# PREP（プレップ） vs NERV Disaster Prevention

The clearest difference is review sentiment: NERV Disaster Prevention at 81% against PREP（プレップ）'s 29%. NERV Disaster Prevention also leads on rating (4.7 vs 2.3) and ads (none vs shown). On price, update cadence, in-app purchases and monetization model there is nothing between them.

Both are free to download. PREP（プレップ） sells 2 in-app purchases, starting at $0.99 per month and NERV Disaster Prevention sells 2 in-app purchases, starting at $2.49 per month. Whichever you choose, the download price is not the number that matters.

NERV Disaster Prevention holds the better App Store score, 4.7 against 2.3. That said, the two scores are not equally well evidenced: NERV Disaster Prevention has 47 ratings behind it against 6, so its average is the more settled of the two. Written reviews point the same way: 29% of PREP（プレップ）'s written reviews are positive against 81% of NERV Disaster Prevention's.

Both ship on a similar rhythm, roughly every 6 weeks. The most recent releases landed on September 23, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | PREP（プレップ） | NERV Disaster Prevention |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.3 (6 ratings)](https://appshunter.io/ios/app/prep/id398954883/reviews) | **[4.7 (47 ratings)](https://appshunter.io/ios/app/nerv-disaster-prevention/id1472338480/reviews)** |
| Number of ratings | 6 | **47** |
| Positive reviews | 29.1% of reviews | **81.1% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 6 weeks | Every 6 weeks |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Best chart rank | — | **#96** |
| Size | 90 MB | 76 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [RC Solution Co.](https://appshunter.io/developer/398954886) | [Gehirn Inc.](https://appshunter.io/developer/1451034052) |

## What reviewers say

### PREP（プレップ）

[App page](https://appshunter.io/ios/app/prep/id398954883)

This app provides real-time disaster information based on your current location, including alerts for earthquakes, tsunamis, and heavy rain. It helps you plan for disasters by allowing you to set action plans and share information with family members. The app also offers guidance during emergencies to ensure safe actions.

**Highlights:** Real-time disaster information by location, Disaster action planning, Emergency guidance, Family information sharing, Various disaster alerts (earthquake, tsunami, rain, etc.), Precipitation forecast timeline

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PREP Premium Service | $0.99 | per month |
| PREP ファミリーサービス | $3.49 | per month |


### NERV Disaster Prevention

[App page](https://appshunter.io/ios/app/nerv-disaster-prevention/id1472338480)

**Currently charting:** #96 Top Free · Weather (US App Store)

This app provides critical disaster warnings for earthquakes, tsunamis, volcanic eruptions, and weather-related events like floods and landslides. It offers real-time information optimized for your current and registered locations, helping you make informed decisions during emergencies.

**Highlights:** Earthquake, tsunami, volcanic eruption warnings, Weather-related disaster prevention info, Location-optimized alerts, Real-time map interaction, Urgency-based notification sorting, Critical Alerts for imminent danger, Barrier-free design

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| E Plan | $2.49 | per month |
| EE Plan | $4.49 | per month |


## Frequently asked questions

### Is PREP（プレップ） free?

PREP（プレップ） is free to download, with in-app purchases available.

### Is NERV Disaster Prevention free?

NERV Disaster Prevention is free to download, with in-app purchases available.

### Which has better reviews, PREP（プレップ） or NERV Disaster Prevention?

NERV Disaster Prevention is rated higher. PREP（プレップ） averages 2.3 out of 5 from 6 ratings, while NERV Disaster Prevention averages 4.7 from 47 ratings.

### Do PREP（プレップ） or NERV Disaster Prevention have ads?

PREP（プレップ） shows ads; NERV Disaster Prevention does not.

### Which is updated more often, PREP（プレップ） or NERV Disaster Prevention?

PREP（プレップ） ships an update every 6 weeks, and NERV Disaster Prevention every 6 weeks. Most recently, PREP（プレップ） was updated on September 23, 2026 and NERV Disaster Prevention on September 25, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*