# 潮位アラート vs TideFish

The clearest difference is ads: 潮位アラート at none against TideFish's shown. 潮位アラート also leads on device support (3 vs 1) and iOS requirement (15.0 vs 17.6). On price, update cadence and in-app purchases there is nothing between them.

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

潮位アラート ships an update every 6 weeks, TideFish every 3 weeks. The most recent releases landed on October 18, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | 潮位アラート | TideFish |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 6 weeks | **Every 3 weeks** |
| Size | 255 MB | 6 MB |
| Requires iOS | **15.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [OSD LLC](https://appshunter.io/developer/542270544) | [Osamu Ishigami](https://appshunter.io/developer/901265058) |

## What reviewers say

### 潮位アラート

[App page](https://appshunter.io/ios/app/id6756205355)

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

**In-app purchases:** none


### TideFish

[App page](https://appshunter.io/ios/app/tidefish/id6789813654)

**In-app purchases:** none


## Frequently asked questions

### Is 潮位アラート free?

潮位アラート is free to download, with no in-app purchases.

### Is TideFish free?

TideFish is free to download, with no in-app purchases.

### Do 潮位アラート or TideFish have ads?

TideFish shows ads; 潮位アラート does not.

### Which is updated more often, 潮位アラート or TideFish?

潮位アラート ships an update every 6 weeks, and TideFish every 3 weeks. Most recently, 潮位アラート was updated on October 18, 2026 and TideFish on October 25, 2026.

---

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