I just received my Sleep Phaser which I ordered so I could track without a wearable. Now that sonar is available the Phaser seems moot. However, I guess the wake-up light might be useful.
Can I/should I use both the Sleep Phaser AND Sonar to track sleep, or should I only have one at a time turned on and turn off the other one?
Also, I sometimes use a fan pointed at the bed when it is warm, will that mess up the Sleep Phaser tracking?