# HemiStim vs Focus Builder Pro

The clearest difference is price: Focus Builder Pro at Free against HemiStim's $9.99. Focus Builder Pro also leads on rating (5.0 vs 2.4) and update cadence (every 10 days vs every 8 months). HemiStim's advantage is review sentiment (38% vs 0%) and in-app purchases (none vs 3). On ratings volume, ads and device support there is nothing between them.

Focus Builder Pro is free to download; HemiStim costs $9.99 up front. Focus Builder Pro sells 3 in-app purchases, starting at $9.99 per month. HemiStim asks for nothing beyond the download.

Focus Builder Pro holds the better App Store score, 5.0 against 2.4. Both are backed by a comparable volume of ratings — 5 and 2 respectively. Written reviews complicate that: 38% of HemiStim's written reviews are positive against 0% of Focus Builder Pro'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, Focus Builder Pro every 10 days. The most recent releases landed on September 14, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | HemiStim | Focus Builder Pro |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | [2.4 (5 ratings)](https://appshunter.io/ios/app/hemistim/id521313664/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/focus-builder-pro/id6751810825/reviews)** |
| Number of ratings | **5** | 2 |
| Positive reviews | **37.5% of reviews** | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 10 days** |
| Monetization | Paid | **Freemium** |
| Best chart rank | **#196** | — |
| Size | 1 MB | 50 MB |
| Requires iOS | **12.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Linsay Associates, LLC](https://appshunter.io/developer/326305565) | [NeurdSolutions, LLC](https://appshunter.io/developer/950133465) |

## 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


### Focus Builder Pro

[App page](https://appshunter.io/ios/app/focus-builder-pro/id6751810825)

This app offers targeted eye movement exercises designed to enhance brain plasticity and neurotherapeutic outcomes. It provides customizable exercises and patient session building for practitioners, and permanent access to exercises for patients under guidance.

**Highlights:** Targeted eye movement exercises, Brain plasticity enhancement, Customizable exercise settings, Patient session builder, Progress monitoring, Neurotherapeutic outcomes

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Focus Builder Pro Practitioner | $9.99 | per month |
| Focus Builder Pro Practitioner | $69.99 | per year |
| Patient Purchase | $19.99 | one-time |


## Frequently asked questions

### Is HemiStim free?

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

### Is Focus Builder Pro free?

Focus Builder Pro is free to download, with in-app purchases available.

### Which has better reviews, HemiStim or Focus Builder Pro?

Focus Builder Pro is rated higher. HemiStim averages 2.4 out of 5 from 5 ratings, while Focus Builder Pro averages 5.0 from 2 ratings.

### Do HemiStim or Focus Builder Pro have ads?

Neither HemiStim nor Focus Builder Pro shows ads.

### Which is updated more often, HemiStim or Focus Builder Pro?

HemiStim ships an update every 8 months, and Focus Builder Pro every 10 days. Most recently, HemiStim was updated on September 14, 2026 and Focus Builder Pro on September 13, 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.*