# OKN Strips vs HemiStim

The clearest difference is rating: OKN Strips at 4.6 against HemiStim's 2.4. OKN Strips also leads on price ($3.99 vs $9.99) and ratings volume (586 vs 5). On ads, in-app purchases, monetization model and device support there is nothing between them.

OKN Strips costs $3.99 and HemiStim $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

OKN Strips holds the better App Store score, 4.6 against 2.4. That said, the two scores are not equally well evidenced: OKN Strips has 586 ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 62% of OKN Strips's written reviews are positive against 38% of HemiStim's.

OKN Strips ships an update every 3 months, HemiStim every 8 months. The most recent releases landed on October 23, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | OKN Strips | HemiStim |
| --- | --- | --- |
| Price | **$3.99** | $9.99 |
| Rating | **[4.6 (586 ratings)](https://appshunter.io/ios/app/okn-strips/id496001751/reviews)** | [2.4 (5 ratings)](https://appshunter.io/ios/app/hemistim/id521313664/reviews) |
| Number of ratings | **586** | 5 |
| Positive reviews | **61.5% of reviews** | 37.5% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 8 months |
| Monetization | Paid | Paid |
| Best chart rank | **#29** | — |
| Size | 7 MB | 1 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Thomas Alvarez](https://appshunter.io/developer/496001754) | [Linsay Associates, LLC](https://appshunter.io/developer/326305565) |

## What reviewers say

### OKN Strips

[App page](https://appshunter.io/ios/app/okn-strips/id496001751)

**Currently charting:** #29 Top Paid · Medical (US App Store)

This diagnostic and therapeutic app aids in evaluating neurological, otological, and ophthalmological disorders. It features moving strips to elicit nystagmus, a red desaturation test, and an Amsler grid for comprehensive eye examinations.

**Highlights:** Optokinetic Nystagmus (OKN) elicitation, Red Desaturation test, Amsler Grid for eye testing, Adjustable strip speed, color, and width, Reverse strip direction, Toolbar hide/show functionality

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

**In-app purchases:** none

**What reviewers like**

- 👍 Helpful for eye therapy
- 👍 Reduces eye strain and dizziness
- 👍 Effective for nerve/muscle paralysis
- 👍 Great for babies' OKN assessment
- 👍 Good for Amsler grid use

**What reviewers complain about**

- 😞 No way to adjust speed/style
- 😞 Cannot customize direction
- 😞 Lacks options for smooth pursuit/saccades
- 😞 Expensive for basic functionality
- 😞 Difficult to uninstall

**Reported bugs**

- Red desaturation test color doesn't change
- Red-Black inversion doesn't work on grid test
- Cannot go back to menu from OKN strips without restarting app

**Requested features**

- Recording feature
- Adjustable speed and style
- Change direction of movement (left/right, up/down)
- Options for smooth pursuit, saccades, VOR
- Horizontal stripes option


### 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 OKN Strips free?

OKN Strips costs $3.99, with no in-app purchases.

### Is HemiStim free?

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

### Which has better reviews, OKN Strips or HemiStim?

OKN Strips is rated higher. OKN Strips averages 4.6 out of 5 from 586 ratings, while HemiStim averages 2.4 from 5 ratings.

### Do OKN Strips or HemiStim have ads?

Neither OKN Strips nor HemiStim shows ads.

### Which is updated more often, OKN Strips or HemiStim?

OKN Strips ships an update every 3 months, and HemiStim every 8 months. Most recently, OKN Strips was updated on October 23, 2026 and HemiStim on October 19, 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.*