# Tide 潮汐 vs Cycle Diary

The clearest difference is in-app purchases: Cycle Diary at none against Tide 潮汐's 2. Tide 潮汐's advantage is update cadence (every 2 days vs every 8 days) and iOS requirement (15.0 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. Tide 潮汐 sells 2 in-app purchases, starting at $2.99 per month. Cycle Diary asks for nothing beyond the download.

Tide 潮汐 ships an update every 2 days, Cycle Diary every 8 days. The most recent releases landed on September 30, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Tide 潮汐 | Cycle Diary |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 days** | Every 8 days |
| Size | 21 MB | 5 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 17+ | 12+ |
| Developer | [PEIYU Hsu](https://appshunter.io/developer/6792494874) | [Adnan Adnan](https://appshunter.io/developer/6804409994) |

## What reviewers say

### Tide 潮汐

[App page](https://appshunter.io/ios/app/tide/id6792494872)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 潮汐 Plus | $2.99 | per month |
| 潮汐 Plus | $19.99 | per year |


### Cycle Diary

[App page](https://appshunter.io/ios/app/cycle-diary-period-tracker/id6804409992)

**In-app purchases:** none


## Frequently asked questions

### Is Tide 潮汐 free?

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

### Is Cycle Diary free?

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

### Do Tide 潮汐 or Cycle Diary have ads?

Neither Tide 潮汐 nor Cycle Diary shows ads.

### Which is updated more often, Tide 潮汐 or Cycle Diary?

Tide 潮汐 ships an update every 2 days, and Cycle Diary every 8 days. Most recently, Tide 潮汐 was updated on September 30, 2026 and Cycle Diary on October 3, 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.*