Privacy Policy

Wrenwhistle · Zydeno · 19 October 2026

Wrenwhistle: Stopwatch, Timer & Alarm ("Wrenwhistle", "the extension") is published by Zydeno. Contact: [email protected]. Effective date: 19 October 2026.

In short

The extension stores data only in your browser (storage.local); nothing is sent to Zydeno or anyone else; no analytics.

Wrenwhistle has no account, no server, no telemetry, no advertising and no remote code. It makes no network requests. It does not read, change or watch the websites you visit.

What is stored in your browser

Timers (name, colour, length, end time, repeat setting), the stopwatch (session name, times, laps and the clock time of each lap), the last 30 stopwatch sessions, presets, alarms (time, name, weekdays, sound), settings (theme, language, clock format, sound, volume, ring length, snooze length, badge, notifications, ring window) and, if you add one, your own alarm sound file (up to 1 MB).

This data stays in the extension storage of this browser profile. Removing the extension normally deletes it. You can delete single items, the stopwatch history or your own sound at any time in the extension.

Permissions and why they are needed

alarms: wakes the extension at the moment a timer ends or an alarm is due, also when the popup is closed.

notifications: shows a system notification with the timer or alarm name when time is up, or when an alarm was missed.

storage: keeps your timers, stopwatch, presets, alarms, history, settings and own sound in storage.local.

offscreen (Opera package only): plays the alarm sound from a hidden extension page, because the background of Chromium-based browsers cannot play audio itself. The Firefox package does not request it.

The extension requests no access to websites, tabs, browsing history, downloads or the clipboard beyond what you start yourself.

Files you choose

Export creates a JSON file on your computer with presets, alarms, history, settings and your own sound. You decide where it is saved and who gets it. Import reads a file you choose, checks it fully before anything is replaced, shows a summary and asks for confirmation; Cancel changes nothing. CSV export of laps and Copy work only when you click them.

Children

The extension collects no personal data from anyone, including children.

Links

Links to zydeno.com, the support e-mail address or the store page open only when you click them; the privacy policy of that site then applies. This policy covers the extension only.

Changes

If this policy changes, the new version is published at the same address with a new effective date. Questions or deletion guidance: [email protected].