Privacy
FrequencyZen has no accounts, no sign-up and no database. All sound is generated on your device.
What your browser stores
Your last studio settings (sound type, frequencies, volume, noise, timer) are saved in your browser’s localStorage under keys starting with fz:, so the studio opens where you left it. They never leave your device.
Analytics
We use Ahrefs Web Analytics to count page views. It doesn’t use cookies and doesn’t build a profile of you.
AI session planner
If you use the planner, the text you type (up to 400 characters) is sent to our server and on to an AI model through Vercel AI Gateway to write a suggestion. We don’t store it or attach it to you. Please don’t include names or medical details you’d rather keep private.
Health note
Nothing on this site is medical advice. If you have a health condition, epilepsy, or concerns about your hearing, talk to a professional.