Sleep Time: Cycle Alarm Timer 4+

Dream, Bedtime, & Nap Tracker

Azumio Inc.

    • 4.7 • 5.3K Ratings
    • Free
    • Offers In-App Purchases

iPhone Screenshots


Fall asleep, stay asleep, and wake up refreshed!

Sleep Time doubles as a comprehensive sleep analysis app and alarm clock. Celebrating the release of version 2.21, Sleep Time is the first sleep app with iOS 8 support and Apple Health integration!

With over 35 million users, the award-winning Sleep Time app is all over the web.


“Azumio has fulfilled the need for an accurate, state-of-the-art algorithm for sleep analysis that is consumer-accessible as an integral part of a complete mobile health solution” - Dr. Paul Zei, Stanford University

5/5 “I’ve tried several apps that log the amount of sleep and the types you experience, and the interface of Sleep Time is the best by far. It’s easy to understand and simple to use.”

5/5 “Fascinating results. It works remarkably well providing helpful information.”

Featured on: TechCrunch, Mashable, Lifehacker, 148apps, eHealth, and many others...

#1 Sleep Analysis app in United States
#1 Sleep Analysis app in Japan
#1 Sleep Analysis app in United Kingdom
#1 Sleep Analysis app in Australia
#1 Sleep Analysis app in Germany
#1 Sleep Analysis app in France
#1 Sleep Analysis app in China
#1 Sleep Analysis app in Russia
#1 Sleep Analysis app in Canada
… and many more.



√ Set the alarm clock with a single gesture

√ Fall asleep to soundscapes or white noise!

√ Alarm rings even in silent mode

√ Choose from any of our 20 built in alarms

√ OR wake up to your favorite song from iTunes!

√ Sleep Lab™ with sleep cycle analysis

√ Detailed monthly and weekly graphs

√ Advanced wake-up optimization algorithm

√ Instant Heart Rate integration to detect pulse after waking up

√ Full history and graphs make comparison easy

√ Backup and restore your sleep data on the cloud

√ No glasses needed for our easy to read interface!

√ Apple Health Integration

We make Sleep Time for our users and we’d love to hear your feedback – tell us what you think so we can implement your ideas and suggestions in the next update!

Upgrade to Premium to receive unlimited access to Premium Programs and Playpen Freeplay workouts, HD videos, dynamic and motivational audio, workout email summaries with tips and advice on healthy living, priority support, and more for $9.99/month or $29.99/year through renewable iTunes subscription.

We offer auto-renewable subscriptions with the following specifications:
- Payment will be charged to your iTunes account at confirmation of purchase
- Subscription automatically renews unless auto-renew is turned off at least 24 hours before the end of the current period
- Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase
- No cancellation of the current subscription is allowed during active subscription period
- Any unused portion of a free trial period, if offered, will be forfeited when the user purchased a subcription to that publication
- Our privacy policy and terms of use:

Please note: Continuous use of GPS activities in the background can dramatically decrease battery life.

Sweet Dreams,
Azumio Team

What’s New

Version 5.416

Top sleep cycle application for over 10 years
- Track sleep cycle and sleep quality
- Sleep better with soundscapes
- Measure resting heart rate when you wake up

Your reviews and feedback are important to us! We read them daily to continually improve our application.

The Sleep Time Team

Ratings and Reviews

4.7 out of 5
5.3K Ratings

5.3K Ratings

Babynitagirl ,

Tracking & Awareness = Great Tools for Changes

Forget the other apps and go straight to ARGUS! I've tried them all & this app has changed my life and given me the tools to create a personal sleep hygiene. I've been dealing with chronic illnesses for several years now, prescription meds make it difficult to rest and antibiotics have terrible side effects. I've tried several sleep tracking apps & I love ARGUS because it integrates with other apps I use. I like the layout & the feedback. I set it immediately when I get in bed and like to know WHEN I get in bed, and I love the tags I can customize before each night's rest.

Because of this app I've realized I have a "sweet spot" for sleep and it's 6 1/2 hours. I also have figured out that this only applies to my quality sleep when I go to bed before 11pm. If I sleep longer I'm not necessarily more rested - it's usually a flag for an infection. I have a chronic illness so this is incredibly useful data to me so I use it pretty religiously.

I love that it integrates with my other ARGUS programs, and prompting me to take my heart rate upon rising is a wonderful bonus tracker.

ameristar ,


This is a fantastic app that very reliably lets you set an alarm while giving you a real time indicator of how much sleep you’ll be getting.
The log, when consistently used, gives you a good indicator of how much sleep you get over a certain period. While it’s a nice idea to sleep with it in your bed because of the accelerometer keeping track of your tossing and turning, I find it to be kind of restricting when I charge it while I sleep, as well as being a temptation to browse the Internet instead of sleeping.

If you’re like me, and knowing the ins and outs of your REM cycle aren’t a big deal to you, when on a side table the alarm works just fine. The song gently raises in volume, isn’t jarring, and isn’t a ring tone that will ruin your day if someone’s phone randomly rings with the same chirp. (Is that just a me thing? Because I’ve definitely had that happen in years past.)
My only qualm is that it can be a bit annoying to have to circle via touch a time clock to get to the time you’d like, down to the minute. I’d love a manual function that lets me just input a time, but that’s just a nitpick. I have a slight hand tremor, and yes, while it seems a bit whiny, sometimes I’d like to wake up at 8:15 and not 8:12, thank you very much. Three minutes makes a difference! Other than that amazing app.

Lovinthisgame73 ,

Used it for over a year now

I really love this app. I have the free version, but I don't really miss the pro features. I still set a backup alarm, but I've always done that no matter what primary alarm I used. It automatically turns the volume on your phone all the way up, and even if your phone is on silent, it will go off at full volume in the morning. This is great, because there have been times with other apps when I'll accidentally leave my phone on vibrate so the alarm won't go off in the morning. It also doesn't use that much battery, so I don't have to plug it in at night. If I charge to at least 70% before I go to bed, the battery life lasts me all night and through the next day. I cannot speak for the accuracy of the program, I just like that it monitors how often I sleep and wakes me up more gently. I really like it, and would recommend it!

App Privacy

The developer, Azumio Inc., indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Used to Track You

The following data may be used to track you across apps and websites owned by other companies:

  • Identifiers

Data Linked to You

The following data may be collected and linked to your identity:

  • Health & Fitness
  • Location
  • Contact Info
  • User Content
  • Identifiers
  • Usage Data
  • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Wallet

    Get all of your passes, tickets, cards, and more in one place.

More By This Developer

Argus: Step and GPS Tracker
Health & Fitness
Instant Abs: Workout Trainer
Health & Fitness
Glucose Buddy Diabetes Tracker
Calorie Mama AI: Diet Counter
Health & Fitness
LifeCoin - Rewards for Walking
Health & Fitness
Sleep Time+ Cycle Alarm Timer
Health & Fitness

You Might Also Like

Sleep Timer – Smart alarm
Health & Fitness
Sleep Calculator Pro
Health & Fitness
Sleep Tracker - Sound Machine
Health & Fitness
Sleepzy - Sleep Cycle Tracker
Health & Fitness
Health & Fitness
Sleep Science Alarm Clock