Timer alarm not working, reboot only helps for a time or too

Hello Joolsnewlife,

Thank you for using Apple Support Communities. Sounds like you're experiencing issues with your timer not properly working. If so, we'd like to recommend some additional steps to see if we can get this issue sorted out. Restarting your device was a great step to try. Let's follow the steps below:

1.) Force close the Clock app.

2.) Review and follow the guidance listed at the bottom: How to set and change alarms on your iPhone - Apple Support

If the alarm volume is too low or quiet

Do Not Disturb and the Ring/Silent switch don't affect the alarm sound. If you set your Ring/Silent switch to Silent or turn on Do Not Disturb, the alarm still sounds.

If you have an alarm that doesn't sound or is too quiet, or if your iPhone only vibrates, check the following:

* Set the volume on your iPhone. If your alarm volume is too low or too loud, press the volume up or volume down button to adjust it. You can also go to Settings > Sounds & Haptics and drag the slider under Ringtone and Alert Volume.

* If your alarm only vibrates, make sure that your alarm sound isn't set to None. Open the Clock app, tap the Alarm tab, then tap Edit. Tap the alarm, then tap Sound and choose a Sound.

* If you connect headphones to your iPhone, the alarm plays at a set volume through the built-in speakers on your iPhone as well as wired and wireless headphones.

Manually adjusting the time on your iPhone in Settings to change app behavior, like game timers, isn't recommended and can affect alarms.

If these steps don't resolve your issue, please consider reaching out to Apple Support for help. They might have to investigate this issue further with you. You can use the following link to contact them: support.apple.com/contact

Take care.