Privacy Policy

Chords Weaver — Last updated: July 2026

1. Overview

Chords Weaver is a chord progression tool available on the web and as a native app (iOS, Android). This policy explains what data is collected and how it is used.

2. Data collected

• Anonymous analytics — We use PostHog (EU region) to measure aggregate usage (sessions, events, features used) across the web, mobile and desktop apps. No name or account is collected; a randomly generated, anonymous identifier stored locally on your device is used to count returning sessions. On the web, PostHog derives an approximate, city-level location from your IP address; in the mobile and desktop apps, IP-based location is disabled, so no location is attached.
• Local storage — App preferences (language, sound settings, progression history, custom chords) are stored locally on your device. Without an account, they are never transmitted to our servers.
• Optional account & cloud sync — Signing in is entirely optional. If you choose to create an account (email & password, Google, or Apple, via Firebase Authentication), your email address and the chord progressions you save are stored in Firebase (Google Cloud) so they sync across your devices. Signing out stops the sync, and you can delete your account and its stored progressions at any time from within the app. The app works fully without an account.
• Purchases — In-app purchases are handled by the Apple App Store or Google Play (native apps) or Stripe (web); validation uses RevenueCat. We do not store payment details. On the web only, if you use "restore purchase by email", your email address is sent to look up your Stripe purchase and is not stored afterwards.

3. Data not collected

We do not collect your name or precise location, we do not use advertising or cross-app tracking, and we never sell or share your data. We only collect your email address if you choose to create an account for cloud sync.

4. Third-party services

• Firebase (Google) — authentication and cloud storage for the optional account & progression sync — Firebase Privacy & Security
• PostHog — anonymous product analytics (EU-hosted) — PostHog Privacy Policy
• RevenueCat — handles in-app purchase validation — RevenueCat Privacy Policy
• Stripe — handles web payments (web only) — Stripe Privacy Policy

5. Children

Chords Weaver is not directed at children under 13. We do not knowingly collect data from children.

6. Changes

This policy may be updated occasionally. Changes will be reflected on this page with an updated date.

7. Contact

Questions? Contact us at loup.vuarnesson@pm.me