# OKN Strips vs MDS Events

OKN Strips and MDS Events both sit at 4.6 stars, but that hides the real split: 62% of OKN Strips's written reviews are positive against 0% of MDS Events's. OKN Strips also leads on update cadence (every 3 months vs every 12 months) and chart position (#102 vs unranked). MDS Events's advantage is price (Free vs $3.99). On rating, ads, in-app purchases and device support there is nothing between them.

MDS Events is free to download; OKN Strips costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 4.6 for OKN Strips against 4.5 for MDS Events. That said, the two scores are not equally well evidenced: OKN Strips has 587 ratings behind it against 104, so its average is the more settled of the two. Written reviews are what separate them: 62% of OKN Strips's written reviews are positive against 0% of MDS Events's.

OKN Strips ships an update every 3 months, MDS Events every 12 months. The most recent releases landed on October 30, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | OKN Strips | MDS Events |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | **[4.6 (587 ratings)](https://appshunter.io/ios/app/okn-strips/id496001751/reviews)** | [4.5 (104 ratings)](https://appshunter.io/ios/app/mds-events/id1434098838/reviews) |
| Number of ratings | **587** | 104 |
| Positive reviews | **61.5% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 12 months |
| Monetization | Paid | **Free** |
| Best chart rank | **#102** | — |
| Size | 7 MB | 109 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [Thomas Alvarez](https://appshunter.io/developer/496001754) | [Movement Disorder Society](https://appshunter.io/developer/533955667) |

## What reviewers say

### OKN Strips

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

**Currently charting:** #102 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


### MDS Events

[App page](https://appshunter.io/ios/app/mds-events/id1434098838)

Access comprehensive information for medical congresses, including sessions, speaker details, and exhibitor listings. Stay updated on the International Congress of Parkinson’s Disease and Movement Disorders® and other regional events.

**Highlights:** Event session access, Speaker information, Exhibitor listings, Regional event updates, Congress networking

**Features:** Apple Wallet

**In-app purchases:** none


## Frequently asked questions

### Is OKN Strips free?

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

### Is MDS Events free?

MDS Events is free to download, with no in-app purchases.

### Which has better reviews, OKN Strips or MDS Events?

OKN Strips is rated higher. OKN Strips averages 4.6 out of 5 from 587 ratings, while MDS Events averages 4.5 from 104 ratings.

### Do OKN Strips or MDS Events have ads?

Neither OKN Strips nor MDS Events shows ads.

### Which is updated more often, OKN Strips or MDS Events?

OKN Strips ships an update every 3 months, and MDS Events every 12 months. Most recently, OKN Strips was updated on October 30, 2026 and MDS Events on October 24, 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.*