# おおいた防災アプリ vs 河川カメラ

The clearest difference is in-app purchases: おおいた防災アプリ at none against 河川カメラ's 4. おおいた防災アプリ also leads on ads (none vs shown) and iOS requirement (9.0 vs 15.6). 河川カメラ's advantage is update cadence (every 2 weeks vs every 5 months). On price, rating, review sentiment and ratings volume there is nothing between them.

Both are free to download. 河川カメラ sells 4 one-off in-app purchases. おおいた防災アプリ asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for おおいた防災アプリ against 5.0 for 河川カメラ. Both are backed by a comparable volume of ratings — 1 and 1 respectively. Written reviews are what separate them: 25% of おおいた防災アプリ's written reviews are positive against 24% of 河川カメラ's.

おおいた防災アプリ ships an update every 5 months, 河川カメラ every 2 weeks. The most recent releases landed on October 26, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | おおいた防災アプリ | 河川カメラ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/id1455301571/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/river/id1566760183/reviews) |
| Number of ratings | 1 | 1 |
| Positive reviews | **25.0% of reviews** | 24.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 5 months | **Every 2 weeks** |
| Monetization | — | Free with in-app purchases |
| Size | 129 MB | 110 MB |
| Requires iOS | **9.0** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Oita Prefecture](https://appshunter.io/developer/1455301570) | [hidehiko aihara](https://appshunter.io/developer/1178520609) |

## What reviewers say

### おおいた防災アプリ

[App page](https://appshunter.io/ios/app/id1455301571)

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

**In-app purchases:** none


### 河川カメラ

[App page](https://appshunter.io/ios/app/river/id1566760183)

Access real-time river conditions and weather forecasts across Japan. View over 10,000 river locations on a map and check detailed precipitation, temperature, and snow data. Stay informed about weather changes to prepare for heavy rain and other natural events.

**Highlights:** Real-time river information map, Over 10,000 river locations, Live camera stills of rivers, Automatic and manual data updates, Detailed weather forecasts, Rainfall intensity visualization, Favorite locations

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

**In-app purchases (4)**

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


## Frequently asked questions

### Is おおいた防災アプリ free?

おおいた防災アプリ is free to download, with no in-app purchases.

### Is 河川カメラ free?

河川カメラ is free to download, with in-app purchases available.

### Which has better reviews, おおいた防災アプリ or 河川カメラ?

おおいた防災アプリ and 河川カメラ are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do おおいた防災アプリ or 河川カメラ have ads?

河川カメラ shows ads; おおいた防災アプリ does not.

### Which is updated more often, おおいた防災アプリ or 河川カメラ?

おおいた防災アプリ ships an update every 5 months, and 河川カメラ every 2 weeks. Most recently, おおいた防災アプリ was updated on October 26, 2026 and 河川カメラ 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.*