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NERV Disaster Prevention

Gehirn Inc. · Weather · United States store
NOT IN TOP 100 HERE
View on App Store ↗ Google Play version →
Revenue a month, worldwide EST
$49.4K
Likely $16.5K to $148.3K
New ratings
Tracking
Daily counts start building from today
Rating
4.7 of 5
47 ratings in this store
Countries it ranks in
3
was 3 on Oct 15, 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 · BOTH STORES
$49.4K
Range $16.5K to $148.3K
EST. REVENUE / YEAR · WORLDWIDE
$593.3K
Both stores combined. Small app estimate, so no split per store
EST. LIFETIME DOWNLOADS
1.6K to 4.7K
Estimated from ratings count
WHERE IT EARNS · EST. / MONTH
  • Japan #7 Weather (Play)$48.2K · 98%
  • Ukraine #35 Weather (Play)$1.1K · 2%
  • Greece #39 Weather (Play)$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
47
AVG RATING
4.66
PRICE
Free
AGE
5.1y
LAST UPDATE
35d ago
VERSION
7.1.0
SIZE
76 MB
AGE RATING
4+

Last 29 days

From our daily snapshots of every grossing chart.

DAYS IN A GROSSING CHART
29 / 29
COUNTRIES NOW
6 (was 2)
EST. REVENUE A MONTH, DAILY · BOTH STORES EST
Show daily values
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Oct 21, 2026$840.7K a month
Oct 22, 2026not in a grossing chart
The same estimate as the headline, saved every day. Best rank Sep 24, 2026: #10 Weather · JP. Now: #5 Weather · JP.

Money and momentum

Measured from the store, not estimated.

WHAT IT CHARGES
2 purchases listed
  • EE Plan$4.49
  • E Plan$2.49
Top in-app purchases as listed on the App Store, in local prices.
REVIEW MOMENTUM
0.1 reviews / week
  • Recent reviews average4.5 stars
  • Recent 1 and 2 star share11%
From the latest 19 written reviews, covering 1874 days.
RELEASE CADENCE
3 updates in 90 days
  • Typical gap between releases39 days
From the last 25 versions listed on the App Store.
RATING BREAKDOWN
47 ratings
5★83%
4★9%
3★2%
2★4%
1★2%

What users say

Latest reviews, United States App Store.

★★★★★Sep 17, 2026
Must use!

Used this app while visiting Japan. We were there during heavy Typhoons. This app notified me of all information I needed to know and also warned us of areas that were flooding! Highly recommend this app!!

★★★★★Sep 17, 2026
Excellent weather & disaster information

The NERV app is the best I've found in Japan for alerts and information about dangerous weather, earthquakes, and disasters. It's a must-have app for residents of Japan, including Japanese nationals, but especially for English speakers!

★★★★★Aug 22, 2026
Awesome app!

While I was staying in Japan, the app woke us up at 2 am and warned us of an earthquake. I was able to get out of my hotel room and safely exit outside. If not for this app, I think I might of slept through the emergency service warning. It also told me if there were any tsunami warnings after. For reference: the earthquake was a 5.9 and hit Urayasu

★★★★★Jul 13, 2026
Awesomesauce

Dude it’s NERV

★★★★★Jul 3, 2026
Fast, helpful, tasteful, good UI

I recently moved to Japan. This app notifies me ahead of any other app I have. And the user interface is simple to use, allowing me to add various regions I want to receive notifications for. I clicked on the banner notification of an earthquake today and was instantly shown the anticipated strength and a map showing a live estimate of the anticipated shock that I could watch reach my area. This let me know it should be a relatively mild experience, but if it was going to be anything more serious I would need to leave the building. Fortunately it was a relatively small occurrence today, but I greatly appreciate that I didn’t have to click through any menus for all of the important information in the moment. Thank you so much for your efforts with this app to give us such instant information.

★★★★★May 15, 2026
Not an early notification

Earthquake notifications come after it has happened. So keep that in mind.

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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.

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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.

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 (Weather Information notifications can be disabled in Menu > 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. ◆ Development Team Update On August 30, the development team participated in the Miyagi Prefecture Comprehensive Disaster Prevention Drill together with the NERV Disaster Response Vehicle. It unfortunately rained that day, but many people still came out to see us, with visitors stopping by to tell us “I use the app!” and “I saw you on X, so I came to visit!” Some even joined the Supporters’ Club on the spot, reminding us once again just how much support we receive from all of you. With the recent days of heavy rain, Emergency Warnings have been issued frequently late at night, and our team has had many sleepless days working around the clock. This update improves how we handle Weather Information reports, linear rainband information, Record-Breaking Short-Period Heavy Rainfall information, and others. We hope this makes the app more useful the next time heavy rain comes around.

Released Aug 31, 2021. Current version shipped Sep 17, 2026.

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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