Privacy Policy

Effective 1 November 2026 · Last updated 17 October 2026

CordOS is a guitar app for iPhone and Android made by Abdallah Zakaria ("we", "us"). This policy explains what information the app handles, why, and the choices you have. We keep it short because the app keeps things simple: no ads, no tracking, and nothing sold to anyone.

What we collect

• Account. If you create an account we store your email address and a securely hashed password so you can sign in. Accounts are provided through Google Firebase Authentication.
• Your gear and settings. The guitars, pedals and amps you add, your rigs, your saved progressions and your app preferences. We store these so they are there when you sign in again on any device.
• Microphone audio for the tuner. The tuner listens through the microphone only while the tuner screen is open. The audio is analysed on your device to detect pitch. It is never recorded, stored or sent to us or anyone else.

What we do not collect

• We do not use analytics, advertising or tracking tools in the app.
• We do not record your playing.
• We do not access your contacts, location, photos or files.
• We do not sell or share your information with advertisers or data brokers.

Where your data is stored

Account and saved data are stored with Google Firebase (Google Cloud) in the United States. Google processes this data on our behalf under its own terms and security standards. Data is encrypted in transit.

Using CordOS without an account

You can explore the app without an account. An account is used to save your gear, rigs and progressions and to keep them in sync. If a feature needs an account, the app will say so when you reach it.

Your choices

• Delete your account. Email privacy@cordos.app from the address on the account and we will permanently delete the account and everything saved with it within 30 days. When in-app deletion is available you will find it under Settings → Account.
• Microphone. You can revoke microphone access at any time in your phone's settings. The tuner will then not work until access is restored; the rest of the app is unaffected.
• Your data. You can ask for a copy of the data held on your account by emailing privacy@cordos.app.

Children

CordOS is not directed at children under 13 and we do not knowingly collect personal information from them. If you believe a child has created an account, email us and we will remove it.

Changes to this policy

If this policy changes we will update the dates above. For material changes we will tell you in the app before they take effect.

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