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Privacy Policy for Chrona

Last Updated: April 9, 2026

Introduction

This Privacy Policy explains how Chrona (“we”, “us”, or “our”) collects, uses, and shares information when you use our mobile application (the “App”). We aim to keep data collection limited, process camera-based push-up detection locally on your device, and avoid linking app data to your real-world identity unless necessary for a specific lawful purpose.

Information We Collect

1. Information You Provide or Generate in the App

Depending on how you use the App, we may collect or process:

We do not require your real name to use the App, and we do not intend to identify you personally from routine app usage data.

2. Camera and Push-Up Detection

Chrona uses your device camera to detect push-ups. This processing is designed to occur locally on your device.

3. Information Collected Automatically

We may automatically collect limited technical and usage information, such as:

4. Information Stored Locally on Your Device

Some App data may be stored locally on your device, including:

Locally stored data may remain on your device until you delete it, reset the App, or uninstall the App.

How We Use Information

We use information we collect to:

Third-Party Services

We use the following third-party services:

RevenueCat

Sentry

TikTok SDK

Apple App Store / Google Play Store

We do not sell your personal data. We may share limited data with these providers so they can perform services on our behalf or support app distribution, subscriptions, diagnostics, and attribution.

Depending on your location, our legal bases may include:

Data Retention

We retain data only for as long as reasonably necessary for the purposes described in this Privacy Policy, including to operate the App, comply with legal obligations, resolve disputes, and enforce our agreements.

In practice:

Data Security

We use reasonable technical and organizational measures to protect information, including encrypted transmission where applicable and access controls for service providers and systems we use. No method of electronic storage or transmission is completely secure, so we cannot guarantee absolute security.

International Processing

We operate from Switzerland and may rely on service providers located in other countries. Where applicable, we take steps intended to protect data transferred internationally in accordance with applicable law.

Your Rights

Depending on where you live, you may have rights to:

To exercise these rights, contact us using the details below. We may need enough information to verify your request.

Tracking Choices

Children’s Privacy

The App is not intended for children under 13 years of age, or the applicable age of digital consent in your jurisdiction. We do not knowingly collect personal data from children. If you believe a child has provided us personal data, contact us and we will review the request.

Changes to This Privacy Policy

We may update this Privacy Policy from time to time. If we make material changes, we may notify you by updating the policy in the App or on our website and by changing the “Last Updated” date. Your continued use of the App after the updated policy takes effect means you accept the revised Privacy Policy, to the extent permitted by law.

European Users

If you are in the European Economic Area, Switzerland, or the United Kingdom, you may have additional rights under applicable data protection laws, including the GDPR or similar laws. You also have the right to lodge a complaint with your local supervisory authority.

For users in France, the supervisory authority is:

CNIL (Commission Nationale de l’Informatique et des Libertés)

Contact Us

If you have any questions or requests about this Privacy Policy or our data practices, contact us at:

By using Chrona, you acknowledge that you have read and understood this Privacy Policy.