![Sleep Cycle on Twitter: "@Absolutely_Lucy Warning few movement might mean you need to clean out that microphone of yours. Or it just means you're a great sleeper." / Twitter Sleep Cycle on Twitter: "@Absolutely_Lucy Warning few movement might mean you need to clean out that microphone of yours. Or it just means you're a great sleeper." / Twitter](https://pbs.twimg.com/media/DxbnytoXgAAUTfO.jpg)
Sleep Cycle on Twitter: "@Absolutely_Lucy Warning few movement might mean you need to clean out that microphone of yours. Or it just means you're a great sleeper." / Twitter
yan on Twitter: "as someone who doesn't yet own a wearable tracker, i tried the Sleep Cycle iOS app last night with accelerometer only, microphone disabled. the results seem surprisingly accurate https://t.co/TXpO6vQgBo" /
![yan on Twitter: "as someone who doesn't yet own a wearable tracker, i tried the Sleep Cycle iOS app last night with accelerometer only, microphone disabled. the results seem surprisingly accurate https://t.co/TXpO6vQgBo" / yan on Twitter: "as someone who doesn't yet own a wearable tracker, i tried the Sleep Cycle iOS app last night with accelerometer only, microphone disabled. the results seem surprisingly accurate https://t.co/TXpO6vQgBo" /](https://pbs.twimg.com/media/D3uyva4U0AARlXB.jpg)
yan on Twitter: "as someone who doesn't yet own a wearable tracker, i tried the Sleep Cycle iOS app last night with accelerometer only, microphone disabled. the results seem surprisingly accurate https://t.co/TXpO6vQgBo" /
![Not so) Smart sleep tracking through the phone: Findings from a polysomnography study testing the reliability of four sleep applications - Fino - 2020 - Journal of Sleep Research - Wiley Online Library Not so) Smart sleep tracking through the phone: Findings from a polysomnography study testing the reliability of four sleep applications - Fino - 2020 - Journal of Sleep Research - Wiley Online Library](https://onlinelibrary.wiley.com/cms/asset/9e32133a-43a9-4e35-b534-a423a8dcc6f9/jsr12935-fig-0001-m.jpg)