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. If the browser doesn't ask (Edge often doesn't), the page shows you where to click in the address bar to allow them.
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.
5. Check the clock. Alarms go by this device's clock. If it's more than a minute out, the yellow bar says so. Turn on Set time automatically in the device's date and time settings.

Install as an app

The app opens in its own window with its own icon, so it's harder to close by mistake. It also opens when the server can't be reached. Saved lists and wing setups load again once it's back.

• Edge or Chrome on a computer: click the install icon at the right end of the address bar. In Edge you can also use the ⋯ menu › Apps › Install this site as an app.
• Android: in Chrome, open the ⋮ menu and choose Add to Home screen or Install app.
• iPhone or iPad: in Safari, tap Share › Add to Home Screen.

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.
• Settings is one menu for both tabs, and the Settings button on either tab opens it. Every setting changes both tabs, including the alarm sound, volume, your own sound file, time format and the pre-warning chime. Times show in 24-hour unless you set Time format to 12-hour; then every time shows AM or PM. The Backup file holds your alarms and your wing setup.
• The pre-warning chime plays a few minutes before each alarm and changeover. Timers don't get one.

Keyboard shortcuts

These work on both tabs, but not while you're typing in a box.

N

New alarm (opens the Alarm tab)

T

New timer (opens the Alarm tab)

Space

Stop everything that's ringing

S

Snooze everything that's ringing

Ctrl + Z

Undo a delete in the Alarm tab

?

Show this list

Esc

Close a menu or this guide, or stop editing an alarm

← →

Switch between the Alarm and Wing tabs, when the tab bar is selected

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. With 12-hour time, pick AM or PM too.
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: one menu for both tabs. Backup file › Export saves your alarms and wing setup to a file, and Import loads them back.

Work out a changeover schedule

1. Times. Type the Unlock and Lockup times as 4 digits, for example 0745 and 1115. With 12-hour time, pick AM or PM beside each box.
2. Routine. Choose the Unit routine:
   • B Routine: wings in the same group unlock together. Groups run in number order, Group 1 first. Changeover is 10 min.
   • C Routine: each wing unlocks on its own, starting from the top of the list. Changeover is 5 min.
   You can still pick 5 min or 10 min after choosing the routine.
3. Wings. Type each wing's name and count (number of prisoners). For B Routine, choose each wing's Group (1 to 20). + Add wing adds a row (up to 20), reorders, removes, and Reset puts back the standard wings.
4. Press Calculate. Any box that still needs filling in is outlined in red.

Reading the results

• The time between unlock and lockup is split evenly between the groups (or wings, for C Routine).
• Each one 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 changeover copies its entry, ready to paste into TOMS.
• Morning: from 0705 (0805 on Sundays) until the unlock time. It shows once a morning unlock time is entered.
• Lunch: 1145 to 1245 (1115 to 1215 on Wednesdays).
• Afternoon: from 1245 (1215 on Wednesdays) until the unlock time. It shows once an afternoon unlock time is entered.
• These use the total of the wing counts. The small line under each button shows what it will copy, or what's still missing.
• The copied text always uses 24-hour time, the way TOMS has it, even with 12-hour time on.

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: one menu for both tabs. Wing changeover alarms turns the changeover alarms on or off.