Version history
OKN Viewer: Nystagmus
52
ASO score
Text
54/100
Reviews
50/100
Graphic
60/100
Other
0/100
App Rating
5
Votes
4
App Age
1 year 4m
Last Update
Dec 04, 2025
Compare with Category Top Apps
|
Metrics
|
Current App
|
Category Top Average
|
Difference
|
|---|---|---|---|
|
Rating
|
5
|
4.6
|
+9%
|
|
Number of Ratings (Voted)
|
4
|
65.7K
|
-100%
|
|
App Age
|
1y 3m
|
9y 3m
|
-86%
|
|
In-app Purchases Price
|
$0
|
$35
|
|
|
Update Frequency
|
30d
|
102d
|
-71%
|
|
Title Length
|
21
|
25
|
-16%
|
|
Subtitle Length
|
29
|
27
|
+7%
|
|
Description Length
|
1 883
|
2 720
|
-31%
|
|
Number of Screenshots
|
351
|
1400
|
-75
%
|
|
Size
|
1MB
|
280MB
|
-100
%
|
Category Ranking in United States
7 days
Last 7 days
Last 30 days
Last 90 days
Last 180 days
Last year
| Top | Dec 27, 2025 | Jan 03, 2026 |
|---|---|---|
|
No results were found!
|
||
| Top | Dec 27, 2025 | Jan 03, 2026 |
|---|---|---|
|
No results were found!
|
||
| Top | Dec 27, 2025 | Jan 03, 2026 |
|---|---|---|
|
No results were found!
|
||
| Top | Dec 27, 2025 | Jan 03, 2026 |
|---|---|---|
|
No results were found!
|
||
Ranking Keywords in United States
| Keywords | App Rank |
|---|
Analyze this and other apps using Asolytics tools
Text ASO
Title
(
Characters:
21
of 30
)
OKN Viewer: Nystagmus
Subtitle
(
Characters:
29
of 30
)
Observe Optokinetic Nystagmus
Description
(
Characters:
1883
of 4000
)
Even in healthy people, nystagmus naturally occurs when watching moving scenery.
This app reproduces that nystagmus on your smartphone screen and lets you record your eye movements with the front-facing camera — a simple tool to observe and experience nystagmus.
By staring at the moving stripe pattern (bands) on the screen, you can easily observe optokinetic nystagmus (OKN).
It can be used as a preview/review tool in medical, rehabilitation, and educational settings, and also answers the simple question:
“What does nystagmus actually look like?”
【Main Features】
• Adjustable stripe width
Change the width of the moving stripes intuitively with a slider.
• Adjustable moving speed
Freely set how fast the stripes move, from very slow to fast.
• Customizable stripe color
Choose colors that suit your preference and visibility to enhance the visual effect.
• Record eye movements with the front camera
Keep your gaze fixed on the screen and record your eye movements, then review them later.
【Recommended For】
• Those who want to deepen their understanding of nystagmus and optokinetic nystagmus (OKN):
physicians, medical students, orthoptists, nurses, rehabilitation staff, and clinical laboratory technologists.
• Teachers and instructors looking for an easy-to-use visual teaching material for classes, practical training, or lectures.
• Science- and medicine-oriented students, as well as general users who are interested in visual effects and how the body reacts to them.
• No advertisements
Important Notice
This app is designed as a tool for observing, learning about, and experiencing nystagmus and optokinetic nystagmus.
It is not a medical device and is not intended for diagnosis or treatment.
If you have any symptoms or concerns and need evaluation, diagnosis, or treatment, please consult a physician or other qualified healthcare professional.}
Read more
Other
Additional Information
Version history
1.3
Dec 04, 2025
【Revision】
・Design revisions
1.2
Sep 25, 2024
[New feature]
Recording function: it is now possible to record and observe one's own nystagmus.