# Privacy policy > What Lagless and lagless.app collect, which is nothing, plus what the app changes on your Mac, how email is handled, and your rights under UK GDPR. Updated 2026-10-06. Canonical page: https://lagless.app/privacy > **Short version.** The Lagless app collects nothing and makes no network requests. This website uses cookieless, self-hosted analytics that never store your IP address, asks for your email address before you download the app, and records each download so we can count real downloads. ## 1. Who we are Lagless is an independent, free and open-source app made by Charles Reiss, who is the controller for any personal data described here. Contact: [hello@lagless.app](mailto:hello@lagless.app). ## 2. The Lagless app The app does not collect, store or send any personal data. It has no account, no analytics, no crash reporter and no update check, and it makes no network requests. On your Mac it reads and writes the following: - **One AirPlay setting.** Through its helper, Lagless writes `audioLatencyMs` in the `com.apple.airplay` preferences of the system administrator account (`/var/root/Library/Preferences`). The helper accepts only whole numbers from 350 to 2000. Turning Lagless off removes the setting, and deletes that preferences file if nothing else is in it. - **Restarting AirPlay.** After a change, the helper restarts the macOS AirPlay process (`AirPlayXPCHelper`) so the new value takes effect. - **Its own preferences.** These are the delay you chose for each AirPlay output, the delay each output reported, whether Keep Speaker Awake is on and whether you have finished setup. The data is keyed by the identifier macOS gives each output and stays on your Mac. - **A helper and an optional login item.** These are registered with macOS after you approve them. Lagless reads which audio output is selected and the delay it reports, so it can show you before and after. It does not use your microphone, camera, files, contacts, location or screen. Keep Speaker Awake plays noise at −78 dBFS to the AirPlay output only. It never records anything. ## 3. This website lagless.app sets no cookies and shows no ads. It uses no third-party analytics, fonts or scripts. Everything below is handled by us on Cloudflare. **Page visits.** When a page loads, a small script records: - the page and the site you came from - campaign tags in the link, if any - your approximate country and city, and your network provider - your device type, browser and operating system Your IP address is not stored. To count unique visitors without cookies, we combine your IP address and browser details with a random value that changes every day and keep only the resulting code. Once that day's value is discarded, the code can't be traced back to you or linked across days. **Your email when you download.** To download Lagless you enter your email address. We store it with the time, your IP address and whether you ticked "Email me about updates". We use it to know who downloaded Lagless and, only if you ticked the box, to email you about updates. You can unsubscribe from those at any time, and ask us to delete your email whenever you like. **Downloads.** When you download Lagless, we record: - your IP address - your approximate location and network provider - your browser's user agent - the page you came from - the time We use this to count real downloads and filter out bots. We also get an email notification with the same details, including the email address you entered. **Why (lawful basis):** our legitimate interest in understanding how people find Lagless and in counting genuine downloads (UK GDPR Article 6(1)(f)). **Who processes it** (page visits, downloads and download emails): - **Cloudflare**, which hosts the site and stores these records for us. - **Resend**, which sends us the download notification email. Both act as our processors and may handle data outside the UK, under their standard data protection terms. **How long we keep it:** analytics and download records are kept for up to 24 months, then deleted. **“Ask AI” links** open the assistant you choose in a new tab. Nothing is sent to that assistant until you click, and from then on their privacy policy applies. Our hosting provider also handles the technical details any website receives, such as your IP address and browser type, in order to deliver pages and protect the service. ## 4. If you email us **What:** your email address, name if given, and what you write. **Why:** to reply to you. **Lawful basis:** our legitimate interest in answering messages people choose to send (UK GDPR Article 6(1)(f)). **Who sees it:** only us and our email provider, which processes it on our behalf. **How long:** until your question is resolved, then deleted within 12 months. If we need to keep it longer, for example for a legal claim, we keep it only as long as that requires. ## 5. Your rights Under UK GDPR you can ask to: - access the personal data we hold about you - correct it - delete it - restrict how we use it - object to how we use it - receive a copy you can take elsewhere Email [hello@lagless.app](mailto:hello@lagless.app). We'll reply within one month. If you're unhappy with how we've handled your data, you can complain to the UK Information Commissioner's Office: [ico.org.uk/make-a-complaint](https://ico.org.uk/make-a-complaint/), or 0303 123 1113. ## 6. Children Lagless doesn't knowingly collect data from anyone, including children. ## 7. Changes If this policy changes, we'll update the date at the top of this page. Because the app collects nothing, a change would mostly affect the website or how we handle email. ## 8. Removing everything from your Mac Open Lagless, choose **Uninstall Lagless…** and confirm. It restores Apple's AirPlay default, removes the helper, the login item and its own preferences, then quits. Drag Lagless to the Bin afterwards.