# 海天気.jp vs 河川カメラ RiverPulse

The clearest difference is in-app purchases: 海天気.jp at none against 河川カメラ RiverPulse's 3. 海天気.jp also leads on iOS requirement (13.0 vs 18.6). 河川カメラ RiverPulse's advantage is update cadence (monthly vs every 4 months). On price, ads and device support there is nothing between them.

Both are free to download. 河川カメラ RiverPulse sells 3 one-off in-app purchases. 海天気.jp asks for nothing beyond the download.

海天気.jp ships an update every 4 months, 河川カメラ RiverPulse monthly. The most recent releases landed on September 10, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | 海天気.jp | 河川カメラ RiverPulse |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 85.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 4 months | **Monthly** |
| Monetization | Ad-supported | — |
| Size | 37 MB | 101 MB |
| Requires iOS | **13.0** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Risesystem, inc.](https://appshunter.io/developer/427437064) | [hidehiko aihara](https://appshunter.io/developer/1178520609) |

## What reviewers say

### 海天気.jp

[App page](https://appshunter.io/ios/app/jp/id1641843175)

Get detailed, hourly weather forecasts for over 8,000 marine spots, including wind, temperature, and wave height. Visualize precipitation with clear icons and access 14-day outlooks for planning. Also provides city-level forecasts and rain cloud movement.

**Highlights:** Hourly forecasts for 8,000+ marine spots, Up to 84-hour pinpoint weather predictions, 14-day weather outlooks, Rain cloud and lightning movement visualization, Tide graphs and sea temperature maps, City-level weather forecasts, Favorite spot bookmarking

**In-app purchases:** none


### 河川カメラ RiverPulse

[App page](https://appshunter.io/ios/app/riverpulse/id6787630906)

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

**In-app purchases (3)**

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


## Frequently asked questions

### Is 海天気.jp free?

海天気.jp is free to download, with no in-app purchases.

### Is 河川カメラ RiverPulse free?

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

### Do 海天気.jp or 河川カメラ RiverPulse have ads?

Both 海天気.jp and 河川カメラ RiverPulse show ads.

### Which is updated more often, 海天気.jp or 河川カメラ RiverPulse?

海天気.jp ships an update every 4 months, and 河川カメラ RiverPulse monthly. Most recently, 海天気.jp was updated on September 10, 2026 and 河川カメラ RiverPulse on September 23, 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.*