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NERV Disaster Prevention icon
GOOGLE PLAY

NERV Disaster Prevention

Gehirn Inc. · Weather · Japan store
#7 GROSSING · WEATHER
View on Google Play ↗ App Store version →
Revenue a month, worldwide EST
$49.4K
Likely $16.5K to $148.3K
▼ 17.8% in 27 days
New ratings
Tracking
Daily counts start building from today
Rating
4.6 of 5
5.7K ratings in this store
Countries it ranks in
41
was 41 on Oct 14, 2026

Revenue

Estimated from the grossing charts of Oct 21, 2026 in the 53 countries we track, and ratings growth on the App Store.

EST. REVENUE / MONTH · WORLDWIDE · GOOGLE PLAY
$49.4K
Range $16.5K to $148.3K
EST. REVENUE / YEAR · WORLDWIDE
$593.3K
Not ranked on App Store in tracked countries
LIFETIME INSTALLS (GOOGLE)
2.3M
About 27.4K per month on average since launch
WHERE IT EARNS · EST. / MONTH
  • Japan #7 Weather$48.2K · 98%
  • Ukraine #35 Weather$1.1K · 2%
  • Greece #39 Weather$75 · 0%
HOW SURE ARE WE
Small app: combines its grossing ranks with ratings growth (107 new ratings a month on average since launch). Tested on 418 apps with verified revenue: typically off by about 2.4 times, so the range is wide. Countries we don't track (and Google Play in China, which doesn't exist) aren't included, and neither are ads or web payments. Gross revenue before store fees.
RATINGS
5.7K
AVG RATING
4.57
PRICE
Free
IN APP PURCHASES
¥250 - ¥480 per item
CONTAINS ADS
No
LAST UPDATE
36d ago
RELEASED
Dec 17, 2019
CONTENT RATING
Rated for 3+

Last 28 days

From our daily snapshots of every grossing chart.

DAYS IN A GROSSING CHART
28 / 28
COUNTRIES NOW
41 (was 10)
EST. REVENUE A MONTH, DAILY · BOTH STORES EST
Show daily values
Sep 24, 2026$1M a month
Sep 25, 2026$1.1M a month
Sep 26, 2026$1.1M a month
Sep 27, 2026$1.1M a month
Sep 28, 2026$875K a month
Sep 29, 2026$1.1M a month
Sep 30, 2026$1.3M a month
Oct 1, 2026$1.3M a month
Oct 2, 2026$1.3M a month
Oct 3, 2026$2.2M a month
Oct 4, 2026$2.3M a month
Oct 5, 2026$2.1M a month
Oct 6, 2026$2M a month
Oct 7, 2026$2M a month
Oct 8, 2026$2.3M a month
Oct 9, 2026$2.2M a month
Oct 10, 2026$1.9M a month
Oct 11, 2026$1.1M a month
Oct 12, 2026$998.1K a month
Oct 13, 2026$952K a month
Oct 14, 2026$910.5K a month
Oct 15, 2026$793.2K a month
Oct 16, 2026$721.9K a month
Oct 17, 2026$724.9K a month
Oct 18, 2026$724.1K a month
Oct 19, 2026$722.2K a month
Oct 20, 2026$857.4K a month
Oct 21, 2026$840.7K a month
The same estimate as the headline, saved every day. Best rank Sep 24, 2026: #6 Weather · JP. Now: #7 Weather · JP.

Money and momentum

Measured from the store, not estimated.

WHAT IT CHARGES
¥250 - ¥480 per item
Google Play only shows the price range per item.
REVIEW MOMENTUM
0.3 reviews / week
  • Trendrising
  • Recent reviews average3.9 stars
  • Recent 1 and 2 star share21%
From the latest 90 written reviews, covering 2498 days.
RATING BREAKDOWN
5.7K ratings
5★77%
4★11%
3★7%
2★3%
1★3%

What users say

Latest reviews, Japan Google Play.

★★★★★Oct 17, 2026

UIがとても重く、地震が起きた直後はアプリを開けても情報が何分も反映されなかったり、いらない情報が載ったり。本当に大きな地震が起きた時、電波も混雑されるの予想されるし、アプリ更新されにくくなるの目に見えている。今一人気の理由が分かりません。

★★★★★Oct 14, 2026

Only supports locations in Japan, but I am in Japan and it shows the location as being in Japan. But I cannot use the app

★★★★★Oct 14, 2026

This is one of my most important apps; it provides excellent and accurate weather forecasting, timely safety information and warnings and potentially life-saving emergency alerts - for a Japanese App for Japan it's use of English is also first-class! :) <3 Only occasional update missteps ever cause a problem. Thank you.

★★★★★Sep 21, 2026

good

★★★★★Jul 19, 2026

there was an earthquake but no information

★★★★★Jul 10, 2026

More cautious way to prevent a disaster from happening.

Apps like this

Same category, earning about as much.

Store screenshots

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App Store ads

Apple Search Ads this app ran in the last 90 days, from Apple's public ad repository.

No App Store ads in the EU
None in the last 90 days.

Apple only publishes ads shown in the EU (EU Digital Services Act), with a 7 day delay. An app that advertises only outside the EU shows nothing here. Shown for the App Store version (NERV Disaster Prevention).

Growth research

Where this app is buying and earning its users. Each link opens pre filtered.

ASO keywords

Most repeated terms in the listing. Highlighted ones also appear in the title or short description.

information19disaster prevention6disaster6earthquake6area6location6alerts5users5supporters5critical alerts5supporters club5nerv4prevention4tsunami4warnings4need4notifications4critical4nerv disaster3earthquake tsunami3tsunami volcanic3volcanic eruption3prevention information3information need3

What's new in 7.1.0

- Weather Flash Reports and Weather Information now display a map tailored to the type of information being reported - Weather Flash Reports and Weather Information can now be delivered as push notifications - The “Synoptic Chart” layer that was previously offered through Early Access is now available to everyone Our thoughts are with everyone affected by the heavy rain disasters occurring across Japan. We hope you’ll be able to get back on your feet, in both body and mind, as soon as possible.

Store description

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

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Prices, ranks and reviews are per country. Revenue above is already worldwide.