OKNDrum Downloads & RevenueOKNDrum: Optokinetic Drum · App Store
OKNDrum: Optokinetic Drum is #35 in Medical Paid in Germany and charting in 6 of 30 countries we track.
Updated 11 Nov 2026 · rankings refresh through the day
25 Sep 2026OKNDrum: Optokinetic Drum update history & changes
Last change · 22 events since 26 Oct 2018Full timeline ↓Full timeline · 21 events in the last 12 months
- 📈OKNDrum: Optokinetic Drum new best rank in the overall chart: #135Top Paid · All Apps · KR
- 📈OKNDrum: Optokinetic Drum entered the top 100Top Paid · Medical · GB
- 📈OKNDrum: Optokinetic Drum charting in a new country in 2 chartsUnited Kingdom · Taiwan
- 📈OKNDrum: Optokinetic Drum entered the top 10Top Paid · Medical · CN
- 📈OKNDrum: Optokinetic Drum entered the top 100Top Paid · Medical · DE
- 📈OKNDrum: Optokinetic Drum entered the top 100Top Paid · Medical · CN
- 📈OKNDrum: Optokinetic Drum entered the top 100Top Grossing · Medical · KR
- 📈OKNDrum: Optokinetic Drum hit #1Top Paid · Medical · KR
- 📈OKNDrum: Optokinetic Drum entered the top 100Top Paid · Medical · CA
- 📈OKNDrum: Optokinetic Drum charting in a new countryCanada
- 📈OKNDrum: Optokinetic Drum entered the top 100Top Paid · Medical · US
- 📈OKNDrum: Optokinetic Drum charting in a new country in 4 chartsGermany · India · Italy · United States
- 🆕OKNDrum: Optokinetic Drum first spotted by AppInsider#58 in Top Paid · Medical · South Korea
- 🆕OKNDrum: Optokinetic Drum: its developer released another app: SoundSleep – Snoring Sounds
- 🆕OKNDrum: Optokinetic Drum released on the App Store
Collected from the stores by AppInsider since we first spotted the app. Dates are when we saw each change.
Medical PaidOKNDrum: Optokinetic Drum at a glance
AI summary written from our chart and store data, 2026-11-09. It can be wrong: check the numbers above.
A digital optokinetic drum simulator for iPhone and iPad that allows medical professionals to evaluate neurological, otological, and ophthalmological disorders by adjusting stripe parameters. The app holds strong positions in the South Korean Medical Paid charts (#6) and Grossing rankings (#50), while also maintaining visibility in Russian, Saudi Arabian, and several other international medical categories.
Similar apps: iOpto, VNG Test, EyeTrack
OKNDrum: Optokinetic Drum on the App Store
App details
App privacy Measured
OKNDrum: Optokinetic Drum’s App Store privacy label declares 0 data categories used to track you across other companies’ apps and websites, 0 linked to your identity and 0 collected anonymously.
As declared by the developer on the App Store — Apple requires every app to publish this label. We track changes over time.
OKNDrum: Optokinetic Drum downloads
Worldwide, per day, and installs to date. The band is open; the exact number is free with an account.
How this is calculated
Active users
All platforms, worldwide. Free with an account.
How this is calculated
Where it ranks now
Every top chart it appears in across 30 countries.
| Country | Charts | Rank |
|---|---|---|
| Germany | MedicalPaid | #35 |
| South Korea | MedicalGrossing | #68 |
| South Korea | MedicalPaid | #45 |
 Japan | MedicalPaid | #134 |
 Russia | MedicalPaid | #60 |
 Saudi Arabia | MedicalPaid | #73 |
 Italy | MedicalPaid | #190 |
Apps near OKNDrum: Optokinetic Drum on the chart
Medical Paid, around #35.
Ratings
App Store, worldwide.
Review momentum
ⓘ How we measure thisReview momentum (0-100) blends how fast the app collects ratings compared with other apps in its category (60%), whether that pace is speeding up (25%) and what recent raters give it (15%; recent stars well below lifetime pull it down). Ratings counts are read daily. A jump usually means a launch, a feature, ads or a new review prompt.
What users say about OKNDrum: Optokinetic Drum
From recent reviews.
About OKNDrum: Optokinetic Drum
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.
Latest updates
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