Replace your bulky optokinetic drum with OKNDrum.

OKNDrum is the easy-to-use alternative to a physical optokinetic drum. Our app is used to evaluate neurological, otological, and ophthalmological disorders.

To use OKNDrum simply place the iPhone or iPad in front of the eyes to elicit the response. The stripe color, width, speed, and direction can be adjusted easily.

OKNDrum features:
- 7 Scrolling Speeds
- Red or Black Stripe Colors
- Adjustable Scroll Direction
- Adjustable Stripe Size
- Easy-to-hide Menu
- Easy-to-follow Instructions

Feel free to contact us with any questions or feedback.

*** OKNDrum was developed with the help of medical professionals and with the help of research papers.

*** OKNDrum IS NOT a substitute for medical support. Consult your doctor for any advice.

What’s New

Version 1.6

Thank you for downloading OKNDrum. In this update:
- Fixed Bugs
- Performance Improvements

Ratings and Reviews

3.3 out of 5
4 Ratings

4 Ratings

Brain-bug ,

Horizontal Rotation

I was looking for an Opto Drum that moves horizontally, could there be a fix to have this occur, or a refund if not?

Developer Response ,

Hi! Thanks for writing your concerns. You can achieve this if you lock your screen rotation and rotate your phone horizontally. The lines should move horizontally then. Will as this as a feature though. Have a good day.

App Privacy

The developer, Angel Vazquez, has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer's privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

    Up to six family members will be able to use this app with Family Sharing enabled.

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