# Tide Pro vs 中国海洋预报（公众版）

The clearest difference is in-app purchases: 中国海洋预报（公众版） at none against Tide Pro's 2. 中国海洋预报（公众版） also leads on ads (none vs shown) and iOS requirement (9.0 vs 14.0). On price, update cadence 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（公众版） asks for nothing beyond the download.

Tide Pro ships an update every 2 months, 中国海洋预报（公众版） monthly. The most recent releases landed on September 19, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | Tide Pro | 中国海洋预报（公众版） |
| --- | --- | --- |
| 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 | **Monthly** |
| Monetization | Free with in-app purchases | — |
| Size | 121 MB | 48 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（公众版）

[App page](https://appshunter.io/ios/app/id1532384185)

**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（公众版） free?

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

### Do Tide Pro or 中国海洋预报（公众版） have ads?

Tide Pro shows ads; 中国海洋预报（公众版） does not.

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

Tide Pro ships an update every 2 months, and 中国海洋预报（公众版） monthly. Most recently, Tide Pro was updated on September 19, 2026 and 中国海洋预报（公众版） on September 8, 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.*