Most comparisons of alarm apps skip the only competitor that matters. Whatever you install is competing with the Clock app, which is free, already on your phone, and has never once failed to ring.
Alarmy is the largest paid alternative — its own onboarding claims 100 million downloads and a number one position in 97 countries. So the question is narrow and answerable: what does it do that Clock does not, and is that worth a subscription?
Disclosure: this site belongs to Fifi, an iPhone alarm app in the same category. This post compares Alarmy to Apple's Clock and makes no claim about Fifi. Observations of Alarmy are from a shipped build captured 2026-08-02 and may not describe the current version.
Start with what Clock already does
It is worth being precise about this, because a lot of alarm-app marketing relies on you misremembering it.
Clock rings through the silent switch. It rings through Focus and Do Not Disturb. It rings at full volume regardless of your media volume. It survives a reboot, a dead-and-charged battery, and airplane mode, because the alarm is a local object the OS owns and nothing about it needs a network. It adjusts itself for daylight saving. It has a snooze you can configure.
For most people, most of the time, that is a solved problem, and the honest answer to "should I replace Clock" is usually no.
Clock's actual limitation is narrow: it will let you turn it off. One swipe, one tap, no resistance, and if you are the kind of sleeper whose half-asleep self dismisses alarms and does not remember doing it, Clock has no answer for that at all. It is not built to argue with you.
What Alarmy adds
Alarmy's core idea is that dismissal should cost something. Instead of a slider, you get a mission: solve a math problem, shake the phone a set number of times, walk to a specific place and photograph it, scan a barcode. The alarm does not stop until the task is done, and the task is chosen to require enough cognition or movement that you cannot complete it while still asleep.
That is a real answer to a real failure mode, and nothing in Clock does it. In the build observed, the alarm-edit sheet lets you stack up to five missions on a single alarm.
Around that, the app is much larger than Clock: five tabs covering alarms, microphone-based sleep and snore tracking, a weather-and-morning screen with a pet, a mood check and a daily tarot card, and a reporting tab with wake-up averages and habit charts.
It can also now set real alarms — the same kind Apple's Clock sets, which your phone fires itself. Worth knowing, because for years alarm apps could not, and that is where their reputation for letting people down came from. You can check this yourself in a minute.
What you pay, and it is not only money
This is where the comparison gets less flattering, and it is the part most listicles leave out.
There are ads, and the inventory is not curated. Banner and native ad units appear on nearly every tab, including above the tab bar where you dismiss your alarm. Units observed in the captured build included gambling-adjacent promotions. For an app you interact with at your least defended moment of the day, that is a real cost.
There is a tracking-consent prompt, primed. Before iOS's own App Tracking Transparency dialog fires, the app shows its own screen explaining why you should say yes, framed around ad personalization. This is a well-known pattern for lifting opt-in rates, and it tells you ads are a first-class revenue channel rather than an afterthought.
The discount pressure starts before you have used it. A "New user exclusive, only now, 50% off" annual-plan modal fires immediately after onboarding — before you have set a single real alarm or seen whether the thing works for you.
Some of what it sells is atmosphere. The onboarding leads with "the only alarm listed in medical journals" over three blurred university seals, and stats like "Morning Productivity 2x" and "Goal Achievement +15%" with no source attached. Those are not findings. They are the shape of a finding.
And the paywalling is on the wrong things, arguably. The core alarm rings for free — Alarmy does not gate reliability, which is to its credit. But several dismissal features, including the extra-loud effect and a "wake up check," sit behind Pro. Dismissal difficulty is the entire reason to install this app.
The straight answer
Use Clock if your alarm mostly works and your problem is going to bed rather than getting up. Nothing in this category fixes that, and Clock has no ads, no subscription, and no tab with a tarot card in it.
Consider Alarmy if your specific, repeated failure is dismissing an alarm while unconscious. The mission mechanic addresses that directly and Clock has nothing equivalent. Go in knowing you are accepting ad inventory and a fairly aggressive sales posture as part of the deal.
Neither, if your failure is different from both. Sleeping through an alarm entirely, snoozing for an hour, and waking up fine but losing the next thirty minutes are three different problems with three different mechanisms — which one is yours is worth establishing before you install anything, because the fix for one does nothing for the others.
The broader point: now that system-grade alarms are available to every app, reliability has stopped being what separates them. What is left is what an app does in the thirty seconds after it rings, and that is a design question with no settled answer yet.