Pretty much all smartphones come with a clock app. This app allows users to create timers, countdowns, and alarms. It’s simple and it works, or at least it does for phones other than the iPhone.

If you're a very heavy sleeper, you already know a regular alarm clock usually doesn't get the job done, and phone alerts or easygoing sunrise alarms don't rouse those who are deep in an REM cycle, ...

This article is a part of CNN Underscored’s Guide to Sleep, a weeklong focus on everything you need to sleep better. We’ll be featuring new products, tips and exclusive deals all week, so check in ...

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Waking up to a loud alarm on your smartphone is not a fun way to get up in the morning. Plus, there’s growing evidence that having a smartphone in the bedroom may be wreaking havoc on our sleep. This ...