# Zero vs Period Tracker

Zero and Period Tracker are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Zero sells 3 in-app purchases, starting at $1.99 per month and Period Tracker sells 3 in-app purchases, starting at $2.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Zero ships an update every 3 weeks, Period Tracker every 2 weeks. The most recent releases landed on October 16, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Zero | Period Tracker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/zero-rush/id6753113382/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 2 weeks** |
| Monetization | Freemium | — |
| Size | 10 MB | 163 MB |
| Requires iOS | 18.5 | **18.0** |
| Devices | **iPhone, Apple Watch** | iPhone |
| Age rating | 4+ | 12+ |
| Developer | [Carlos Adiel Vega Lopez](https://appshunter.io/developer/1842567782) | [TraceWave](https://appshunter.io/developer/1782357742) |

## What reviewers say

### Zero

[App page](https://appshunter.io/ios/app/zero-rush/id6753113382)

This app helps you manage stress by combining guided breathing exercises with real-time biometric data from your Apple Watch. It provides insights into your stress patterns and helps you schedule recovery moments to build resilience.

**Highlights:** Guided breathing exercises, Real-time biometric tracking (RHR, HRV), Stress pattern analysis, Scheduled mindful breaks, Relaxation validation, Local data storage

**Features:** Apple Watch app

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| All Access – Monthly | $1.99 | per month |
| All Access – Yearly | $19.99 | per year |
| Lifetime All Access | $89.99 | one-time |


### Period Tracker

[App page](https://appshunter.io/ios/app/period-tracker-ovulation-cycle/id6774117828)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Weekly | $2.99 | per 7 days |
| Premium Monthly | $7.99 | per month |
| Premium Yearly | $99.99 | per year |


## Frequently asked questions

### Is Zero free?

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

### Is Period Tracker free?

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

### Do Zero or Period Tracker have ads?

Neither Zero nor Period Tracker shows ads.

### Which is updated more often, Zero or Period Tracker?

Zero ships an update every 3 weeks, and Period Tracker every 2 weeks. Most recently, Zero was updated on October 16, 2026 and Period Tracker on October 13, 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.*