You can set an audible alarm on the iOS app by going into the Timer Settings when you begin to set a timer. 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:
1. Check your Time Timer app Timer Settings
Within the Time Timer app, go to your Timer Settings and make sure Audible Signal is turned ON.
2. Check your iOS Sound Settings
Make sure your device’s volume is turned up. Often times, this can be changed by pressing the Volume Up button on the side of your device. Though, some iOS users intentionally disable the "Change with Button" options, making it necessary to navigate to the Sound settings and move the Ringer and Alerts volume slider at the top of the page.
3. Check the Mute Switch on your device
Ensure that the Mute Switch (on the side of your device by the 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.
4. Check your Do Not Disturb setting
Ensure that the Do Not Disturb feature is turned OFF. This feature is accessible via the iOS Control Center or within Settings > Do Not Disturb.
5. Check your Silent Mode setting
Ensure that the Silent Mode feature is turned OFF. This feature is accessible via the iOS Control Center.
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.