# OKN Strips vs Focus Builder Pro

The clearest difference is review sentiment: OKN Strips at 62% against Focus Builder Pro's 0%. OKN Strips also leads on in-app purchases (none vs 3) and ratings volume (579 vs 2). Focus Builder Pro's advantage is price (Free vs $3.99) and update cadence (every 2 weeks vs every 3 months). On ads, chart position and device support there is nothing between them.

Focus Builder Pro is free to download; OKN Strips costs $3.99 up front. Focus Builder Pro sells 3 in-app purchases, starting at $9.99 per month. OKN Strips asks for nothing beyond the download.

Focus Builder Pro holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: OKN Strips has 579 ratings behind it against 2, so its average is the more settled of the two. Written reviews complicate that: 62% of OKN Strips'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.

OKN Strips ships an update every 3 months, Focus Builder Pro every 2 weeks. The most recent releases landed on October 19, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | OKN Strips | Focus Builder Pro |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | [4.6 (579 ratings)](https://appshunter.io/ios/app/okn-strips/id496001751/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/focus-builder-pro/id6751810825/reviews)** |
| Number of ratings | **579** | 2 |
| Positive reviews | **61.5% of reviews** | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 weeks** |
| Monetization | Paid | **Freemium** |
| Best chart rank | **#117** | #187 |
| Size | 7 MB | 50 MB |
| Requires iOS | **12.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Thomas Alvarez](https://appshunter.io/developer/496001754) | [NeurdSolutions, LLC](https://appshunter.io/developer/950133465) |

## What reviewers say

### OKN Strips

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

**Currently charting:** #117 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


### Focus Builder Pro

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

**Currently charting:** #187 Top Grossing · Medical (US App Store)

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 OKN Strips free?

OKN Strips costs $3.99, 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, OKN Strips or Focus Builder Pro?

Focus Builder Pro is rated higher. OKN Strips averages 4.6 out of 5 from 579 ratings, while Focus Builder Pro averages 5.0 from 2 ratings.

### Do OKN Strips or Focus Builder Pro have ads?

Neither OKN Strips nor Focus Builder Pro shows ads.

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

OKN Strips ships an update every 3 months, and Focus Builder Pro every 2 weeks. Most recently, OKN Strips was updated on October 19, 2026 and Focus Builder Pro on October 1, 2026.

### Which is more popular, OKN Strips or Focus Builder Pro?

OKN Strips currently peaks at #117 in the App Store charts, and Focus Builder Pro at #187. Chart position reflects recent download velocity rather than total install base.

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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.*