# HemiStim vs Reflex

The clearest difference is price: Reflex at Free against HemiStim's $9.99. Reflex also leads on rating (3.5 vs 2.4) and update cadence (every 2 weeks vs every 8 months). HemiStim's advantage is review sentiment (38% vs 0%) and in-app purchases (none vs 5). On ads there is nothing between them.

Reflex is free to download; HemiStim costs $9.99 up front. Reflex sells 5 in-app purchases, starting at $1.99 per month. HemiStim asks for nothing beyond the download.

Reflex holds the better App Store score, 3.5 against 2.4. Both are backed by a comparable volume of ratings — 5 and 23 respectively. Written reviews complicate that: 38% of HemiStim's written reviews are positive against 0% of Reflex's, so the app with the better star average is not the one people write more warmly about.

HemiStim ships an update every 8 months, Reflex every 2 weeks. The most recent releases landed on September 14, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | HemiStim | Reflex |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | [2.4 (5 ratings)](https://appshunter.io/ios/app/hemistim/id521313664/reviews) | **[3.5 (23 ratings)](https://appshunter.io/ios/app/reflex-plr-analyzer/id1412154869/reviews)** |
| Number of ratings | 5 | **23** |
| Positive reviews | **37.5% of reviews** | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 2 weeks** |
| Monetization | **Paid** | Subscription |
| Best chart rank | **#196** | — |
| Size | 1 MB | 22 MB |
| Requires iOS | **12.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | +17 |
| Developer | [Linsay Associates, LLC](https://appshunter.io/developer/326305565) | [Brightlamp, Inc.](https://appshunter.io/developer/1380261827) |

## What reviewers say

### HemiStim

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

**Currently charting:** #196 Top Paid · Medical (US App Store)

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


### Reflex

[App page](https://appshunter.io/ios/app/reflex-plr-analyzer/id1412154869)

This tool measures and tracks pupillary activity using an iPhone camera for quick, 5-second tests. It helps medical professionals monitor patient progress and identify deviations for clinical decision support.

**Highlights:** Pupillary readings via iPhone camera, 5-second test duration, Patient progress tracking, Baseline feature for deviations, Clinical decision support tool, Rapid biomarker validation

**Features:** Vision Pro support

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Critical Care Monthly | $1.99 | per month |
| Monthly Subscription | $41.99 | per month |
| Monthly Subscription | $41.99 | per month |
| Yearly Subscription | $419.99 | per year |
| Yearly Subscription | $419.99 | per year |


## Frequently asked questions

### Is HemiStim free?

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

### Is Reflex free?

Reflex is free to download, with in-app purchases available.

### Which has better reviews, HemiStim or Reflex?

Reflex is rated higher. HemiStim averages 2.4 out of 5 from 5 ratings, while Reflex averages 3.5 from 23 ratings.

### Do HemiStim or Reflex have ads?

Neither HemiStim nor Reflex shows ads.

### Which is updated more often, HemiStim or Reflex?

HemiStim ships an update every 8 months, and Reflex every 2 weeks. Most recently, HemiStim was updated on September 14, 2026 and Reflex on September 10, 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.*