Ranked by the only thing that matters at 6:40 in the morning: what the app forces you to do before it will shut up.
Volume is the wrong lever. If you are a genuinely heavy sleeper, you are not failing to hear the alarm — you are dismissing it while still asleep and not remembering it. A louder alarm just makes that dismissal faster.
What works is making dismissal require something you physically cannot do in bed. In order of how reliably it wakes people: walking a set number of steps or scanning a barcode left in another room beats taking a photo of a specific place, which beats solving arithmetic, which beats shaking the phone. Any of them beats a louder sound.
Second reliability filter, and it eliminates a lot of apps: does the alarm ring through Silent Mode and Focus? An app that relies only on local notifications will be muted or delayed. Every app below holds a system-level alarm or protected background audio.
| App | US ratings | Hardest mission | Pick it if |
|---|---|---|---|
| Alarmy | 242,412 · 4.8★ | Photo, steps, squats, typing, memory | You want the safest, most complete option |
| Loud Alarm Clock – the LOUDEST | 39,023 · 4.8★ | Volume-first, light missions | You wake up fine but sleep through quiet alarms |
| Wayk | 18,284 · 4.8★ | Mission set, clean design | Alarmy feels cluttered to you |
| Mathe Alarm Clock | 8,208 · 4.5★ | Arithmetic only, tunable difficulty | You only want math and nothing else |
| SuperAlarm | 4,497 · 4.6★ | Loud + basic missions | You want something lighter than Alarmy |
| Barcode Alarm Clock | 1,240 · 4.4★ | Barcode in another room | Barcode is the only mission you trust |
| Wakora (mine) | new · few ratings | Barcode, steps, push-ups + snooze ladder | You want escalating snooze cost, not a snooze-free app |
Rating counts read from the US App Store on 12 August 2026 via the public iTunes lookup API. They change; the ordering of magnitude does not.
Alarmy has the largest mission library, the longest history and versions on both platforms. If someone asks me for one recommendation and does not care about anything else, this is it. The trade-off is surface area: a lot of screens, a lot of permission prompts, and a paywall that shows up early.
Every other app on this list exists because a slice of people want less: one mission type instead of twelve, a single screen instead of a dashboard, or a specific behaviour Alarmy does not have. That is a legitimate reason to pick a small app — and not a reason to pick one with no track record if reliability is your only concern.
What is different: the snooze ladder. Most mission alarms treat snooze as either free or forbidden. Removing snooze entirely usually backfires — people delete the app after one bad morning. Wakora keeps snooze but makes each one cost more than the last, with a daily cap. 20 missions, 8 of which cannot be finished in bed. It also ships an alarm-integrity warning: if iOS ever interrupted scheduling, the app tells you instead of failing silently.
Where it loses: it is new, it has almost no ratings yet, it is iPhone-only, and it has fewer mission types than Alarmy. If you need an alarm you can trust tomorrow for a flight, use the app with a quarter of a million ratings, not mine.
See Wakora on the App StoreOnly if the free version already wakes you. Every app here is free to download and gates harder missions behind a subscription. Test the free mission for a week; if you sleep through it, a paid tier of the same app will not fix that — a physically harder mission will.
Snoozing is a different problem from waking. Look for escalating snooze cost or a hard daily cap rather than a snooze-free design.
Alarmy and Sleep as Android are the usual answers. Wakora is iPhone-only.