Amazon.com: Withings Sleep - Sleep Tracking Pad Under The Mattress With Sleep Cycle Analysis : Home & Kitchen
About 2 weeks using "Nokia Sleep" which can confirm the sleeping time automatically by checking the smartphone Sleep cycle analysis · Tracking heart rate · Snore detection · IFTTT cooperated review - GIGAZINE
Nokia's sleep tracker can dim the lights and warm up the room
Withings Sleep review: same hardware, better software - The Verge
Withings Sleep tracking mat review: A no-maintenance sleep tracker