStim to crash. ### 1.4.1 — 2017-08-17 minor bug fixes. ### 1.4 — 2017-08-17 Updated for the latest versions of iOS. ## Apps similar to HemiStim | App | Rating | Price | Category | | --- | --- | --- | --- | | [OKN Drum: Optokinetic](https://appshunter.io/ios/app/okn-drum-optokinetic/id6474153180) | 4.0 (14) | Free | Medical | | [Visual Attention Therapy](https://appshunter.io/ios/app/visual-attention-therapy/id539203206) | 4.7 (486) | $19.99 | Medical | | [Reflex - PLR Analyzer](https://appshunter.io/ios/app/reflex-plr-analyzer/id1412154869) | 3.5 (23) | Free | Medical | | [Language Therapy 4-in-1](https://appshunter.io/ios/app/language-therapy-4-in-1/id525278822) | 4.7 (1,909) | $89.99 | Medical | | [Visual Attention Therapy Lite](https://appshunter.io/ios/app/visual-attention-therapy-lite/id554546572) | 4.7 (705) | Free | Medical | | [Focus Builder Pro](https://appshunter.io/ios/app/focus-builder-pro/id6751810825) | 5.0 (1) | Free | Medical | ## More apps by Linsay Associates, LLC - [OptoDrum](https://appshunter.io/ios/app/optodrum/id374981098) - [EMDR Therapy](https://appshunter.io/ios/app/emdr-therapy/id477504212) - [OptoDrumVideo](https://appshunter.io/ios/app/optodrumvideo/id537711819) - [Gopher It](https://appshunter.io/ios/app/gopher-it/id904273294) - [InnerEye](https://appshunter.io/ios/app/innereye/id985248472) All apps by Linsay Associates, LLC: https://appshunter.io/developer/326305565 ## Related topics [hemistim](https://appshunter.io/ios/topics/hemistim) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-02.*