Privacy Policy

The ZYKL app does not collect or send any personal information or usage data to us. In particular:

• No accounts. There is no sign-up, username, password or email address in the app.
• No analytics. No Google Analytics, Firebase Analytics or any other analytics or crash-reporting SDK.
• No ads or ad tracking. No advertising networks and no use of the advertising ID.
• No location, camera, microphone or contacts. The app never asks for these permissions.

Your focus sessions, tasks, settings and chosen dial edition are saved in a local database inside ZYKL's private storage on your phone. Other apps cannot read it, and we never upload it to any server. We have no way to see it.

If Android's own backup feature is turned on for your device, Android may include this app data in your personal Google backup. That backup is handled by Google under your device settings, not by us. State that only makes sense on one phone (a running timer, lockdown's Do Not Disturb setting, which permissions were already asked) is left out of it.

You can also export your history yourself, as a spreadsheet (CSV) or a backup file, through Android's file picker. The file goes where you choose; ZYKL does not send it anywhere.

Studio PRO is bought through Google Play Billing. Google processes the payment; we never see your card or payment details. Google tells the app only whether the purchase is valid so it can unlock the extra content. Google's own privacy policy applies to the payment.

Once, after your tenth completed focus cycle, ZYKL asks Google Play to show its rating card. You can rate, write a review or simply close it, and the app does not ask again. Your rating and review go to Google Play under your Google account; the app never sees them, and Google may decide not to show the card at all.

The only time information reaches us is when you choose to send it. When you use the contact form on zykl.app, we receive:

• the type of message you picked (bug, idea or sound request) and the note you wrote;
• your email address, only if you enter one;
• the time you sent it, a reference number, and your browser's user-agent string (browser and operating system version), which helps us reproduce bugs.

The form sends this to a private Google Sheet through Google Apps Script, and we may receive an email notification with the same content. Only the developer can access it. We use it to reply to you and to improve ZYKL, never for marketing, and we do not sell or share it. We keep messages for up to 24 months, or delete them sooner if you ask.

If the form cannot reach our server, your note is saved only in your own browser's local storage so it isn't lost. Emails you send to support@zykl.app are handled the same way as form messages.

zykl.app uses no cookies, no analytics and no advertising. Your browser's local storage remembers a few preferences on your own device: light or dark theme, sound on or off, volume and last soundscape, and any tasks you type into the in-browser focus mode. None of it is sent to us. Fonts are served from our own site. Like any website, our hosting provider may keep short-lived server logs (such as IP address and browser type) to keep the site secure and running.

ZYKL asks only for what a timer and sound player need:

• Notifications, to show the running timer and tell you when a session ends.
• Foreground service (media playback), so the timer and soundscapes keep running with the screen off.
• Exact alarms, so the end of a session is announced on time.
• Vibration, for the small haptic clicks when you turn the dial.
• Google Play Billing, only to check a Studio PRO purchase.

The soundscapes are recordings stored inside the app and played on your phone. ZYKL does not use the microphone and never records or analyzes sound around you.

• Reset your history from the app's settings at any time.
• Erase everything with Settings → Apps → ZYKL → Storage → Clear data, or simply uninstall the app.
• To have a message you sent us deleted, email support@zykl.app and we will remove it.

ZYKL is not directed at children under 13 and we do not knowingly collect information from them. If a child has sent us a message through the form, contact us and we will delete it.

If how ZYKL handles data changes, we will update this page and the date at the top. Significant changes will also be mentioned in the changelog.