# 河川カメラ vs 川レーダー｜ダム放流・水位アラート

The clearest difference is in-app purchases: 川レーダー｜ダム放流・水位アラート at none against 河川カメラ's 4. 川レーダー｜ダム放流・水位アラート also leads on ads (none vs shown). On update cadence, device support and iOS requirement there is nothing between them.

河川カメラ ships an update every 2 weeks, 川レーダー｜ダム放流・水位アラート every 3 weeks. The most recent releases landed on September 28, 2026 and September 12, 2026 respectively.

## The numbers

| Metric | 河川カメラ | 川レーダー｜ダム放流・水位アラート |
| --- | --- | --- |
| Price | **Free** | — |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/river/id1566760183/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 24.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 2 weeks** | Every 3 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 110 MB | 46 MB |
| Requires iOS | 15.6 | **15.1** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [hidehiko aihara](https://appshunter.io/developer/1178520609) | [YUKI NISHIGAWA](https://appshunter.io/developer/6773584761) |

## What reviewers say

### 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 |


### 川レーダー｜ダム放流・水位アラート

[App page](https://appshunter.io/ios/app/id6773584759)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 河川カメラ free?

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

### Is 川レーダー｜ダム放流・水位アラート free?

Pricing for 川レーダー｜ダム放流・水位アラート is not currently listed on the App Store.

### Do 河川カメラ or 川レーダー｜ダム放流・水位アラート have ads?

河川カメラ shows ads; 川レーダー｜ダム放流・水位アラート does not.

### Which is updated more often, 河川カメラ or 川レーダー｜ダム放流・水位アラート?

河川カメラ ships an update every 2 weeks, and 川レーダー｜ダム放流・水位アラート every 3 weeks. Most recently, 河川カメラ was updated on September 28, 2026 and 川レーダー｜ダム放流・水位アラート on September 12, 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.*