Head to head
Pillow vs Sleep Cycle
Wrist or nightstand is the whole question here. Pillow is at its best with an Apple Watch on your arm. Sleep Cycle assumes you have nothing but a phone and builds from there.
In short
If you wear an Apple Watch to bed, Pillow gives you measured stage data and starts itself. If you do not own a Watch, or half the house is on Android, Sleep Cycle is the sensible pick.
Pillow is a Watch product with a phone attached
Pillow pairs with the Apple Watch for automatic tracking, which buys you two things a nightstand cannot. Stages come off the wrist as measurements rather than estimates, and the night starts by itself because the Watch knows you fell asleep before you do.
It also round-trips deeply with Apple Health, which matters more than it sounds if you already have years of data in there and want everything living in one place.
Sleep Cycle assumes you own nothing but the phone
Sleep Cycle has been reading nights off a phone microphone longer than most of this category has existed. It estimates the shape of the night from sound and movement and rings inside a window rather than at an exact minute, so the alarm can find a lighter moment near your set time.
The two practical wins are cost and reach. There is no hardware to buy, and it runs on Android, so a mixed household can share the same habit and compare notes.
Phone-only stages are estimates. Useful for spotting patterns over weeks, not the same as wrist measurements.
The alarm is the part people forget to check
A lot of people arrive at this comparison thinking about data and leave having realised they mostly wanted a better morning. Sleep Cycle is built around waking you inside a window. Pillow puts its effort into tracking, and the tracking is the reason to buy it.
So decide which of those two you will use every single day. Charts get looked at for a fortnight. An alarm goes off three hundred and sixty-five times a year.
A third route if the Watch is the sticking point
If you want measured stages you need something on your wrist, and Pillow is the better of these two at using it. If you would rather not sleep in a Watch, but you do want the alarm to be the centre of the product, Tock is worth a look: it tracks from the phone, so stages are estimates, but the alarm is built on AlarmKit and rings on silent, through a Focus and with the app closed.
Tock has no Watch app of its own. It reads Watch data through Apple Health instead. iPhone only, 3-day trial, then from $39.99 a year.
| What we compared | Pillow | Sleep Cycle |
|---|---|---|
| A real Apple Watch app | Yes, tracking on the wrist (stronger here) | Phone microphone only |
| Starting the night | Detected automatically (stronger here) | Less hands-off |
| Stage data | Measured, with the Watch (stronger here) | Estimated from the phone |
| Charting the night | Yes, nightly (about the same) | Yes, nightly (about the same) |
| Apple Health round-tripping | Deep, in both directions (stronger here) | Not the selling point |
| Waking you at a light moment | Tracking is the focus | A smart alarm window (stronger here) |
| An Android phone in the house | iPhone, Watch and iPad | iPhone and Android (stronger here) |
| Hardware you have to buy | Best with a Watch | Nothing beyond the phone (stronger here) |
Which one to actually install
Pick Pillow if
Pillow is the pick if there is an Apple Watch on your wrist at night. It is the only one of the two that can give you measured stages and start the night without being told.
Pick Sleep Cycle if
Sleep Cycle is the pick if the phone is all you have, or your household is split between iPhone and Android and you want everyone on the same app.
Pick neither if
If the alarm matters more to you than the charts and you are on iPhone, Tock is an alarm first: it watches the half hour before your set time, rings a little early in a lighter moment, and asks you to solve something before it stops.
Questions people ask
Does Pillow work without an Apple Watch?
Pillow is built around pairing with the Watch for automatic tracking. Without one you lose the part that makes it worth choosing over a phone-only tracker.
Which one gives more accurate sleep stages?
Pillow with an Apple Watch, because wrist sensors measure rather than infer. Sleep Cycle estimates stages from a phone microphone, which is a different kind of number and should be read as a pattern rather than a fact.
Is there an Android version of Pillow?
No. Pillow is iPhone, Apple Watch and iPad. Sleep Cycle is the cross-platform option of the two.
Do both write into Apple Health?
Pillow makes deep Health round-tripping one of its selling points. If having everything land in Health is the reason you are choosing, that is the one to look at first.
Where Tock sits against each of them
These pages are written the same way as this one, which means they state what Pillow and Sleep Cycle each do better than we do.
Related matchups
Other pairings involving one of these two.
- Alarmy vs PillowThese two aren't really competing. Choose Alarmy if the problem is that you stay in bed. Choose Pillow if you own an Apple Watch and the problem is that you have no idea what your nights look like.
- Alarmy vs Sleep CyclePick Alarmy if you sleep through alarms and need one you can't beat. Pick Sleep Cycle if you wake up on time but feel wrecked when you do, and you want a gentler window plus a record of the night.
- 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 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.
- AutoSleep vs PillowAutoSleep suits the person who wants every number and no recurring bill. Pillow suits the person who wants the night caught automatically and presented calmly, then written properly into Apple Health.
- AutoSleep vs Sleep CycleIf you already wear an Apple Watch to bed, AutoSleep reads a night that Sleep Cycle can only estimate from the room. If you don't own a Watch and don't want one, Sleep Cycle is the only one of the two that works, and it's your alarm as well.
- Calm vs Sleep CycleIf the problem is lying awake with a busy head, Calm. If the problem is groggy mornings and having no idea what your nights look like, Sleep Cycle. Most people searching this have already decided which; they just have not said it out loud.
- Pillow vs SleepScoreIf an Apple Watch is already part of your night, Pillow gets far more out of it than SleepScore can from across the room. If buying a wearable is off the table for you, SleepScore was made for exactly that person.
Elsewhere on the site
A different corner of the same problem.
- RoundupsThe best sleep trackers that don't need a watchTock is the best sleep tracker without a watch. Leave the phone on the nightstand and it uses the microphone and accelerometer all night, classifies snores, coughs and sleep talking on device, and hands you a report plus the audio in the morning. SleepScore is the strongest alternative if you would rather nothing listened to the room.
- Wake timesWaking up at 4:30amBedtimes by sleep cycle for a 4:30am alarm.
- BedtimesGoing to bed at 9:00pmWhere to put the alarm after a 9:00pm lights-out.
- Sleep by ageHow much sleep preschoolers needThe American Academy of Sleep Medicine recommends that children aged 3 to 5 years sleep 10 to 13 hours per 24 hours, including naps, on a regular basis. This is the final band where daytime sleep counts toward the total; from age 6 the figures are given per night.
- NapsThe coffee napA coffee nap means drinking caffeine and then immediately napping for about 20 minutes. Caffeine takes roughly 20 to 30 minutes to have a noticeable effect, so it does not stop you falling asleep quickly, and you wake as it takes hold. The two effects add rather than cancel.
- Wake tonesSunrise alarmA sunrise alarm clock is a bedside lamp that brightens over roughly 20 to 30 minutes before your set time, and the light is the part you are paying for. Tock is an iPhone app with no light hardware at all, so it takes the timing half instead: a soft wake tone rung at a lighter moment inside the last 30 minutes rather than at a fixed time.
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.