# Visual Vertical vs HemiStim

The clearest difference is review sentiment: Visual Vertical at 100% against HemiStim's 38%. HemiStim's advantage is rating (2.4 vs 2.0) and update cadence (every 8 months vs every 38 months). On ratings volume, ads, in-app purchases and monetization model there is nothing between them.

Visual Vertical costs $11.99 and HemiStim $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

HemiStim holds the better App Store score, 2.4 against 2.0. Both are backed by a comparable volume of ratings — 5 and 5 respectively. Written reviews complicate that: 100% of Visual Vertical's written reviews are positive against 38% of HemiStim's, so the app with the better star average is not the one people write more warmly about.

Visual Vertical ships an update every 38 months, HemiStim every 8 months. The most recent releases landed on September 24, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | Visual Vertical | HemiStim |
| --- | --- | --- |
| Price | $11.99 | **$9.99** |
| Rating | [2.0 (5 ratings)](https://appshunter.io/ios/app/visual-vertical/id419017746/reviews) | **[2.4 (5 ratings)](https://appshunter.io/ios/app/hemistim/id521313664/reviews)** |
| Number of ratings | 5 | 5 |
| Positive reviews | **100.0% of reviews** | 37.5% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 38 months | **Every 8 months** |
| Monetization | Paid | Paid |
| Size | 10 MB | 1 MB |
| Requires iOS | 16.6 | **12.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 12+ | 4+ |
| Developer | [Clear Health Media](https://appshunter.io/developer/419017749) | [Linsay Associates, LLC](https://appshunter.io/developer/326305565) |

## What reviewers say

### Visual Vertical

[App page](https://appshunter.io/ios/app/visual-vertical/id419017746)

This medical app offers a quick, accurate, and low-cost method for measuring subjective visual vertical. It's designed for neurologists and vestibular rehabilitation specialists to test patients, especially for brainstem lesions and otolithic function, using just an iPhone or iPad.

**Highlights:** Measure subjective visual vertical, Accurate and low-cost testing, Suitable for neurology and vestibular rehab, Tests for brainstem lesions, Evaluates otolithic function, Multiple readings and averaged results, Single, one-off readings

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### HemiStim

[App page](https://appshunter.io/ios/app/hemistim/id521313664)

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:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Visual Vertical free?

Visual Vertical costs $11.99, with no in-app purchases.

### Is HemiStim free?

HemiStim costs $9.99, with no in-app purchases.

### Which has better reviews, Visual Vertical or HemiStim?

HemiStim is rated higher. Visual Vertical averages 2.0 out of 5 from 5 ratings, while HemiStim averages 2.4 from 5 ratings.

### Do Visual Vertical or HemiStim have ads?

Neither Visual Vertical nor HemiStim shows ads.

### Which is updated more often, Visual Vertical or HemiStim?

Visual Vertical ships an update every 38 months, and HemiStim every 8 months. Most recently, Visual Vertical was updated on September 24, 2026 and HemiStim on September 14, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*