Privacy policy

Last updated 14 September 2026

Sipper is a phone app for macOS made by Ben Hybert. This policy covers the Sipper app, the Sipper browser extension and this website, sipper.dev.

The short version

Sipper doesn't collect personal data. There is no Sipper account, and the app contains no analytics, advertising or tracking code. Your SIP details, contacts, call history and recordings are never sent to the developer.

What the app stores on your Mac

• Your SIP accounts, profiles, contacts, call history and settings, saved as files in Sipper's folder on your Mac.
• Your SIP passwords, saved in the macOS Keychain.
• Call recordings, if you make any, saved in the folder you choose in Settings › Recording.
• A log of recent SIP activity for troubleshooting, kept in memory while Sipper is open. It's only written to a file if you choose Save in Settings › Diagnostics.

You can delete accounts, contacts, history and recordings in the app at any time. Deleting an account also removes its password from the Keychain.

Who the app connects to

• The SIP servers of the accounts you add, to register them, make and receive calls, and check for voicemail.
• For call audio, your provider's media servers or, when a call is set up that way, the other party's phone directly.
• A STUN server, only if you enter one.

These servers belong to your phone provider or organisation. Their own privacy policies cover the calls and call records they keep.

iCloud sync

The version of Sipper you download from this site doesn't include iCloud sync. If you build Sipper yourself with iCloud enabled and turn sync on, your profiles, accounts and contacts, plus your call history if you include it, are stored in Sipper's private container in your iCloud account, and your SIP passwords are synced by iCloud Keychain. Apple holds that data under its own terms; the developer can't access it. Recordings and settings specific to each Mac are never synced.

Microphone and notifications

Sipper uses the microphone only so the other side of a call can hear you. If you allow notifications, it uses them for incoming and missed calls. You can change both in System Settings.

Recording calls

Recording laws differ between countries, and many require you to tell the other person that a call is being recorded. You are responsible for following the law where you and the people you call are.

The browser extension

• It runs only when you click its toolbar button, and reads only the tab that's open at the time.
• On a FusionPBX extensions list, it opens the pages of the extensions you tick, on the same site, using the login you already have.
• It passes account details to the Sipper app on your Mac and nowhere else.
• It remembers the last server, port and transport you chose for each phone system, in your browser's local storage. It doesn't store passwords.

This website

sipper.dev uses no cookies, analytics, third-party scripts or web fonts. It's hosted on Cloudflare, which processes technical information such as IP addresses to deliver the site and protect it from abuse, as described in Cloudflare's privacy policy. Sipper downloads and the source code are served by GitHub, under the GitHub General Privacy Statement.

If you ask for support

Support is handled through GitHub issues, which are public. Do not include passwords, account exports, private server addresses or unredacted call logs. GitHub handles your issue and account information under its own privacy policy.

Changes to this policy

If this policy changes, the new version will be posted on this page with a new date.

Contact

Ben Hybert
Sipper support on GitHub