Sleep Time - Alarm Clock and Sleep Cycle Analysis with Soundscapes Health & Fitness App Review (iOS, Free)


Languages: English, French, Slovenian

Seller: Azumio Inc.

Performance enhancements

Customer Ratings

Current Version:
89 Ratings
All Versions:
2431 Ratings
Health & FitnessFreeBestIOS


Smart alarm clock that analyze your sleep and wakes you up at the perfect moment of your lightest sleep phase. Wake up feeling refreshed.
Featured on TechCrunch, Lifehacker, Mashable, 148apps and many others...

Version 2.2 has arrived! With this release, Sleep Time is now the most feature-rich sleep analysis and alarm clock app on the App Store.

Why buy a second app you have to turn on every night to play music as you fall asleep? We listened to YOUR feedback and now you get a TWO-IN-ONE app: a soundscape AND a sleep cycle alarm clock in one easy package!

Sleep Time uses the sensitive accelerometer in your iPhone to detect movements during the night. Our advanced algorithm determines your phase of sleep, and sets off the alarm at the perfect moment. You will never wake up from a deep sleep feeling groggy again.

Find out why over 35 MILLION users love our apps!

* Set the alarm clock with a single gesture
* Fall asleep to a gentle breeze soundscape
* Alarm rings even in silent mode
* Sleep Lab™ with sleep cycle analysis
* Detailed weekly graphs of your sleep cycles
* Advanced wake-up optimization algorithm
* Instant Heart Rate integration to detect pulse
* Backup and restore your sleep data on the cloud
* No glasses needed for our easy to read interface!

Let us know how you like the app! Visit us at:

Sweet Dreams!

***** Azumio Team *****

This app uses a third party service Flurry Analytics, which uses your device MAC address to track the app's usage patterns.

Customer Reviews

  • Good

    by acer1976

    Good app

  • Excellent

    by Etienne Roux

    Very accurate, and sensitive on iPhone 4 and new 5S. Works even on a Sleep Number air mattress

  • Good!

    by Wendyma1111

    Feel more energetic in the morning than before.

  • Great app!

    by Prsce24

    Pretty handy! Works quite well in the morning, I wake up feeling quite refreshed when using this app!

  • Best sleep app

    by Mxjoker

    Tried them all and this is the winner

  • Helpful

    by Raymer0

    I very much enjoy the app, and use it daily.

  • Works great

    by dvw1880

    Great app. I use it every night, and it seems reasonably accurate.

  • Awesome alarm clock

    by Astray71

    I use this as my alarm clock and its much easier to wake up to this than your regular iphone alarm which just blares out sound. The sleep pattern display is a really cool feature that I like to look at in the morning too

  • Helps your peace of mind.

    by Totheblues

    Great app! Very helpful in evaluating sleep patterns. Wondering if you were truly awake from 2 am until 5 am? This will show you.

  • Sleep Time - pretty good

    by The man in the hat.

    I tried a couple of these sleep apps. Sleep time is my favorite of them because it seems to do a better job choosing the wake time.

  • Works amazingly well!!

    by Alexsleep

    Better than any other device I have tried!

  • Nice app

    by Passinthru1313

    Pleasant to wake to.

  • I use it as my primary alarm clock

    by Terry Murray

    I like the simple was to set the wake up time, the snooze, and the statistics of how well I did or did not sleep. It's simple and works well!

  • Love it

    by Danielitahhh4

    Is pretty awesome. White noise to fall asleep as well as the waking up times help you feel refreshed. Its pretty cool to see your sleeping patterns displayed.

  • LOVE


    This app is amazing.I have had no problems with it good alarm sounds to get up to and it shows u how u slept which is pretty cool!!

  • Cool alarm clock!

    by nikoono2009

    I use it every night and I love it.

  • Not bad.

    by McKizz

    Works pretty well. Alarm could be more "abrupt" for us heavy sleepers.

  • Strongly recommended for a better sleep

    by Virgilio Alberto

    This app has helped me sleep better and wake up much more pleasantly.

  • Great sleep app

    by Sempangi

    I use this app every night and enjoy the white noise to help me fall asleep. I highly recommend it.

  • Best in class!

    by Badad888

    I have used Sleep Timer before but this is slightly better thanks to the heart rate connection and better graphics. Thanks

  • …where did it go?

    by Paperhair

    I set the alarm, the alarm goes off, I turn off the alarm …no history!

  • Love It

    by PCAM215

    I use it every night to see how well I've slept.

  • Pretty good app

    by sweetsunbeam1

    I would recommend this app :) It works rather well as am alarm clock and so far it hasn't glitched to the point of not waking me up in the morning which is a big plus. I like how it gently wakes you up and records your sleep patterns. It's about 80% accurate on the sleep pattern records and it's really cool to be able to look at all the data. It's worth downloading.

  • Sleep Time

    by CJohnson130

    This app is very accurate, wakes me up in my lightest moment of sleep so I don't have groggy mornings.

  • Better sleep

    by Sean Yoder

    Great app that seems to allow for softer wake up and better sleep. Always wake up feeling refreshed. Only complaint is a lack of nap mode for short intervals.

  • Great!

    by Cydni70

    So far, I like it. At first I was surprised when I read you have to lay it face down on your bed but that isn't a big deal. I sleep with it under my pillow and it works just fine. : )

  • Great alarm

    by Natron2112

    If nothing else, this is at least a great alarm that wakes me up better than those other super-jarring alarms. Lots of other great features, too

  • Very cool

    by J9582

    Love the way it breaks down sleep patterns it's very accurate

  • Sleep Time, Works for me!

    by BOIkid55

    The previous version would not work with my LifeTrak and it was frustrating. I was changing my life style in order to fight migraines and I needed a complete tool To include sleep monitoring. Sleep Time allows me to see where and when my patterns are being affected. Good app!

  • I'm hooked

    by Deanna Gillingham

    I've been using this app for months now and I never want to go back to an old fashion alarm clock. I never was a morning person, but since using this app I wake up easily. No more being awaken out of a sound sleep. Instead I am gently awaken from a light sleep. I love it!

  • Now deleted nights

    by Jimmy Dice

    The app is pretty great- monitoring sleep every night. The rem and awake is fairly accurate, however the latest updates deleted months of users data and now will only store a few nights making real stats useless. It's pretty much just a demo now with no warning

  • Works like a genie!

    by Villain_89

    It works, and works well

  • ...

    by See Doo

    Love this app!

  • Great app!

    by Cheatlover

    I love this app! I never wake up feeling tired anymore! It's great!

  • More than 5

    by Robodogfreak72

    You finally realized that you can store more than 5 sessions. I hate that it stores only 5 but that doesn't mean I'm going to buy it...

  • Great but...

    by cfeen

    Snooze button doesn't work at all. It picks up touch but doesn't do anything.

  • Very effective

    by Farmbait

    I love this app. A friend suggested it to me and I couldn't wait to try it. I am in no way a morning person, but with my current schedule I needed to be able to get on a steady sleep pattern and be awake and alert in the mornings, and this miracle app helps me do just that.

  • Fooled apparently

    by Gzpzzr

    I had thought this was a great app. I felt like I slept better when using it but lately had felt less so. Then last night went to sleep with Soundscape. I got paged at 2:30am, got up called back on my phone(same phone running the app), got dressed, drove to work. I dealt with a few things there and then went to sleep. I had forgotten that the app was still on so at 6:30am the alarm went off. When I reviewed the log, it revealed the entire period from 2:30am to 4:30am as light sleep and final report was 96% efficiency!!! Talk about useless but with good placebo effect!!

  • A life-saver, 4 stars.

    by Djijji

    Sleep Time is an absolute lifesaver. It helps me to wake up feeling less groggy than ever! However, the alarm does not always manage to wake me up all the way: the downside is the lack of obstacle to shut off the alarm - as a heavy sleeper I frequently shut off my alarm without even realizing and going back to sleep. An option to have an obstacle, be it a simple math equation or a word question/puzzle (what day of the week it is, etc.) would make this app absolutely perfect.

  • Better quality of sleep and life

    by iUserGuy

    This app has helped me get more sleep, better sleep, and also a better quality of life. What a difference it makes when you don't wake up feeling groggy and tired. I recommend this app and I thanks the person that told me to try it. A++

  • Great app

    by Darwin Damba

    No complaints

  • What happened to crickets????

    by KyleJ22

    App is great. But why did you get rid of the crickets alarm tone? Is it available with the paid version?

  • Awesome

    by Rube1billion

    Love it. Really helps regulate my sleep and waking cycles

  • Snooze?

    by NCIS Special Agent J.

    I love this alarm clock! But with the update the snooze is gone! Someone wanna help a fellow sleeper out?

  • Great app - beware of data drain

    by Vid1234

    This is a great app that I use to see how well I sleep. It uses the accelerometer to see how much you move which is somewhat correlated to how well you sleep. The only issue I have with the app is that it is a huge data drain on my phone. I was using 4-5 gigs before I removed the apps data privileges. Now I'm down to 1 per month. Great app but I don't know why it needs my data usage?!

  • Sleep time app

    by RainbowNarwhalinTehHouse

    This app is so cool!! I wonder how it works

  • Awesome App!

    by NaomiBeads

    This App is truly amazing. It always works and even though I wake up very early I feel well rested. I no longer fall asleep in class or have to go to sleep at 8PM. I highly recommend this. Thank you sleep time!!!

  • Awesome App!

    by NaomiBeads

    This App is truly amazing. It always works and even though I wake up very early I feel well rested. I no longer fall asleep in class or have to go to sleep at 8PM. I highly recommend this. Thank you sleep time!!!

  • Please return the crickets

    by Phillypride10476

    Loved this app; however, this morning I was surprised when I awoke to something other than the crickets I was used to. Please bring back the crickets.

  • Sound

    by Steve Atl

    The updated version has a weaker sound alert. I hope your a light sleeper because that baby weak sound is stupid and was a terrible idea. Please brink back the more noticeable louder alert. In the mean time I will look for another app.

  • Great app!

    by KatL91

    It really helped me get my sleep schedule in order and I feel much better when I wake up!

  • Stopped working

    by Jessicafang0819

    It stopped working after a month, but I used this app everyday during this month. It's a shame that it just stopped reacting..

  • Great!

    by Person extravaganza

    This app is amazing I love being able to see how deep my sleep was. The only downside is finding a way to keep your phone charged and have it lay on your bed but that is the ONLY bad thing about this app!

  • Love it

    by Kaykaylovesu!(:

    I realize I need more sleep!

  • Works well.

    by Dragonballgt48

    Great overall. Sometimes the quick off feature doesn't work.

  • Needs a little something

    by KB623

    Great app I use it almost every night. The only problem I have with it is that if u don't want to spend your money on it then you have very limited things. Like you only have one sleep noise the ocean. So really all I would rather is a little more things open for the people that don't want to pay.

  • Great app!

    by Nat Korch

    It really worked!

  • Cool alarm clock.

    by nikoono2009

    I use it every night and I love it!

  • It's ok

    by Jeny Lane

    I think this app is ok. I like the graphs & percentages, and also the soundscapes. I wish you could set how long it takes you to fall asleep, sensitivity, and extend the wake up phase to 45 mins.

  • so far so good after 3 days

    by Carrollsat2013

    I've felt great waking up in the mornings.

  • Great!

    by Eagleeye200

    It really helped me wake up on time and I really like the how you can see how long you slept :)

  • Sleep time

    by Swimma

    It's amazing I love it

  • Pshat

    by Tallon8888

    Good stuff!

  • by No Support! Poor Audio!

    I installed this app and was really surprised it works! The alarm woke me up a little early but I woke up refreshed for the first time in months!

  • by Quizzicallity

    Love this app

  • Alarm sound is nice

    by Gmtwozero

    Positive experience for the past 4 months.

  • Awsome

    by T-four

    It is an awsome and accurate app

  • I like it

    by BookwormBev

    Good to be able to check on quality of sleep.

  • Great alarm clock!!

    by travelinwild

    This works really well and seems to be pretty accurate! It might me in my head but I wake up feeling a better than before!

  • Wonderful!!

    by Akepleigh

    I've been waking up so much easier since using it. I love it!

  • Very good app

    by Betty collia

    I really like this app. It works for me.

  • Great to help me wake up more rested

    by Nancee428

    I was always waking up still very tired. This app helped me understand my sleep pattern better and woke me up when I was sleeping the lightest so it was easier to get up. Was amazed at how well it measured my sleep

  • Best Alarm App I've Found

    by Saddened Daily Burner

    I'm an extremely heavy sleeper, often oversleeping my alarm or snoozing an outrageous number of times. So far this app has woken me up within 5 minutes of when I need to be up -- no later. My mornings are a lot more energized! Even after only 4 hours of sleep, I've felt more rested after waking up with this app than I've felt after many nights of 10 hours before starting to use it. Idk how it does what it does, but I've greatly benefitted from the use of it!!

  • Awesome

    by Tkup

    This is a great app. I've been very impressed.

  • Only showed daily log for the first day.

    by Cakebaker2011

    Waste of time after that.

  • Use it every night

    by Margie Pratt

    I love love love this app. I only wish that I had more information as to what the cycles mean to my overall health. It has helped me to make sleep a priority.

  • Great! Can you do more?

    by p6fam

    I think the app does a perfect job at what it's designed to do, but I think there is more. I think there should be a functionality added that analyzes your sleep cycles and tells you when the best time to go to sleep is in order to wake up at the selected time. I don't know how much research has been done on this, but I expect it would not be difficult.

  • well done

    by Zhang Debo

    It wakes me up at the right time. Painless!

  • Great App

    by Slmather8

    I love the soft sound of waves as I am falling asleep, the alarm is nice it gently wakes you instead of startling you awake like other traditional alarms. I use it every day, I would highly recommend this app.

  • Big Daddy MacaDangdang

    by ZZ Topp

    Works great.

  • Great app

    by Darlene Conrad

    Awesome way to see how much you ACTUALLY sleep. Very interesting and simple to use. Keep up the good work!

  • Excellent

    by le reddit bravery

    Well done!

  • best alarm clock for deep sleepers!

    by Jules6_35

    I have always needed at least three alarm clocks to be set in order to make sure I am not late. This app is has been amazing. I love getting the information, it is waking me up at my lightest because I've never felt this awake when getting up. It's definitely helping me regulate my sleep and get in some good habits. I've only used it for 5 days and I'm starting to wake up before my alarm goes off! Awesome!

  • Great app!

    by Beccababy45

    This app does a really great job of waking me up in the morning. I'm always excited to look at my sleep cycle, so it helps me stay awake too. I think it looks accurate and is very interesting. I definitely recommend it!

  • Get this app!

    by Ztactical

    This app is awesome! I never wake up groggy anymore but feeling well rested.

  • Great app

    by SSPony30

    I use this app daily. Love it.

  • Thanks for this App

    by TheJPD

    I have been using this app for the past year or two, & I rely on it to wake me up. I don't bother with regular alarm clocks any longer, except as a backup for waking up for something very important. I am more awake when I wake up when this app's alarm tells me to. I just wish I didn't have to leave it on all night to work properly; I usually have no battery power left by the morning.

  • Has made waking up a better experience.

    by NachoLlama

    Try it out I think you will be surprised.

  • Best alarm ever!

    by Bartthegoodpuppy

    This app is so easy to set. The information that gives you on the quality of sleep is priceless so you're able to adjust your sleep routine as needed. I hate loud buzzing annoying alarms and this app allows you to wake up with softer sounds such as crickets which is what I wake up to. Totally recommend!

  • Yessss

    by Kibosh17

    This thing is awesome! I'm a habitual snoozer and this app is a great tool to wake up easy (not jarring) with the added benefit of multiple snoozes without disturbing your napping partner!

  • Great

    by Fhponton

    Since using the App I feel more awake during the day and the best part I don't need the spend money on an energy drink to give me that extract boost because I am much well rested!!

  • Awesome

    by Mistifys

    I love this app. The fact that it is able to study your actual sleep habits is neatest thing. Everyone should get this one.

  • How does it know? Amazing!

    by 777Java

    It actually works as advertised. Even with my wife only inches away, it follows my sleep patterns, not hers. I'm also a long haul pilot, 15+ hour legs, and this works perfectly with my breaks.

  • Very Impressed

    by DjBizerk

    It works the way it says its supposed to and has taught me my sleeping habits along with improving my sleep efficiency. I recommend this app to everyone.

  • Wake up refreshed

    by think of a Nick name

    What else more do you need?

  • :)

    by coreaKim

    I download just for fun. However, it's really good. Physically..don't know, but feel good^^ So I leave 4star, 1star is about alarm sound which is not enough Anyway, thanks

  • Love it!!!!!

    by Gymmomofthree

    What a gentle way to wake up.

  • Sleeping app

    by ppamerican

    It's a great app to learn more about sleeping patterns and healthier sleeping.

  • Good!

    by Ke012

    Good app! I like it a lot & It really helps me to keep track of my sleep hours.

  • Very Nice

    by Audrey3201

    I'm addicted to seeing my sleep stats now!

  • View More


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