The best alarm apps for heavy sleepers

If you are a heavy sleeper, volume is not your problem. Dismissal is your problem. You do hear the alarm — you just turn it off and go back to sleep, and you often do not remember doing it. So the only alarm app worth paying for is one that refuses to be turned off by a person who is barely conscious. On iPhone that is Risly or Alarmy. Everything else on this page is here because it is genuinely better at something else.

We make Risly. That is a conflict of interest, so this list tells you plainly where we lose.

The one number you should know before installing anything

The CDC reported in *MMWR* (2016) that 35.2% of US adults sleep fewer than seven hours a night. A large share of people who describe themselves as heavy sleepers are simply short of sleep, and a short-of-sleep brain in deep sleep at 6am will dismiss an alarm the way you swat a fly: automatically, and without laying down a memory of it. No app fixes that. An earlier bedtime does. Install the app anyway if you like — but if you are running on five hours, you are buying a tourniquet.

1. Risly — the alarm with no snooze button

The alarm rings and there is no button to stop it. There is a mission: scan an object you registered somewhere else in the house, solve chained math problems, shake the phone hard enough for long enough, or do push-ups that the front camera counts. Camera missions run on-device. Finish the mission and the alarm stops. Do not finish it and the alarm does not stop.

The part that matters for heavy sleepers specifically: Risly is built on AlarmKit, the iOS 26 framework that lets a third-party app schedule a real system alarm. It rings through silent mode, through Focus, through Do Not Disturb, and it rings if you force-quit the app. Most alarm apps cannot promise that, which is why their support pages ask you to reconfigure your phone. Full explanation on the anti-snooze page.

Where it loses: iOS 26 or later only, so no Android and no older iPhones. No sleep tracking. No sleep sounds. It is unpleasant on purpose, and if you want to be woken kindly you will hate it.

2. Alarmy — the deepest feature set on the market

Alarmy, from Seoul studio Delight Room, has been on the store since 2014 and reports over 120 million downloads. It has more mission types than anyone: photo, barcode, QR, math, memory cards, typing, shake, squats. It tracks sleep. It has a "wake-up check" that catches you if you crawl back to bed. On Android it is close to unbeatable.

Where it loses: the free tier has ads, the app has accumulated a lot of surface area, and — the real one — it is not built on AlarmKit, so its own support documentation asks you to disable silent mode and Do Not Disturb. We break the comparison down properly in Alarmy alternatives.

3. Sleep Cycle — the best app on this list, for a different problem

Sleep Cycle wakes you inside a 30-minute window at the lightest point of sleep it can detect, and its sleep tracking is the best of anything here. If your complaint is "I get up on time but I feel destroyed", this is your app and the mission-based alarms are the wrong purchase.

Where it loses for heavy sleepers: it has a snooze button, and its philosophy is to be kind to you. A heavy sleeper does not need kindness at 6:40am. They need an obstacle.

4. Alarm Clock Xtreme — good, and irrelevant on iPhone

Half the listicles on this keyword recommend Alarm Clock Xtreme to iPhone users. It is Android-only. On Android it is a strong free option with math dismissal and a decent widget. On iOS it does not exist, and any article telling you otherwise did not check.

5. The iPhone Clock app — try this before you pay anyone

Open the Clock app, edit your alarm, and turn the Snooze toggle off. It is free, it rings through silent mode and Focus, and for a surprising number of people that single toggle is the whole fix. Its weakness is that dismissing it takes one swipe and no thought, which is exactly the action a half-asleep heavy sleeper is best at. If you have tried it and you are still sleeping through your alarm, that is your signal to move up this list.

Three things no alarm app will fix

Worth saying before you spend money, because a paid app that does not work is worse than no app: it burns the belief that anything can work.

• Not enough sleep. If you are getting under seven hours, every app on this page is a tourniquet on a problem that needs a bedtime. Move the bedtime. Then buy the app if you still need it.
• A medical cause. Sleep apnea, narcolepsy, thyroid disorders and depression all present as "I cannot wake up", and none of them responds to a louder phone. If you sleep nine hours and still cannot move, see a doctor before you see the App Store.
• Being on an older iPhone. Risly requires iOS 26 or later, because AlarmKit does not exist before it. On iOS 18, no third-party alarm can promise you a system-grade alarm, and you are better off with the Clock app and the snooze toggle off.

And one thing an app *can* fix that most people never try: the first alarm being a lie. If you set 6:00 and get up at 6:40, you do not have an alarm problem, you have a scheduling fiction. Set it for 6:40. Half the people who describe themselves as heavy sleepers are simply arguing with an alarm they never intended to obey.

How to pick, in one paragraph

If you are late: Risly or Alarmy. If you are on Android: Alarmy or Alarm Clock Xtreme. If you are groggy but punctual: Sleep Cycle. If you have never turned off the built-in snooze toggle: do that first, for free, tonight. And whichever you choose, put the phone across the room. Every app on this list works better from six feet away.