Version history
NERV Disaster Prevention
30
ASO score
Text
25/100
Reviews
60/100
Graphic
28/100
Other
0/100
App Rating
4.5
Votes
395.34K
App Age
6y
Last Update
Aug 13, 2025
iAP
$1.99 - 3.99
Compare with Category Top Apps
|
Metrics
|
Current App
|
Category Top Average
|
Difference
|
|---|---|---|---|
|
Installs
|
1.8M
|
20.6M
|
-91%
|
|
Rating
|
4.48
|
4.5
|
-0.4%
|
|
Number of Ratings (Voted)
|
213.4K
|
39M
|
-99%
|
|
App Age
|
6y 0m
|
8y 3m
|
-27%
|
|
In-app Purchases Price
|
$3
|
$29
|
-90
%
|
|
Update Frequency
|
88d
|
159d
|
-45%
|
|
Title Length
|
24
|
26
|
-8%
|
|
Short Description Length
|
24
|
69
|
-65%
|
|
Description Length
|
3 982
|
2 774
|
+44%
|
|
Number of Screenshots
|
700
|
1263
|
-45
%
|
|
Has Video?
|
No
|
0% has videos
|
|
|
Size
|
0MB
|
0MB
|
|
Category Ranking in United States
7 days
Last 7 days
Last 30 days
Last 90 days
Last 180 days
Last year
| Top | Dec 18, 2025 | Dec 25, 2025 |
|---|---|---|
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No results were found!
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| Top | Dec 18, 2025 | Dec 25, 2025 |
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No results were found!
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| Top | Dec 18, 2025 | Dec 25, 2025 |
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No results were found!
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| Top | Dec 18, 2025 | Dec 25, 2025 |
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No results were found!
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Downloads
Downloads Graph
Total
1.7M
Last month
15K
Text ASO
Title
(
Characters:
24
of 50
)
NERV Disaster Prevention
Short Description
(
Characters:
24
of 80
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All you need, in one app
Description
(
Characters:
3982
of 4000
)
The NERV Disaster Prevention App is a smartphone service that delivers earthquake, tsunami, volcanic eruption and emergency warnings, as well as provides weather-related disaster prevention information for flooding and landslides, optimised based on the user's current and registered locations.
The app was developed to help people living in or visiting an area where damage is expected to occur, to accurately assess the situation and make quick decisions and actions.
With information received directly through a leased line connected to the Japan Meteorological Agency, our proprietary technology enables the fastest information distribution in Japan.
▼ All the information you need, in one app
Get a wide range of disaster prevention information, including weather and typhoon forecasts, rain radar, earthquake, tsunami and volcanic eruption alerts, emergency weather warnings and landslide information, river information, and heavy rain risk notifications.
By interacting with the map on the screen, you can zoom in on your location or pan across the country and see the cloud cover, typhoon forecast areas, tsunami warning areas, or the scale and intensity of an earthquake.
① Providing users with the most appropriate disaster information
The home screen displays the information you need at the time and place you need it. When there’s an earthquake, the home screen will show you the latest information. If another type of warning or alert is issued while the earthquake is active, the app will sort them depending on the type, elapsed time and urgency, so you’ll always have the most important information at your fingertips.
② Push Notifications for Important Information
We send out different types of notifications depending on the device’s location, the type of information and level of urgency. If the information is not urgent, we send a silent notification as not to disturb the user. For more urgent situations where a disaster is time-sensitive, a ‘Critical Alert’ alerts the user to an imminent danger. Notifications like Earthquake Early Warnings (Alert level) and Tsunami Warnings will be forced to sound, even if the device is in Silent or Do Not Disturb modes.
Note: Critical Alerts will only be sent to users in the target area of the most urgent types of disasters. Users who have registered their location but are not in the target area will instead receive a normal notification.
※ In order to receive Critical Alerts, you need to set your location permissions to “Always Allow” and have Background App Refresh turned on. If you don’t want Critical Alerts, you can disable them from Settings.
③ Barrier-Free Design
We paid close attention when designing the app to ensure our information is accessible to everyone. We put a focus on accessibility, with colour schemes that are easy to distinguish for people with colour blindness, and use a font with large, clear letters so long bodies of text are easy to read.
▼ Supporters’ Club (In-App Purchase)
In order to keep doing what we do, we’re looking for supporters to help us cover the development and operational costs of the app. The Supporters’ Club is a voluntary membership scheme for those who want to give back to the NERV Disaster Prevention app, by contributing to its development with a monthly fee.
You can find out more information about the Supporters’ Club on our website.
https://nerv.app/en/supporters.html
[Privacy]
Gehirn Inc. is an information security company. The security and privacy of our users is our highest priority. We take great care not to collect excessive amounts of information about our users through this application.
Your exact location is never known to us; all location information is first converted to an area code used by everyone in that area (like a zip code). The server also doesn’t store past area codes, so your movements cannot be tracked.
Learn more about your privacy on our website.
https://nerv.app/en/support.html#privacy}
Read more
Other
Additional Information
| Rating: | |
| Voted: | 395.34K |
| Google Play Link: | |
| Website: | |
| Email: | |
| Privacy Policy: | |
| Categories: | Weather |
| Size: | - |
| iAP: | 1.99 - 3.99 $ |
| Installs: | 1.75M |
| App Age: | 6 years |
| Release Date: | Dec 18, 2019 |
| Last Update: | Aug 13, 2025 |
| Version: | 6.2.0 |
Version history
6.2.0
Aug 13, 2025
This update improves the handling of network communication errors and network communication processing.<br><br>We'd like to extend our heartfelt sympathies to those affected by the recent tsunami and heavy rain disasters, and pray for the earliest possible recovery and restoration.<br><br>We deeply appreciate all the supporters who continue to support the NERV Disaster Prevention App on a daily basis.
6.1.2
Jul 23, 2025
This update features minor changes to the handling of earthquake and tsunami information, based on specification changes provided by the Japan Meteorological Agency.<br><br>Our company, Gehirn Inc., recently celebrated its 15th anniversary on July 6th. However, as frequent earthquakes were occurring near the Tokara Islands that day, we decided not to promote this milestone at the time. We hope that the people of Toshima Village will be able to return to their normal lives soon.