# Tide Pro vs 中国海洋预报（专业版）

The clearest difference is in-app purchases: 中国海洋预报（专业版） at none against Tide Pro's 2. 中国海洋预报（专业版） also leads on ads (none vs shown) and update cadence (every 2 weeks vs every 2 months). On price and device support there is nothing between them.

Both are free to download. Tide Pro sells 2 one-off in-app purchases. 中国海洋预报（专业版） asks for nothing beyond the download.

Tide Pro ships an update every 2 months, 中国海洋预报（专业版） every 2 weeks. The most recent releases landed on October 24, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Tide Pro | 中国海洋预报（专业版） |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/tide-pro/id1528292517/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 37.5% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 121 MB | 47 MB |
| Requires iOS | 14.0 | **9.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [娜 金](https://appshunter.io/developer/1523130771) | [National Marine Enviromental Forecasting Center](https://appshunter.io/developer/1532384187) |

## What reviewers say

### Tide Pro

[App page](https://appshunter.io/ios/app/tide-pro/id1528292517)

This app provides high-precision forecasts for ocean weather, including astronomical tides, storm surges, and merged ocean currents. It offers detailed data on wave conditions, ocean currents at various depths, and marine bio-chemistry. Users can also access seabed elevation and field water/soil temperatures.

**Highlights:** Astronomical tide and currents forecast, 6-Day storm surge forecast, Merged ocean-currents approach, Ocean wave forecast, Ocean currents forecast, Ocean bio-chemistry forecast, Seabed elevation data

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Month VIP | $14.99 | one-time |
| 1 Year VIP | $49.99 | one-time |


### 中国海洋预报（专业版）

[App page](https://appshunter.io/ios/app/id1542158663)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Tide Pro free?

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

### Is 中国海洋预报（专业版） free?

中国海洋预报（专业版） is free to download, with no in-app purchases.

### Do Tide Pro or 中国海洋预报（专业版） have ads?

Tide Pro shows ads; 中国海洋预报（专业版） does not.

### Which is updated more often, Tide Pro or 中国海洋预报（专业版）?

Tide Pro ships an update every 2 months, and 中国海洋预报（专业版） every 2 weeks. Most recently, Tide Pro was updated on October 24, 2026 and 中国海洋预报（专业版） on October 27, 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.*