Clock master
Clock Master is a modern, privacy-first Progressive Web App engineered for high-precision timekeeping. Features background-reliable Web Audio alarms, a full-screen digital clock, Pomodoro timer with ambient soundscapes, meeting planner, and solar tracker—100% offline ready with zero tracking.
Clock master runs in a browser tab and does not declare a manifest, so it cannot be added to the home screen. Here is what installable means and how it works on the apps that support it.
Own Clock master? Have us re-run this measurement — we open it in a real browser, cut the network, and send you what survived.
How to install Clock master as a PWA
Screenshots
Are you the maker of Clock master? Claim this listing →
More in Utilities
Hosted NTRIP caster for RTK base stations. Stream centimeter corrections from your GNSS base to rovers and crews, forward to networks like Onocoy, download RINEX for post-processing, and watch live health — satellites, uptime, position checks. Free for one base station.
Share files up to 10GB with end-to-end encryption. Files are never stored permanently — they vanish after download or 24 hours. No account, no tracking. Faster than WeTransfer.
Open-source password manager — the best LastPass alternative. End-to-end encrypted vault, browser extension, cross-device sync. Free for personal use, self-hostable. Vaults stay readable offline once the app is installed, so a lost connection never locks you out of your own passwords.
Check if a food product is vegan by scanning its barcode or searching by ingredient. Open-source, offline-capable. Built for people who want to verify product contents quickly.
Convert between 500+ file formats in your browser. Documents, images, audio, video, ebooks — fast client-side conversion that doesn't upload your files to a server. Conversion runs client-side, so a confidential document is never uploaded anywhere to change format.
Scan QR codes and barcodes using your device camera. Works offline, no app download needed. Faster than downloading a native app — just open in browser and scan.