# HemiStim vs Feather squadron 2

The clearest difference is price: Feather squadron 2 at Free against HemiStim's $9.99. Feather squadron 2 also leads on update cadence (every 5 days vs every 8 months). HemiStim's advantage is chart position (#200 vs unranked) and iOS requirement (12.0 vs 17.6). On ads, in-app purchases and device support there is nothing between them.

Feather squadron 2 is free to download; HemiStim costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

HemiStim ships an update every 8 months, Feather squadron 2 every 5 days. The most recent releases landed on October 2, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | HemiStim | Feather squadron 2 |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | **[2.4 (5 ratings)](https://appshunter.io/ios/app/hemistim/id521313664/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 37.5% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 5 days** |
| Monetization | Paid | — |
| Best chart rank | **#200** | — |
| Size | 1 MB | 18 MB |
| Requires iOS | **12.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Linsay Associates, LLC](https://appshunter.io/developer/326305565) | [Acoustic Pioneer](https://appshunter.io/developer/619517178) |

## What reviewers say

### HemiStim

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

**Currently charting:** #200 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


### Feather squadron 2

[App page](https://appshunter.io/ios/app/feather-squadron-2/id6670747895)

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

**In-app purchases:** none


## Frequently asked questions

### Is HemiStim free?

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

### Is Feather squadron 2 free?

Feather squadron 2 is free to download, with no in-app purchases.

### Do HemiStim or Feather squadron 2 have ads?

Neither HemiStim nor Feather squadron 2 shows ads.

### Which is updated more often, HemiStim or Feather squadron 2?

HemiStim ships an update every 8 months, and Feather squadron 2 every 5 days. Most recently, HemiStim was updated on October 2, 2026 and Feather squadron 2 on October 3, 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.*