NFP Calendar - Support & Privacy

Frequently Asked Questions

How do I start a new cycle? Tap any day on the calendar and mark it as the start of your cycle, or let the app automatically detect it based on menstruation entries.

How do I export my chart as PDF? Go to the List tab, tap on a cycle, and select the PDF export option to share with your instructor or doctor.

Is my data private? Yes. All data is stored locally on your device or in your personal iCloud account. We do not have access to your data. See our Privacy Policy for details.

How do I enable iCloud sync? Go to Settings within the app and toggle "Sync with iCloud" on. Your data will sync across all your Apple devices signed into the same iCloud account.

Can I backup my data? Yes. Go to Settings and tap "Export Data" to save your data as a JSON file. You can import this file later to restore your data.

What NFP methods does the app support? The app is designed to work with mucus-based methods like Creighton Model and Billings Ovulation Method. It tracks all standard observations including mucus color, sensation, stretch, and peak days.

Privacy Policy

Last updated: September 16, 2026

            Summary: NFP Calendar does not collect, store, or transmit any of your personal data to us or third parties. Your data stays on your device.
        

Data Storage

All fertility tracking data you enter in NFP Calendar is stored:

Locally on your device using Apple's Core Data framework
In your personal iCloud account (optional) if you enable iCloud sync

We, as the developers, do not have access to any data stored on your device or in your iCloud account.

Data Collection

We do not collect:

Personal information (name, email, phone number)
Health or fertility data
Usage analytics or statistics
Device identifiers
Location data
Any other personal data

Third-Party Services

NFP Calendar does not integrate any third-party analytics, advertising, or tracking services. The app uses only:

Apple StoreKit – for in-app purchases (handled entirely by Apple)
Apple CloudKit/iCloud – for optional data sync (stored in your personal iCloud account)
Apple HealthKit – for optional Apple Health sync (written to your device's Health data, never read)

These are Apple's native frameworks, and any data processed through them is governed by Apple's Privacy Policy.

Apple Health

NFP Calendar can add what you chart to Apple Health on your device. It is off until you turn it on, and it is one-way: the app writes to Health and never reads anything from it.

When it is on, the app writes four kinds of entry — your menstrual flow, spotting, cervical mucus quality, and, only if you turn on a second separate switch, sexual activity. Apple asks your permission for these categories before anything is written, and you may allow some and deny others.

Nothing written to Apple Health is sent to us or to anyone else. It stays on your device, in your own Health data. You can turn the sync off at any time from the Apple Health screen in the app's Settings, and that screen also offers “Remove my data from Health” to delete what the app added. Data held in Apple Health is governed by Apple's Privacy Policy.

Data Export

You can export all your data at any time from the Settings screen. The exported JSON file is saved to a location of your choice and is not transmitted to us.

Data Deletion

You can delete all your data at any time from Settings > "Delete All Data". This permanently removes all data from your device and iCloud (if sync is enabled).

Children's Privacy

Our app is not directed at children under 13. We do not knowingly collect any information from children.

Changes to This Policy

We may update this Privacy Policy from time to time. Any changes will be posted on this page with an updated revision date.

Contact Us

If you have any questions about this Privacy Policy, please contact us at:

esteban@cersem.dev