# Seaside Buoy vs 被害予測・防災cmap

The clearest difference is rating: Seaside Buoy at 4.6 against 被害予測・防災cmap's 3.6. Seaside Buoy also leads on review sentiment (56% vs 27%) and update cadence (every 3 weeks vs every 2 months). 被害予測・防災cmap's advantage is in-app purchases (none vs 4) and ads (none vs shown). On price and device support there is nothing between them.

Both are free to download. Seaside Buoy sells 4 one-off in-app purchases. 被害予測・防災cmap asks for nothing beyond the download.

Seaside Buoy holds the better App Store score, 4.6 against 3.6. That said, the two scores are not equally well evidenced: Seaside Buoy has 892 ratings behind it against 98, so its average is the more settled of the two. Written reviews point the same way: 56% of Seaside Buoy's written reviews are positive against 27% of 被害予測・防災cmap's.

Seaside Buoy ships an update every 3 weeks, 被害予測・防災cmap every 2 months. The most recent releases landed on September 24, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Seaside Buoy | 被害予測・防災cmap |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (892 ratings)](https://appshunter.io/ios/app/seaside-buoy/id1240094859/reviews)** | [3.6 (98 ratings)](https://appshunter.io/ios/app/cmap/id1524623479/reviews) |
| Number of ratings | **892** | 98 |
| Positive reviews | **55.9% of reviews** | 26.9% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 23 MB | 31 MB |
| Requires iOS | **11.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ENC Data](https://appshunter.io/developer/1240094858) | [Aioi Nissay Dowa Insurance Co.,Ltd.](https://appshunter.io/developer/438886751) |

## What reviewers say

### Seaside Buoy

[App page](https://appshunter.io/ios/app/seaside-buoy/id1240094859)

Access live scientific data from ocean buoys globally. View water temperature, swell height, and more from public scientific organizations. Features include automatic closest buoy selection, map browsing, favorites, and distance/bearing calculations.

**Highlights:** Live buoy data worldwide, Water temperature and swell height, Automatic closest buoy selection, Map and list browsing, Favorite buoys, Distance and bearing to buoy

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Small Tip | $0.99 | one-time |
| Remove Ads | $2.99 | one-time |
| Medium Tip | $2.99 | one-time |
| Large Tip | $4.99 | one-time |

**What reviewers like**

- 🙏 Thanks
- 👍 Great app and useful
- 👍 Very well built and extremely useful
- 👍 So useful!
- 👍 Real information, what a concept!

**What reviewers complain about**

- ⚠️ Doesn't track where you are
- 🙄 Nag nag nag
- 😕 Accurate info - I just don't care what the ride was 4 days ago!
- ⚠️ Stopped working June-2023
- ⚠️ Illegible print

**Reported bugs**

- Graph view doesn't render properly
- Crashes every time tried using it
- Stopped loading buoy data suddenly

**Requested features**

- Add swell info
- Add Celsius temperature display


### 被害予測・防災cmap

[App page](https://appshunter.io/ios/app/cmap/id1524623479)

This app provides regional risk information, including natural disasters, accidents, and emergencies. It offers push notifications for disaster alerts, severe weather, and evacuation orders. Users can also access weather forecasts, life indicators, and hazard maps.

**Highlights:** Disaster risk prediction and mapping, Emergency and evacuation alerts, Severe weather notifications, Hazard map and evacuation site information, Weather forecasts and life indicators, Traffic and accessibility information

**In-app purchases:** none


## Frequently asked questions

### Is Seaside Buoy free?

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

### Is 被害予測・防災cmap free?

被害予測・防災cmap is free to download, with no in-app purchases.

### Which has better reviews, Seaside Buoy or 被害予測・防災cmap?

Seaside Buoy is rated higher. Seaside Buoy averages 4.6 out of 5 from 892 ratings, while 被害予測・防災cmap averages 3.6 from 98 ratings.

### Do Seaside Buoy or 被害予測・防災cmap have ads?

Seaside Buoy shows ads; 被害予測・防災cmap does not.

### Which is updated more often, Seaside Buoy or 被害予測・防災cmap?

Seaside Buoy ships an update every 3 weeks, and 被害予測・防災cmap every 2 months. Most recently, Seaside Buoy was updated on September 24, 2026 and 被害予測・防災cmap on September 22, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*