Comparison

OKN Strips vs Focus Builder Pro

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

OKN Strips

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
Currently charting
Read full description

Top selling diagnostic and therapeutic app for iPad, iPhone and iPod Touch! OKN Strips can be used to elicit Optokinetic Nystagmus (OKN) for evaluation of neurological, otological or opthalmological disorders, includes a Red Desaturation mode and now has an Amsler grid for additional eye testing. OKN Strips: Tap the screen to cycle through speeds of the moving strips. Tap the strips icon in the bottom toolbar to toggle the color of the strips between Red and Black. Pinch or Zoom with two fingers to change the width of the strips. Swipe against the direction the strips are moving to reverse their direction. Tap the screen with two fingers to hide or show the bottom toolbar. On the right side of the bottom toolbar there's icons to open the Red Desaturation and Amsler Grid. Red Desaturation: Use the colored circle to perform a red desaturation test. Amsler Grid: Use the Amsler grid to perform eye tests. The buttons on the bottom toolbar change color combinations of the grid.

About

Focus Builder Pro

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
Currently charting
Read full description

Focus Builder: Targeted Eye Movement Exercises for Functional Neurologists and Patients Focus Builder is an iPad-optimized app delivering evidence-based eye movement exercises to promote brain plasticity and neurotherapeutic outcomes. Access requires creating an account and selecting your role: Subscription & Access Details Focus Builder requires role selection upon signup: Practitioner (Functional Neurologist) or Patient. This choice is permanent. - For Practitioners: Auto-Renewing Subscription Unlocking: - Access to 12 exercises with lots of customizable settings. Create new exercises based on the settings + sequences of exercises. - Patient session builder: Create and assign personalized exercise sequences for your patients, including progress monitoring and adjustment based on outcomes. Subscriptions auto-renew via Apple and can be managed in your App Store account. No free trial, but full access starts immediately upon purchase. Cancel anytime. - For Patients: One-Time In-App Purchase Permanent access to all exercises under your practitioner's guidance. No ongoing fees—includes any sequences assigned by your doctor for personalized therapy or usage of the exercises. Payment details are shown in your user profile after login. Role selection is permanent and cannot be changed later. No free trial or limited access—full functionality begins after purchase. Eye movements are a very powerful way to exercise the brain and to create long-term change in the brain, known as plasticity. The “Focus Builder” app contains a variety of exercises which challenge users to voluntarily move their eyes in various patterns, speeds and directions, which have been proven to activate specific parts of the brain depending on which eye movement is performed. This app is specifically designed for doctors that specialize in Functional Neurology and their patients. There is currently no app available that can provide these specific exercises. For best results, patients should consult a Functional Neurologist to determine how to use this app according to their needs and obtain the most therapeutic value. There are 3 types of eye movements that can have profound therapeutic benefits and all three are available in this app. 1.Pursuits (slow eye movements): Smooth pursuit eye movements allow the eyes to closely follow a moving object. Most people are unable to initiate pursuit without a moving visual signal. The pursuit of targets moving with velocities of greater than 30°/s tend to require catch-up saccades. 2.Saccades (fast eye movements): Saccades are quick, simultaneous movements of both eyes in the same direction. Initiated cortically by the frontal eye fields (FEF), or subcortically by the superior colliculus, saccades serve as a mechanism for fixation, rapid eye movement, and the fast phase of optokinetic nystagmus. 3.Anti-saccades (look away): The anti-saccade task has emerged as an important task for investigating the flexible control that we have over behavior. In this task, participants must suppress the reflexive urge to look at a visual target that appears suddenly in the peripheral visual field and must instead look away from the target in the opposite direction. A crucial step involved in performing this task is the top-down inhibition of a reflexive, automatic saccade. Patients diagnosed with various neurological and/or psychiatric disorders that affect the frontal lobes or basal ganglia find it difficult to suppress the automatic pro-saccade, revealing a deficit in top-down inhibition. The areas of the brain that are activated by these eye movements are too numerous to list, but to name a few, I have listed some of the functions that can improve with these eye exercises. 1.Executive function/behavior 2.Attention 3.Concentration 4.Impulse control 5.Social behavior 6.Motivation 7.Goal directed behavior Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

OKN Strips3 screens
Focus Builder Pro4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard8 real differences · 3 level
OKN Strips versus Focus Builder Pro: the parameters behind the verdict, then further details
ParameterOKN StripsFocus Builder Pro
Price$3.99Free — better
Rating4.6 (579 ratings)5.0 (2 ratings) — better
Positive reviews61.5% of reviews — better0.0% of reviews
Number of ratings579 — better2
Update frequencyEvery 3 monthsEvery 2 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFreemium — better
Best chart rank#101 — better#187
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.0 — better15.1
Further details — not scored
Size7 MB50 MB
Age rating4+17+
DeveloperThomas AlvarezNeurdSolutions, LLC

Customer experience

OKN Strips

All ratings579 ratings
Positive90.7%
Neutral3.8%
Negative5.5%
Written reviews26 reviews
Positive61.5%
Neutral7.7%
Negative30.8%

Focus Builder Pro

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Bugs and requests

OKN Strips

Reported bugs

3 issues
  • 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

8 requests
  • Recording feature
  • Adjustable speed and style
  • Change direction of movement (left/right, up/down)
  • Options for smooth pursuit, saccades, VOR
  • Horizontal stripes option
Show 3 more
  • More peer-reviewed studies
  • Make technology better known
  • Slower speed option

Focus Builder Pro

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

OKN Strips

No in-app purchases

3 purchases

Focus Builder Pro

Subscriptions2
  • Focus Builder Pro Practitioner$9.991 Month
  • Focus Builder Pro Practitioner$69.991 Year
One-time1
  • Patient Purchase$19.99

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 #101 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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