If the time is up, but the alert didn’t sound on the iPad app or iPhone app, you can turn on the sound by doing the following:
- First, edit your Timer in Settings and make sure Audible Signal is turned ON.
- Next, make sure your device’s volume is turned up.
- Finally, check that the mute button (above your volume buttons) is turned OFF. If you can see an orange dot on this button, then Mute is ON. Toggle it off and try your Timer again.
If you hear the audible alert, but it's too loud or too quiet, please check out this write-up for adjusting the alarm volume.