PrimeNap: Free Sleep Tracker

Contains adsIn-app purchases
3.7
2.31K reviews
100K+
Downloads
Content rating
Everyone
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About this app

Improve your sleep quality with PrimeNap, the free Sleep Tracker and Smart Alarm App.

PrimeNap also features a screen dimmer, sleep statistics, snore detection, sleep sounds and a dream journal.

Features:
* Free Sleep monitor / Sleep tracker
* Data-export
* Sleep debt analysis
* Smart alarm / sleep cycle alarm clock
* Gradual volume increase
* Snore detection
* Easy snooze using multitouch, add 5 minutes per finger
* Screen dimmer
* Red filter
* Dream journal
* Sleep stats for user-specified daily activities
* Sleep sounds


Benefits of using a sleep tracker and sleep cycle alarm clock / smart alarm
With modern day work schedules, our sleep patterns have become widely irregular and oftentimes much shorter than they should be. PrimeNap's Sleep Tracker can help you analyze your sleeping patterns and correct them if necessary. Using PrimeNap's smart alarm functionality, you can avoid being pulled out of deep sleep by a well-meaning time-based alarm clock, and instead wake up gently after sleep cycle completion and thereby simulate a natural awakening.


How it works: Movement during sleep is known to roughly correlate with the actual sleep stages obtained by polysomniography. This sleep movement is registered by the phone and translated into fairly accurate sleep cycle information.

Recommended use: Use this sleep app with proper hardware. If convenient, switch on airplane/flight mode to minimize any emissions. Reboot or close other apps that might cause the phone to heat up during the night.


Frequently Asked Questions:
* How do you interpret the resulting graph?
- The graph is separated into two sections. The top section shows relative movement over time. Low measured movement will be a valley in the graph, high movement will be a peak in the graph.
The bottom section uses the movement information to calculate a rough estimate of your sleep cycles (numbered on top) and even individual sleep phases during each sleep cycle (Awake, Dreaming (REM), Light Sleep (Non-REM 1,N2), Deep Sleep (N3). The app uses the actual measurement (e.g. long stretches of low movement are likely to be deep sleep), averages (mainly in case of REM) and basic knowledge about sleep cycles (duration approx. 90 minutes) to create a reasonable best-fit hypnogram graph. This is why it will still show sleep cycles if the phone is placed on a desk. The app assumes that the user is actually sleeping.

* How is this going to help improve sleep?
- For most people best sleep is achieved through regular sleeping patterns (similar bedtime) averaging about 8 hours of sleep every day. The app is meant to assist people in finding out their exact sleeping patterns in order to make informed changes. The sleeping times are thus most important, the information shown in the graphs is mainly used by the smart alarm function.

* How do you add your own nap sessions if you forget to track them?
- On the third tab (Nap History) there is a button in the bottom right corner labeled "+1".

* How do you delete nap sessions?
- Click and Hold the nap that you want to delete. Select the corresponding item from the menu that will appear.

* How do you resume a nap session?
- Simply click the sleep button again to start a new nap. The app will automatically know that there have been previous sleep cycles and will continue there. Both sleep sessions will appear in the sleep pattern overview.

* What does the button "Phone off = Sleep" do?
- This is an option for people who turn their phone off during the night. If you turn your phone off completely, the app will count this as going to bed. Turning it back on in the morning is counted as waking up.

* What is "Wake Battery"
- This is a way of displaying the current sleep debt as a battery icon in the status bar. This needs adjustment and always sleep if tired.
Updated on
Mar 23, 2020

Data safety

Developers can show information here about how their app collects and uses your data. Learn more about data safety
No information available
3.7
2.31K reviews
A Google user
January 2, 2020
The tracking and charts of this app are excellent, but it'smarketing is deceptive and disappointing. I enjoyed using this to track my sleep modes, as the charts were informative and well laid out. However, after five months, all of the sudden it told me that "the trial was over" and would only record every other night. Now it won't record at all unless I buy it. Minus three stars for not disclosing that this is just a trial version with a fixed time limit. Time to find a new app for sleeping.
83 people found this review helpful
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A Google user
May 27, 2019
This app has the best features compared to others but the user interface is really bad and hard to navigate. It is confusing to use and the dates and day of week don't match most of the time I wanted to purchase the premium version but there is no information on what that entails. If the developer has UX assistance it could become the best in the market.
21 people found this review helpful
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A Google user
January 6, 2019
This is a good app for tracking sleep and has many useful features. I like knowing how much of each type of sleep I've gotten esch night. However, some features such as the wake battery are unexplained and it just seems to set to a number and buzz every so often as it counts down. I would really like an explanation of this feature. This app could further be improved if it showed what time you fell asleep too.
27 people found this review helpful
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