Users report that power cycling the Apple Watch can fix alarms not triggering at all. Meanwhile, disabling silent mode should fix the Apple Watch alarm with no sound error. Heavy sleepers can adjust the Sound & Haptics settings to make Apple Watch alarms louder and/or silent haptic alarms stronger.

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: … Open the Clock app, tap the Alarm tab, then tap . . . Read more

This may be due to your Sounds & Haptics settings. On your Apple Watch, go to Settings > Sounds & Haptics. From there, check your volume, volume limit and haptic alerts.

The AutoSleep 6.4 Apple Watch app now has a built in Smart Alarm. It requires WatchOS 6 or higher. You can now set an alarm directly in the Watch app and it even works in flight mode!

When you enable it in the iPhone’s Watch app, in General > Nightstand Mode, a charging Apple Watch displays the charging status, current time and date (in a large, easily readable font), and the time of any alarm you’ve set. …

How to Set a Silent Tap Alarm on Apple Watch. Swipe up from the bottom of your Apple Watch’s screen when the watch face is being shown. Tap the bell icon to place your Apple Watch into Silent Mode.

Want to set a vibrating alarm on iPhone? You can easily setup an iPhone vibrating alarm clock with the built-in Clock app that comes preinstalled in iOS. With a few configuration settings, you can quickly create a simple vibrate-only alarm on iPhone that will not play any sound or audio . . . Read more

Under Alarmy settings, set the alarm volume. This affects the default clock alarm volume as well. You Can install the "Alarm Clock Xtreme" application and it will sound even if the device is on silent mode. My problem also solved using this application.

Open the Settings app. Scroll down and tap Sounds & Haptics. Turn Haptic Alerts on or off. To add extra emphasis to haptic alerts, tap Prominent.

Do Not Disturb is switched on. If Do Not Disturb is turned on, your Apple Watch won’t vibrate when you receive text messages or other notifications. … It’s possible to switch off notifications to your Apple Watch which means the device will no longer notify you when you get a . . . Read more