# FastFox vs Cyca

The clearest difference is ads: Cyca at none against FastFox's shown. Cyca also leads on update cadence (weekly vs every 2 months). FastFox's advantage is iOS requirement (15.0 vs 17.0). On price, in-app purchases and device support there is nothing between them.

Both are free to download. FastFox sells 1 one-off in-app purchase and Cyca sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

FastFox ships an update every 2 months, Cyca weekly. The most recent releases landed on October 25, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | FastFox | Cyca |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.7 (3 ratings)](https://appshunter.io/ios/app/cyca-period-and-cycle-tracker/id6782251621/reviews)** |
| Number of ratings | — | **3** |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Weekly** |
| Monetization | — | Free with in-app purchases |
| Size | 51 MB | 6 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 12+ | 4+ |
| Developer | [MyQuietSpot Inc.](https://appshunter.io/developer/1841316087) | [Guan Feng Lai](https://appshunter.io/developer/1136144960) |

## What reviewers say

### FastFox

[App page](https://appshunter.io/ios/app/fastfox-intermittent-fasting/id6761245094)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| FastFox Pro | $14.99 | one-time |


### Cyca

[App page](https://appshunter.io/ios/app/cyca-period-and-cycle-tracker/id6782251621)

This app helps you track your menstrual cycle, predict your period, fertile window, and ovulation day. It offers a daily body forecast for energy, mood, and skin, and allows for quick logging of symptoms. Your data stays private and offline on your device.

**Highlights:** Period and cycle tracking, Fertile window and ovulation prediction, Daily body forecast (energy, mood, skin), Quick symptom logging, Private and offline data storage, Period and PMS reminders, Smart planner for best/gentlest days

**Features:** macOS Compatibility, Family Sharing, Apple Watch app, Vision Pro support, iPhone Duo support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Cyca Pro | $4.99 | one-time |


## Frequently asked questions

### Is FastFox free?

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

### Is Cyca free?

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

### Do FastFox or Cyca have ads?

FastFox shows ads; Cyca does not.

### Which is updated more often, FastFox or Cyca?

FastFox ships an update every 2 months, and Cyca weekly. Most recently, FastFox was updated on October 25, 2026 and Cyca on November 5, 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.*