# Geon ThermoCycle PeriodTracker vs Tide 潮汐

The clearest difference is in-app purchases: Geon ThermoCycle PeriodTracker at none against Tide 潮汐's 2. Geon ThermoCycle PeriodTracker also leads on iOS requirement (13.0 vs 15.0). Tide 潮汐's advantage is update cadence (every 2 days vs fortnightly). 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. Geon ThermoCycle PeriodTracker asks for nothing beyond the download.

Geon ThermoCycle PeriodTracker ships an update fortnightly, Tide 潮汐 every 2 days. The most recent releases landed on October 11, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Geon ThermoCycle PeriodTracker | Tide 潮汐 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (2 ratings)](https://appshunter.io/ios/app/geon-thermocycle-periodtracker/id6742389232/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 2 days** |
| Monetization | Free | — |
| Size | 53 MB | 21 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 12+ | 17+ |
| Developer | [Geon Corporation](https://appshunter.io/developer/1798128736) | [PEIYU Hsu](https://appshunter.io/developer/6792494874) |

## What reviewers say

### Geon ThermoCycle PeriodTracker

[App page](https://appshunter.io/ios/app/geon-thermocycle-periodtracker/id6742389232)

This intuitive period tracking app helps women manage their menstrual cycles. It offers smart predictions for periods and ovulation, tracks body temperature via NFC, and displays health trends in easy-to-read charts. Your personal health data is kept private and secure.

**Highlights:** Smart period and ovulation prediction, NFC temperature transfer, Data analysis charts, Privacy and security protection, User-friendly interface

**Features:** macOS Compatibility

**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 Geon ThermoCycle PeriodTracker free?

Geon ThermoCycle PeriodTracker is free to download, with no in-app purchases.

### Is Tide 潮汐 free?

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

### Do Geon ThermoCycle PeriodTracker or Tide 潮汐 have ads?

Neither Geon ThermoCycle PeriodTracker nor Tide 潮汐 shows ads.

### Which is updated more often, Geon ThermoCycle PeriodTracker or Tide 潮汐?

Geon ThermoCycle PeriodTracker ships an update fortnightly, and Tide 潮汐 every 2 days. Most recently, Geon ThermoCycle PeriodTracker was updated on October 11, 2026 and Tide 潮汐 on October 25, 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.*