# P2P地震情報 モバイル vs 河川水位

The clearest difference is review sentiment: P2P地震情報 モバイル at 50% against 河川水位's 14%. P2P地震情報 モバイル also leads on in-app purchases (none vs 4) and ads (none vs shown). 河川水位's advantage is update cadence (every 5 weeks vs every 7 months). On price and device support there is nothing between them.

Both are free to download. 河川水位 sells 4 one-off in-app purchases. P2P地震情報 モバイル asks for nothing beyond the download.

P2P地震情報 モバイル ships an update every 7 months, 河川水位 every 5 weeks. The most recent releases landed on November 2, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | P2P地震情報 モバイル | 河川水位 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | **50.0% of reviews** | 14.3% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 7 months | **Every 5 weeks** |
| Monetization | Free | — |
| Size | 23 MB | 73 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Takuya Yamaguchi](https://appshunter.io/developer/1457443046) | [hidehiko aihara](https://appshunter.io/developer/1178520609) |

## What reviewers say

### P2P地震情報 モバイル

[App page](https://appshunter.io/ios/app/p2p/id1457443047)

Receive real-time earthquake and tsunami alerts from the Japan Meteorological Agency. Share your own "shook!" reports with other users, which are then mapped. Get push notifications for instant updates and review past information.

**Highlights:** Earthquake and tsunami alerts, User-shared shaking reports, Real-time mapping of reports, Push notifications, Historical data view

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

**In-app purchases:** none


### 河川水位

[App page](https://appshunter.io/ios/app/id1595112434)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Coffee (Regular) | $0.49 | one-time |
| 開発者応援募金 | $1.99 | one-time |
| Coffee (Large) | $1.99 | one-time |
| Cake Set | $5.99 | one-time |


## Frequently asked questions

### Is P2P地震情報 モバイル free?

P2P地震情報 モバイル is free to download, with no in-app purchases.

### Is 河川水位 free?

河川水位 is free to download, with in-app purchases available.

### Do P2P地震情報 モバイル or 河川水位 have ads?

河川水位 shows ads; P2P地震情報 モバイル does not.

### Which is updated more often, P2P地震情報 モバイル or 河川水位?

P2P地震情報 モバイル ships an update every 7 months, and 河川水位 every 5 weeks. Most recently, P2P地震情報 モバイル was updated on November 2, 2026 and 河川水位 on October 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.*