Last updated: June 14, 2026
1. Our Core Principle
CaffeineCheck is built on a privacy-first architecture. All calculations, data storage, and tool interactions happen entirely within your web browser. We do not collect, store, or transmit any of your personal data, caffeine logs, or usage patterns to our servers.
2. What Data We Do Not Collect
- We do not collect your name, email, or any personal identifiers.
- We do not collect your caffeine intake data, sleep patterns, or any health information.
- We do not use cookies for tracking or analytics.
- We do not share data with third parties.
3. Local Storage
Our tools use browser localStorage to save your calculations and preferences on your own device. This data:
- Never leaves your device
- Cannot be accessed by our servers
- Can be cleared at any time through your browser settings
- Is not backed up or synchronized across devices
4. Advertising
We may display advertisements through Google AdSense and affiliate networks. These third-party services may use cookies or similar technologies to serve relevant ads. You can manage ad preferences through your Google Ad Settings.
5. Analytics
We do not use Google Analytics or any other visitor tracking service. We have no visibility into who visits our site, how long they stay, or what tools they use.
6. Contact
For privacy-related questions, email privacy@caffeinecheck.org.