Mulu ("we", "our", or "the app") is a journaling app designed to help you build a daily writing habit. Your privacy matters to us. This policy explains what data we collect, how we use it, and your rights.
1. Data Stored on Your Device
Mulu stores the following data locally on your iPhone using Apple's on-device storage:
Journal entries (text, mood ratings, word counts)
Your profile information (name, age range, gender, birthday month/day)
App settings (journal time, writing length, snooze duration)
Streak and usage statistics
Signature image (if provided during onboarding)
This data never leaves your device unless you explicitly choose to export it, or unless AI-powered prompts are enabled (see Section 3).
2. Screen Time API
Mulu uses Apple's Screen Time API (FamilyControls and DeviceActivity frameworks) to temporarily restrict access to apps you select until you complete your daily journal entry. The list of apps you choose to block is stored locally on your device and is not accessible to us or any third party. Apple processes this data under its own privacy policies.
3. AI-Powered Prompts
When AI prompts are enabled, Mulu sends limited context (such as your mood rating and selected journaling topic) to Anthropic's Claude API to generate personalized writing prompts. No journal entry text is sent to the API. Anthropic processes this data under its own privacy policy (https://www.anthropic.com/privacy).
4. Subscriptions and Payments
Mulu offers auto-renewable subscriptions managed through Apple's App Store. Payment processing is handled entirely by Apple. We use RevenueCat, a third-party service, to manage subscription status and entitlements. RevenueCat receives an anonymous app user ID and subscription status but does not have access to your journal content or personal data. For more information, see RevenueCat's privacy policy (https://www.revenuecat.com/privacy).
5. Analytics
We may use PostHog, a privacy-focused analytics platform, to collect anonymous usage data such as screen views, feature usage, and onboarding completion rates. This data is aggregated and cannot be used to identify you personally. No journal content or personal information is included in analytics.
6. Data We Do NOT Collect
We do not require an account or login
We do not collect your email address
We do not sell or share personal data with advertisers
We do not track your location
We do not access your contacts, photos, or other personal files
7. Data Export and Deletion
You can export your journal entries from the app at any time. To delete all your data, simply delete the Mulu app from your device — all locally stored data will be permanently removed.
8. Children's Privacy
Mulu is not directed at children under 13. We do not knowingly collect data from children under 13.
9. Changes to This Policy
We may update this privacy policy from time to time. The latest version will always be available at this URL with the updated date above.
10. Contact
If you have questions about this privacy policy, contact us at: support@mulujournal.app