# Privacy Policy

**Effective Date:** May 20, 2026  
**App:** free basic period tracker: no ads (Period)

## Overview

This period tracking app respects your privacy completely. All your data stays on your device. We don't collect, store, transmit, or have access to any of your personal information.

## Data Collection

**What we collect:**
- Period start dates, end dates, and ovulation dates (stored locally on your device only)
- User preferences (theme selection, language, notification settings)
- Device locale for language detection

**What we DO NOT collect:**
- Your name, email, phone number, or any contact information
- Location data or GPS coordinates
- Device identifiers, advertising IDs, or hardware information
- Usage analytics, telemetry, or crash reporting
- Biometric data (we only store dates you explicitly enter)
- Browsing history or app usage patterns

## Data Storage

All data is stored exclusively on your device using encrypted local storage. 

**No data is transmitted to:**
- Our servers
- Cloud services
- Third-party analytics providers
- Advertising networks
- Data brokers

## Your Rights

- **Export your data:** Use the app's export feature to download all your data as JSON
- **Delete your data:** Uninstalling the app removes all data from your device
- **No tracking:** We don't track you across apps, websites, or devices
- **No selling:** We never sell or share your data

## Permissions

The app requests these optional Android permissions:

- **POST_NOTIFICATIONS (Android 13+):** To send optional period reminders
  - You can disable this in Android Settings at any time
  - The app functions fully without notifications enabled

## Third-Party Libraries

This app uses open-source libraries for UI and functionality:
- `react-native-calendars` — calendar interface
- `expo-notifications` — local notification scheduling (no server communication)
- `expo-mail-composer` — opens your device's mail app
- `react-native-android-widget` — home screen widget display

None of these libraries collect your data.

## Email Export Feature

The "scheduled email export" feature works as follows:
- The app schedules a local reminder notification
- You tap the notification when it arrives
- This opens a draft in your installed mail app (Gmail, Outlook, Samsung Mail, etc.)
- The JSON data is attached to the draft
- **You manually tap "Send"** — the app never sends anything automatically
- Your mail app handles sending through your configured email account
- **Data only leaves your device when you choose to send it**

## Changes to This Policy

We may update this policy occasionally. The "Effective Date" above will reflect any changes.

## Contact

Questions about this privacy policy?  
Email: knoppninchen@gmail.com

---

## Technical Notes for Developers

- **No backend infrastructure** — this app requires zero server-side components
- **Works offline** — all features function without internet after initial install
- **Local-first design** — AsyncStorage is the only data store
- **Open source components** — built with open-source libraries
- **No API integrations** — no external service dependencies

This app is designed with privacy as the primary feature, not an afterthought.