# Ovulation Calculator & Cycle vs Tide 潮汐

The clearest difference is in-app purchases: Ovulation Calculator & Cycle at none against Tide 潮汐's 2. Tide 潮汐's advantage is update cadence (every 2 days vs every 4 months) 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. Ovulation Calculator & Cycle asks for nothing beyond the download.

Ovulation Calculator & Cycle ships an update every 4 months, Tide 潮汐 every 2 days. The most recent releases landed on October 15, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Ovulation Calculator & Cycle | Tide 潮汐 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 days** |
| Size | 4 MB | 21 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [LEAN ASIA CO., LTD](https://appshunter.io/developer/1815050814) | [PEIYU Hsu](https://appshunter.io/developer/6792494874) |

## What reviewers say

### Ovulation Calculator & Cycle

[App page](https://appshunter.io/ios/app/ovulation-calculator-and-cycle/id6772260524)

**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 Ovulation Calculator & Cycle free?

Ovulation Calculator & Cycle 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 Ovulation Calculator & Cycle or Tide 潮汐 have ads?

Neither Ovulation Calculator & Cycle nor Tide 潮汐 shows ads.

### Which is updated more often, Ovulation Calculator & Cycle or Tide 潮汐?

Ovulation Calculator & Cycle ships an update every 4 months, and Tide 潮汐 every 2 days. Most recently, Ovulation Calculator & Cycle was updated on October 15, 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.*