Last updated: 23 March 2026
Mellem is a meditation app for macOS that helps you find calm moments in your workday. We designed it with privacy at the core. Your meditation history stays on your device, we never record your audio, and we only collect what we need to run the service.
Account information. When you sign in with Google or a magic link, we store your email address and a unique account identifier. This is held in our database (hosted by Supabase) and used to manage your account and subscription.
Subscription and billing. If you subscribe, payment is handled entirely by Stripe. We never see or store your card details. We do store your Stripe customer ID, subscription status, plan type, and billing period dates so the app knows whether your subscription is active.
What we collect. We collect anonymous usage events in the desktop app (app opens, feature usage, meditation session metadata like duration and mood category) and device info (OS, app version, architecture). On the website, we collect page views, clicks, scroll depth, and session recordings of browsing behaviour.
What we do NOT collect. We never collect calendar event titles or content, meeting participants, audio or voice data, microphone recordings, or any content from your meetings or meditations.
Why we collect it. To understand how people use Mellem so we can improve the product, identify bugs, and measure which features are valuable.
Who processes it. Analytics data is processed by PostHog. Data is hosted in the EU. PostHog privacy policy.
Identity linking. When you create an account, anonymous usage data is linked to your account to provide a continuous view of your experience. On sign-out, a new anonymous identifier is generated.
Cookieless website analytics. The mellem.work website does not use cookies or local storage for analytics. PostHog is configured in cookieless mode, meaning no data persists on your device between visits and no cross-session tracking occurs. All website analytics data is anonymous and aggregate.
Retention. Analytics event data is retained in PostHog for 12 months, after which it is automatically deleted.
Opt-out. In the desktop app, you can disable analytics at any time via the "Share usage data" toggle in Settings.
The desktop app uses Sentry to collect crash reports and error data. When something goes wrong, Sentry receives a report that includes the error details (stack trace), your app version, operating system, and your account identifier (if signed in). This helps us identify and fix bugs quickly.
Error reports are sent automatically and cannot currently be disabled separately from app usage. No calendar data, meditation content, or meeting information is included in error reports.
Sentry data is processed and stored in the EU (Germany). Sentry privacy policy.
The following data is stored locally on your Mac and never sent to our servers:
If you choose to connect your Google Calendar, Mellem requests read-only access to your calendar events. It uses this to:
Calendar data is fetched periodically, processed locally in memory, and never stored permanently or sent to any third party. You can disconnect your calendar at any time from the account screen, which immediately deletes all stored tokens.
If you choose to connect your Apple Calendar, Mellem requests access through the native macOS EventKit framework. It uses the same information as described above for Google Calendar: event start and end times, to detect gaps and time meditation suggestions around your meetings.
Apple Calendar data is processed locally in memory and never stored permanently or sent to any third party. You can revoke access at any time from macOS System Settings or from the account screen in Mellem.
Mellem can detect whether your microphone is currently in use. This is the same indicator macOS shows as the orange privacy dot in your menu bar. It uses this to know when you're on a call, so it doesn't interrupt you mid-meeting.
No audio is ever recorded, captured, or transmitted. The app only checks a binary active/inactive status from the macOS audio system. It requires a one-time microphone permission prompt from macOS, but this permission is used solely to query the microphone's in-use state.
We do not use any advertising or ad-tracking services.
We take the security of your data seriously and implement appropriate technical and organisational measures to protect it:
Your account data (email, subscription status) is retained for as long as you have an account. If you sign out, your local session is cleared immediately. Local data (meditation history, preferences) remains on your device until you delete the app or its data.
You can:
If you're in the EU or UK, you have additional rights under GDPR including the right to access, rectify, and erase your personal data. Contact us to exercise these rights.
Mellem is not directed at children under 16. We do not knowingly collect personal data from children.
We may update this policy from time to time. If we make significant changes, we'll let you know through the app or by email. The date at the top of this page always reflects the latest version.
Questions about this policy? Reach us at hello@mellem.work.