

It has an alarm mode that will wake you up during the most opportune part of your sleep cycle before you have to get up. It can suggest times to go to bed based on your sleep stats to make sure you get enough quality sleep, and play sounds that might help you fall asleep. It will record noises at night while you sleep, and you can listen to them later in order to see if you’ve been snoring or if it was the cat that woke you up. Pillow’s got a few other handy features, too.

It’s all presented in simple and clear vertical bar charts. Turning your phone sideways to landscape orientation changes the view to show detailed information about a bunch of your sleep data over time. Pillow’s app interface is more friendly than AutoSleep’s, but it doesn’t provide as much data. You can see what percentage of your sleep time was spent awake, in light sleep, in REM sleep, and in deep sleep. Tap that chart and you get more detailed info, including your total time asleep and a measurement of your sleep quality. Pillow’s main interface shows a couple of sleep activity rings, followed by a simplified chart of your last night’s sleep. Pillow is made to track sleep for anyone with an iPhone-by placing it on your mattress, an iffy proposition if you share a bed-but we’ll focus on its Apple Watch functionality here. Pillow, thanks to a few features added in recent updates. AutoSleep’s top spot has been slightly edged out by
