Before you rely on it

1. Switch the sound on. Browsers stay silent until the page has been tapped once. Tap anywhere, or press Enable sound in the yellow bar under the tabs.
2. Allow notifications. Press Allow notifications in the yellow bar so alarms can pop up when this tab is hidden or in the background.
3. Test it. Press Test alarm at the top right. It rings in 5 seconds, so you can check you can hear it on this device.
4. Keep the page open. Alarms only ring while this page is open. On a phone or tablet, keep the screen on.

When something rings

• An alert bar appears at the top of the page showing everything that's ringing, on both tabs.
• Press Snooze or Stop for each one. If both tabs are ringing you also get Snooze everything and Stop everything.
• On a keyboard, Space stops and S snoozes.
• A dot on the Alarm or Wing tab shows which one is ringing.

Look and sound

• The theme button cycles Dark → Night (deep red, easy on the eyes in a dark room) → Light. Both tabs change together.
• Sound settings, such as the alarm sound, snooze length, gradual wake-up and stopping automatically, are shared by both tabs. Change them on either one.

Add an alarm

1. Type a Label (optional), for example “Lockup”, and a Group (optional), for example “Ops”, to sort your alarms.
2. Type the time as 4 digits, for example 0730 or 1630, or use the clock button.
3. Tap the days it should repeat, or pick Every day, Weekdays, Weekends or Once.
4. Press Add alarm.

Quick timers

• Tap 5 min, 10 min, 15 min, 30 min or 1 hour.
• Or type minutes (for example 12) or hours:minutes (for example 1:30) and press Start.
• Running timers show under Timers. Use +1 min to add time or to cancel.

Your alarms

• The switch turns an alarm on or off without deleting it.
• Edit an alarm's time, label, days and group, and its own sound, volume and gradual wake-up.
• Move an alarm up or down, or press Sort by time.
• Delete an alarm. Undo appears at the bottom of the screen for 30 seconds.
• The group buttons above the list, such as All and Ops, show just that group.
• Each alarm shows how long until it next rings. The big line at the top shows the next one due.

Buttons at the top right

Load a saved list your supervisor has set up. Choose Replace to swap your alarms for the list, or Add to mine to add them to yours (exact copies are skipped). Undo works for both. The list's name then shows above your alarms.

Clear all alarms. Undo is available for 30 seconds. Running timers are kept.

Compact view fits more alarms on screen.

Theme: dark, night or light.

Settings: time format, sound, snooze, what happens when an alarm rings, and Import / Export to save your alarms to a file or load them back.

Keyboard shortcuts

Work out a changeover schedule

1. Times. Type the Unlock and Lockup times as 4 digits, for example 0745 and 1115.
2. Routine. Choose the Unit routine:
   • B – Sessions: wings in the same session unlock together. Sessions run in number order, Session 1 first.
   • C – 1 Wing: each wing unlocks on its own, starting from the top of the list.
   Then pick a 5 min or 10 min changeover.
3. Wings. Type each wing's name and count (number of prisoners). For Routine B, choose each wing's Session (1 to 20). + Add wing adds a row (up to 20), reorders, removes, and Reset puts back the standard wings.
4. Press Calculate.

Reading the results

• The time between unlock and lockup is split evenly between the sessions.
• Each session shows its time out, which wings are locked down with their total count, and its changeover time.
• An alarm is set for each changeover, and the line at the top counts down to the next one.
• After opening or reloading the page, press Calculate again so the alarms can sound.
• Print prints the schedule on white paper.

TOMS lockdown entries

• Copy TOMS lockdown entry under each session copies that session's entry, ready to paste into TOMS.
• Morning: from 0705 (0805 on Sundays) until the unlock time.
• Lunch: 1145 to 1245 (1115 to 1215 on Wednesdays).
• Afternoon: from 1245 (1215 on Wednesdays) until the time in the Unlock box, so type the afternoon unlock time there first.
• These use the total of the wing counts. The small line under each button shows what it will copy, or what's still missing.

Buttons at the top right

Load a saved wing setup: the routine, changeover, times and wings your supervisor has saved. Press Calculate afterwards.

Theme: dark, night or light.

Settings: alarms on or off, sound and volume, a pre-warning chime before each changeover, snooze, keeping the screen awake, and a warning before closing the page.