# 潮汐表 Pro vs SwellLab

The clearest difference is update cadence: SwellLab at every 3 days against 潮汐表 Pro's every 7 months. 潮汐表 Pro's advantage is device support (3 vs 1) and iOS requirement (15.0 vs 18.0). On price, ads and in-app purchases there is nothing between them.

Both are free to download. 潮汐表 Pro sells 2 in-app purchases, starting at $1.99 per month and SwellLab sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

潮汐表 Pro ships an update every 7 months, SwellLab every 3 days. Both last shipped on October 16, 2026.

## The numbers

| Metric | 潮汐表 Pro | SwellLab |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 3 days** |
| Size | 56 MB | 26 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [ming tung chen](https://appshunter.io/developer/1885509669) | [Chia-Yu Huang](https://appshunter.io/developer/6779987090) |

## What reviewers say

### 潮汐表 Pro

[App page](https://appshunter.io/ios/app/pro/id6761328495)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 專業版 (Pro) - 月費 | $1.99 | per month |
| 專業版 (Pro) - 年費 | $17.99 | per year |


### SwellLab

[App page](https://appshunter.io/ios/app/swelllab/id6779987088)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SwellLab Pro Monthly | $2.99 | per month |
| SwellLab Pro Annual | $29.99 | per year |


## Frequently asked questions

### Is 潮汐表 Pro free?

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

### Is SwellLab free?

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

### Do 潮汐表 Pro or SwellLab have ads?

Neither 潮汐表 Pro nor SwellLab shows ads.

### Which is updated more often, 潮汐表 Pro or SwellLab?

潮汐表 Pro ships an update every 7 months, and SwellLab every 3 days. Most recently, 潮汐表 Pro was updated on October 16, 2026 and SwellLab on October 16, 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.*