# PREP（プレップ） vs Earthquake

The clearest difference is review sentiment: Earthquake at 73% against PREP（プレップ）'s 29%. Earthquake 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 Earthquake sells 2 in-app purchases, starting at $4.99 per year. Whichever you choose, the download price is not the number that matters.

Earthquake holds the better App Store score, 4.7 against 2.3. That said, the two scores are not equally well evidenced: Earthquake has 51K 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 73% of Earthquake's.

PREP（プレップ） ships an update every 6 weeks, Earthquake every 4 weeks. The most recent releases landed on September 23, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | PREP（プレップ） | Earthquake |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.3 (6 ratings)](https://appshunter.io/ios/app/prep/id398954883/reviews) | **[4.7 (51K ratings)](https://appshunter.io/ios/app/earthquake-alerts-and-map/id632040358/reviews)** |
| Number of ratings | 6 | **51K** |
| Positive reviews | 29.1% of reviews | **73.2% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 6 weeks | **Every 4 weeks** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Best chart rank | — | **#161** |
| Size | 90 MB | 53 MB |
| Requires iOS | **15.0** | 16.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [RC Solution Co.](https://appshunter.io/developer/398954886) | [Nico Tranquilli](https://appshunter.io/developer/341326067) |

## 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 |


### Earthquake

[App page](https://appshunter.io/ios/app/earthquake-alerts-and-map/id632040358)

**Currently charting:** #161 Top Free · Weather (US App Store)

Stay informed about seismic activity with real-time global earthquake data and customizable push notifications. Visualize events on an interactive map, access a historical catalog, and contribute to community reports. Includes tsunami bulletins and detailed event information.

**Highlights:** Real-time global earthquake data, Customizable push notifications, Interactive earthquake map, Historical earthquake catalog, Report felt earthquakes, Tsunami bulletins, Home and Lock Screen widgets

**Features:** macOS Compatibility, Family Sharing, Apple Watch app

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PRO Version (annual) | $4.99 | per year |
| PRO Version (lifetime) | $9.99 | one-time |

**What reviewers like**

- 🚀 Real-time earthquake updates
- 🌍 Worldwide earthquake coverage
- 📊 Detailed earthquake information
- 🔔 Customizable alert settings
- 🗺️ Intuitive map interface

**What reviewers complain about**

- 🕰️ Delayed notifications
- 🔒 Limited free features
- 🗺️ Lack of advanced map options
- 🔊 Weak alert sound
- 🌎 Missing some regional earthquake data

**Reported bugs**

- Inconsistent earthquake data reporting
- Issues with pro version activation and functionality

**Requested features**

- Ability to set multiple location alerts
- Option to view earthquake history and trends
- Integration with other disaster monitoring services
- More customization for alert settings
- Improved map features (e.g., terrain view, fault lines)


## 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 Earthquake free?

Earthquake is free to download, with in-app purchases available.

### Which has better reviews, PREP（プレップ） or Earthquake?

Earthquake is rated higher. PREP（プレップ） averages 2.3 out of 5 from 6 ratings, while Earthquake averages 4.7 from 51K ratings.

### Do PREP（プレップ） or Earthquake have ads?

PREP（プレップ） shows ads; Earthquake does not.

### Which is updated more often, PREP（プレップ） or Earthquake?

PREP（プレップ） ships an update every 6 weeks, and Earthquake every 4 weeks. Most recently, PREP（プレップ） was updated on September 23, 2026 and Earthquake 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.*