# TidalWatch vs Surf Rack

The clearest difference is in-app purchases: Surf Rack at none against TidalWatch's 20. TidalWatch's advantage is ads (none vs shown) and iOS requirement (9.0 vs 15.1). On price, update cadence and device support there is nothing between them.

Both are free to download. TidalWatch sells 20 in-app purchases, starting at $0.99 per year. Surf Rack asks for nothing beyond the download.

TidalWatch ships an update every 3 weeks, Surf Rack every 2 months. The most recent releases landed on October 12, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | TidalWatch | Surf Rack |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Monetization | Free with in-app purchases | — |
| Size | 53 MB | 63 MB |
| Requires iOS | **9.0** | 15.1 |
| Devices | **iPhone, iPod, Apple Watch** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Shinichi HISAMATSU](https://appshunter.io/developer/398895004) | [OCEAN LIBERTA LIMITED LIABILITY CO.](https://appshunter.io/developer/1621934040) |

## What reviewers say

### TidalWatch

[App page](https://appshunter.io/ios/app/tidalwatch/id1092875095)

This app provides tide charts and barometric pressure forecasts for over 300 locations in Japan. Quickly check tide times and conditions directly on your Apple Watch, ideal for fishing, surfing, or shellfish gathering without needing your iPhone.

**Highlights:** Apple Watch tide charts, Barometric pressure forecasts, Over 300 Japanese locations, Tide and high/low tide times, Quick access on Apple Watch

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (20)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 福島県 年間ライセンス | $0.99 | per year |
| 千葉県 年間ライセンス | $0.99 | per year |
| 福岡県 年間ライセンス | $0.99 | per year |
| 佐賀県 年間ライセンス | $0.99 | per year |
| 長崎県 年間ライセンス | $0.99 | per year |
| 熊本県 年間ライセンス | $0.99 | per year |
| 大分県 年間ライセンス | $0.99 | per year |
| 宮崎県 年間ライセンス | $0.99 | per year |
| 鹿児島県 年間ライセンス | $0.99 | per year |
| 沖縄県 年間ライセンス | $0.99 | per year |
| 年間ライセンス 北海道 | $0.99 | per year |
| 北海道地方 年間ライセンス | $1.99 | per year |
| 北海道・東北地方 年間ライセンス | $1.99 | per year |
| 関東・信越地方 年間ライセンス | $1.99 | per year |
| 北陸・東海地方 年間ライセンス | $1.99 | per year |
| 近畿地方 年間ライセンス | $1.99 | per year |
| 四国地方 年間ライセンス | $1.99 | per year |
| 中国地方 年間ライセンス | $1.99 | per year |
| 九州・沖縄地方 年間ライセンス | $1.99 | per year |
| 年間ライセンス 全国 | $4.99 | per year |


### Surf Rack

[App page](https://appshunter.io/ios/app/surf-rack/id1621934038)

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


## Frequently asked questions

### Is TidalWatch free?

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

### Is Surf Rack free?

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

### Do TidalWatch or Surf Rack have ads?

Surf Rack shows ads; TidalWatch does not.

### Which is updated more often, TidalWatch or Surf Rack?

TidalWatch ships an update every 3 weeks, and Surf Rack every 2 months. Most recently, TidalWatch was updated on October 12, 2026 and Surf Rack on October 6, 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.*