# 海天気.jp vs タイドグル

The clearest difference is ads: タイドグル at none against 海天気.jp's shown. タイドグル also leads on update cadence (every 5 days vs every 4 months) and review sentiment (100% vs 85%). 海天気.jp's advantage is monetization model (ad-supported vs freemium). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

海天気.jp ships an update every 4 months, タイドグル every 5 days. The most recent releases landed on October 19, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | 海天気.jp | タイドグル |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 85.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 4 months | **Every 5 days** |
| Monetization | **Ad-supported** | Freemium |
| Size | 37 MB | 41 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Risesystem, inc.](https://appshunter.io/developer/427437064) | [SHUKUTOKU KOKUSAI, K.K.](https://appshunter.io/developer/6780454806) |

## 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


### タイドグル

[App page](https://appshunter.io/ios/app/id6780696121)

This app provides tide charts, weather forecasts, and fishing catch logs for sea fishing. It helps plan fishing trips with tide graphs, find fishing spots on a map, and record catches with photos and notes for future reference.

**Highlights:** Tide charts and graphs, Weather and sea forecasts, Fishing spot finder, Catch logging with photos, AI-assisted photo input, My Points saving, Catch sharing

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

**In-app purchases:** none


## Frequently asked questions

### Is 海天気.jp free?

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

### Is タイドグル free?

タイドグル is free to download, with no in-app purchases.

### Do 海天気.jp or タイドグル have ads?

海天気.jp shows ads; タイドグル does not.

### Which is updated more often, 海天気.jp or タイドグル?

海天気.jp ships an update every 4 months, and タイドグル every 5 days. Most recently, 海天気.jp was updated on October 19, 2026 and タイドグル on October 17, 2026.

---

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