Head to head
The iPhone Clock app vs Apple Health Sleep
Two pieces of the same phone, and Apple has moved the line between them more than once, which is why people keep searching for a fight that isn't happening.
In short
This isn't a choice. The Clock app is the alarm and Apple's Sleep schedule is the plan around it, and if you wear an Apple Watch to bed the Sleep side is the only one of the two that records anything at all.
One of them rings, the other decides when it should
The Clock app is Apple's alarm: free, already installed, and about as reliable as software gets. Apple Health Sleep is the schedule and the Sleep Focus around that alarm, plus the record of what happened if you wore a Watch.
They were never alternatives. Almost everyone who compares them ends up using both, usually without noticing which half did what.
Without a Watch, the Sleep half is mostly a schedule
Set a bedtime and a wake time and your phone will hold you to it, quiet itself at night and remind you when to start winding down. That's genuinely useful, and it's also close to the whole of it if there's nothing on your wrist.
You'll see time in bed rather than a picture of the night, which is worth knowing before you go looking for stage charts that were never going to be there.
A Watch on your wrist changes the answer completely
Wear an Apple Watch to bed and the Sleep side starts producing measured stage data, the thing a phone on a nightstand can't do. It also becomes the system of record every other sleep app on your phone reads from and writes to.
At that point the built-in tools are doing real work for free, and the question stops being which Apple app to use and becomes whether anything else is worth adding.
Neither of them will move your alarm
Apple's alarm rings at the time you chose. Apple's schedule holds that time steady. Nothing in either one is watching for a lighter moment to wake you in, because neither was built to.
If you've ever been pulled out of the deepest part of a night by a perfectly punctual alarm, that gap is the one you're feeling.
| What we compared | the iPhone Clock app | Apple Health Sleep |
|---|---|---|
| What it actually does | Rings at a time (about the same) | Sets a schedule and Focus (about the same) |
| Cost | Free, built in (about the same) | Free, built in (about the same) |
| Records your night | Nothing at all | Yes, with a Watch (stronger here) |
| Sleep stages | Not something it does | Measured, if you wear a Watch (stronger here) |
| Useful with no Watch | Yes, nothing else needed (stronger here) | Mostly just a schedule |
| A one-off alarm for Tuesday | Two taps (stronger here) | Not what it is for |
| What other apps read | Not a data source | The system of record (stronger here) |
| Ringing in lighter sleep | Fixed time only (about the same) | Fixed schedule only (about the same) |
Which one to actually install
Pick the iPhone Clock app if
The Clock app is the alarm, and there's no version of this where you stop using it. If being woken at a time you chose was the whole requirement, you're already done.
Pick Apple Health Sleep if
Turn on Apple's Sleep schedule if you want a steady bedtime, the Sleep Focus quieting your phone at night, and, with a Watch, measured stage data landing in Health where everything else can read it.
Pick neither if
Neither half watches for a lighter moment, because neither was built to. Tock is an iPhone alarm on the same AlarmKit framework, so it still rings on silent and through a Focus, but it tracks the last stretch of the night and can ring a few minutes early while you're already light. It reads your Apple Health data rather than replacing it. A 3-day trial, then from $39.99 a year.
Questions people ask
Do I need both?
Effectively yes, and you already have both. The Clock app is where the alarm lives. The Sleep schedule is where the bedtime, the Focus and, with a Watch, the record of the night live.
Does Apple's Sleep schedule wake me up?
It sets the wake time, and the alarm still comes from the Clock app. Think of the schedule as the intention and the Clock app as the noise.
Can Apple Health show sleep stages without a Watch?
Not really. Stage data comes from something on your body. Without a Watch you get a schedule and time in bed, which is useful but isn't a picture of the night.
Which one do other sleep apps use?
Apple Health. It's the system of record almost every sleep app reads from and writes to, including apps that do their own tracking.
Where Tock sits against each of them
These pages are written the same way as this one, which means they state what the iPhone Clock app and Apple Health Sleep each do better than we do.
Related matchups
Other pairings involving one of these two.
- Alarmy vs the iPhone Clock appIf you get up when your alarm goes off, the Clock app is the honest answer and Alarmy is friction you don't need. If you dismiss alarms in your sleep and it has already cost you something, Alarmy's tasks are the only thing on this page that changes the outcome.
- the iPhone Clock app vs Sleep as AndroidYour phone already decided this. Sleep as Android has no iOS version and Apple's Clock app has no Android version, so unless you're switching phones over an alarm clock, the answer is whichever one you can install.
- Apple Health Sleep vs AutoSleepIf you wear your Apple Watch to bed and want to know how long you slept, Apple's own tracking is free and already doing it. AutoSleep is for the person who wants that night pulled apart into far more detail than Apple would ever ship.
- Apple Health Sleep vs PillowApple's built-in tracking is enough if you want hours and stages and nothing more. Pillow is for the Watch wearer who finds Apple's presentation too thin and wants the night detected and shaped for them without pressing anything.
- Apple Health Sleep vs RiseApple is the better record and Rise is the better plan. If you keep opening your stage chart and still don't know what to change, Rise is the one built to answer that.
- Apple Health Sleep vs Sleep CycleIf you wear an Apple Watch to bed, Apple's built-in tracking is more accurate and costs nothing, so Sleep Cycle has to win on the alarm and the sound library instead. If you don't own a Watch, Sleep Cycle is the only one of the two that records anything.
Elsewhere on the site
A different corner of the same problem.
- AlternativesTock vs CalmTock is not a Calm replacement and does not try to be. Calm has a narrated library with named voices and licensed music that a small team cannot match. Tock wakes you, tracks the night and tells you what happened. If falling asleep is your problem, Calm is the better buy.
- RoundupsThe best alarm apps for heavy sleepersTock is the best alarm app for heavy sleepers: it rings on AlarmKit, so it gets through silent mode and a Focus, and it keeps ringing until you finish a small task. Alarmy is the real rival and the better pick if you want the widest set of dismissal tasks or a free tier to test the idea on.
- Wake timesWaking up at 4:30amBedtimes by sleep cycle for a 4:30am alarm.
- BedtimesGoing to bed at 3:00amWhere to put the alarm after a 3:00am lights-out.
- Sleep by ageHow much sleep adults needThe American Academy of Sleep Medicine recommends that adults sleep 7 or more hours per night on a regular basis to promote optimal health. It is expressed as a minimum rather than a range because the evidence supports a lower bound far more firmly than it supports an ideal figure.
- NapsThe 90 minute napA 90 minute nap is approximately one full sleep cycle, which means it ends in a lighter stage rather than in slow wave sleep. That produces much less grogginess than a 30 or 60 minute nap, and it includes both the deep sleep and the REM that shorter naps miss.
If neither of them is quite the alarm you wanted
Tock is built on Apple AlarmKit, so it rings on silent and through a Focus, moves earlier when it finds a lighter moment, and keeps ringing until you solve something.