# PREP（プレップ） vs EQMonitor 地震速報

The clearest difference is review sentiment: EQMonitor 地震速報 at 89% against PREP（プレップ）'s 29%. EQMonitor 地震速報 also leads on rating (5.0 vs 2.3) and ads (none vs shown). On price, ratings volume, 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 EQMonitor 地震速報 sells 4 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

EQMonitor 地震速報 holds the better App Store score, 5.0 against 2.3. Both are backed by a comparable volume of ratings — 6 and 6 respectively. Written reviews point the same way: 29% of PREP（プレップ）'s written reviews are positive against 89% of EQMonitor 地震速報's.

PREP（プレップ） ships an update every 6 weeks, EQMonitor 地震速報 every 11 days. The most recent releases landed on September 23, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | PREP（プレップ） | EQMonitor 地震速報 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.3 (6 ratings)](https://appshunter.io/ios/app/prep/id398954883/reviews) | **[5.0 (6 ratings)](https://appshunter.io/ios/app/eqmonitor/id6447546703/reviews)** |
| Number of ratings | 6 | 6 |
| Positive reviews | 29.1% of reviews | **89.3% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 6 weeks | **Every 11 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 90 MB | 79 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [RC Solution Co.](https://appshunter.io/developer/398954886) | [Ryotaro Onoue](https://appshunter.io/developer/1681712231) |

## 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 |


### EQMonitor 地震速報

[App page](https://appshunter.io/ios/app/eqmonitor/id6447546703)

Receive timely earthquake and urgent earthquake early warning notifications for Japan. View past earthquake history with a detailed database and see real-time P-wave and S-wave predictions. Access the Strong Motion Monitor for visual earthquake data.

**Highlights:** Earthquake and early warning notifications, Customizable notification conditions by region, View past earthquake history (since 1919), Real-time display of urgent earthquake warnings, P-wave/S-wave arrival and epicenter display, Access to Strong Motion Monitor

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| コーヒー | $0.49 | one-time |
| エナジードリンクセット | $1.99 | one-time |
| 美味しい牛肉 | $5.99 | one-time |
| うな重 | $19.99 | one-time |


## 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 EQMonitor 地震速報 free?

EQMonitor 地震速報 is free to download, with in-app purchases available.

### Which has better reviews, PREP（プレップ） or EQMonitor 地震速報?

EQMonitor 地震速報 is rated higher. PREP（プレップ） averages 2.3 out of 5 from 6 ratings, while EQMonitor 地震速報 averages 5.0 from 6 ratings.

### Do PREP（プレップ） or EQMonitor 地震速報 have ads?

PREP（プレップ） shows ads; EQMonitor 地震速報 does not.

### Which is updated more often, PREP（プレップ） or EQMonitor 地震速報?

PREP（プレップ） ships an update every 6 weeks, and EQMonitor 地震速報 every 11 days. Most recently, PREP（プレップ） was updated on September 23, 2026 and EQMonitor 地震速報 on September 24, 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.*