# Period Tracker vs Tide 潮汐

The clearest difference is price: Tide 潮汐 at Free against Period Tracker's $2.99. Tide 潮汐 also leads on update cadence (every 2 days vs monthly). Period Tracker's advantage is in-app purchases (none vs 2) and iOS requirement (13.0 vs 15.0). On ads and device support there is nothing between them.

Tide 潮汐 is free to download; Period Tracker costs $2.99 up front. Tide 潮汐 sells 2 in-app purchases, starting at $2.99 per month. Period Tracker asks for nothing beyond the download.

Period Tracker ships an update monthly, Tide 潮汐 every 2 days. The most recent releases landed on September 22, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | Period Tracker | Tide 潮汐 |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/period-tracker-p-forest/id6756487934/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 2 days** |
| Monetization | Paid | — |
| Size | 52 MB | 21 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Chuang Yi Ting](https://appshunter.io/developer/1858853364) | [PEIYU Hsu](https://appshunter.io/developer/6792494874) |

## What reviewers say

### Period Tracker

[App page](https://appshunter.io/ios/app/period-tracker-p-forest/id6756487934)

This app helps users track their menstrual cycles with a unique pixel forest visualization that grows with each cycle. It offers simplified logging, pregnancy mode, and personalized themes, prioritizing user privacy with on-device data storage.

**Highlights:** Living pixel forest visualization, Smart cycle tracking, Pregnancy mode, Simplified logging, Passcode lock for privacy, Personalized themes

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

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is Period Tracker free?

Period Tracker costs $2.99, with no in-app purchases.

### Is Tide 潮汐 free?

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

### Do Period Tracker or Tide 潮汐 have ads?

Neither Period Tracker nor Tide 潮汐 shows ads.

### Which is updated more often, Period Tracker or Tide 潮汐?

Period Tracker ships an update monthly, and Tide 潮汐 every 2 days. Most recently, Period Tracker was updated on September 22, 2026 and Tide 潮汐 on September 11, 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.*