No — this alarm runs in your browser tab, so the tab needs to stay open (it can be in the background or another window) for it to ring at the right time. Closing the tab or browser stops it.

Yes — add as many as you need, each with its own time, label and repeat days. They're listed together and you can toggle each on or off individually.

An alarm with no repeat days selected turns itself off after it fires once. Alarms with repeat days stay enabled and will ring again on their next matching day.

Yes — alarms are saved in this browser's local storage, so they'll still be there next time you open this page in the same browser. They won't follow you to a different browser or device.

When an alarm rings, choose a snooze length and it'll ring again after that many minutes. Snoozing doesn't change the original alarm's schedule for future days.