# PREP（プレップ） vs 災害地図

The clearest difference is price: PREP（プレップ） at Free against 災害地図's $1.99. PREP（プレップ） also leads on update cadence (every 6 weeks vs every 17 months). 災害地図's advantage is in-app purchases (none vs 2) and ads (none vs shown). On device support there is nothing between them.

PREP（プレップ） is free to download; 災害地図 costs $1.99 up front. PREP（プレップ） sells 2 in-app purchases, starting at $0.99 per month. 災害地図 asks for nothing beyond the download.

PREP（プレップ） ships an update every 6 weeks, 災害地図 every 17 months. The most recent releases landed on September 23, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | PREP（プレップ） | 災害地図 |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | **[2.3 (6 ratings)](https://appshunter.io/ios/app/prep/id398954883/reviews)** | — |
| Number of ratings | **6** | — |
| Positive reviews | 29.1% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 6 weeks** | Every 17 months |
| Monetization | Free with in-app purchases | — |
| Size | 90 MB | 46 MB |
| Requires iOS | 15.0 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [RC Solution Co.](https://appshunter.io/developer/398954886) | [Masahiro Tomosada](https://appshunter.io/developer/1587710118) |

## 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 |


### 災害地図

[App page](https://appshunter.io/ios/app/id1636485372)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## 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 災害地図 free?

災害地図 costs $1.99, with no in-app purchases.

### Do PREP（プレップ） or 災害地図 have ads?

PREP（プレップ） shows ads; 災害地図 does not.

### Which is updated more often, PREP（プレップ） or 災害地図?

PREP（プレップ） ships an update every 6 weeks, and 災害地図 every 17 months. Most recently, PREP（プレップ） was updated on September 23, 2026 and 災害地図 on September 21, 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.*