Updated
If you sleep through alarms, the usual advice is to get a louder one. Put the phone across the room. Stack five of them. And for a while, that sort of works, until the morning it does not.
Here is the thing most heavy sleeper articles skip: a lot of the time the alarm did not fail because it was too quiet. It failed because it never made a sound at all.
Loud only helps if the sound actually plays. A phone can be set to full volume and still stay silent in the morning. The ringer volume is separate from the media volume. A Focus schedule can mute it. The sound can route to a Bluetooth speaker or AirPods instead of the phone. On Android, the manufacturer's battery settings can stop the alarm app after an update. None of that is a volume problem, and a louder alarm does not fix any of it.
So the real question is not how loud. It is whether it will actually go off. And you cannot tell the answer by looking at the alarm the night before. It says it is on. It looks set. You find out at 9:03.
If you are a genuinely heavy sleeper, a few things do help once the sound actually plays: put the phone far enough that you have to stand up, use a rising tone rather than a sudden blast, and keep a consistent wake time so your body starts to expect it. But all of that is downstream of one thing, that the alarm rings at all.
That is the gap Snora fills. Snora is an alarm you set like any other, and before you sleep it reads the settings that quietly mute alarms, then shows one status: Safe, Caution, or Risk. It is a status, not a score to chase, and it makes no claim to cure being a heavy sleeper. It reads whether your alarm is actually set up to go off. The alarm and the check are free, and no account is needed.
So if you have tried the loudest alarm on the store and still overslept, the loudness probably was not the problem. Check the setup tonight, and you will know before you close your eyes.
FAQ
What is the best alarm for heavy sleepers?
The best alarm for a heavy sleeper is one that reliably rings, not the loudest one you can find. Loudness helps only after the sound plays, so an alarm that survives silent switches, Focus schedules, and background limits matters more than raw volume. Look for an alarm whose setup you can confirm before bed, and pair it with placing the phone out of reach.
Why do I sleep through my alarm even at full volume?
You can sleep through a full volume alarm because full volume covers only one sound channel, and the alarm may play through a different one or none at all. On iPhone the ringer volume is separate from the media volume, and a Focus or Do Not Disturb schedule can silence an app's alert. On Android, a manufacturer battery setting can pause the alarm app in the background, sometimes after a system update. A louder setting does not change any of this.
How can heavy sleepers wake up in the morning?
Heavy sleepers tend to wake more easily when the alarm forces movement and the body knows what to expect. Put the phone somewhere you have to stand up to reach, pick a gradually rising tone instead of a sudden blast, and try to sleep and wake at similar times each day. These habits only matter once the alarm actually makes a sound, so confirm the setup first.
Why didn't my alarm go off even though it was set?
An alarm that looked set can still stay silent if something muted or blocked it overnight. The sound may have routed to a paired Bluetooth device, an app's alert may have been silenced by a Focus schedule, or on Android the battery setting under Settings, then Apps, then your alarm app, then Battery may have stopped it in the background. Snora does a quick check before you sleep, reading the alarm permissions it can and guiding you through the rest, then shows one status of Safe, Caution, or Risk so you find out the night before instead of at wake time.