Research shows that waking up to an alarm clock triggers a sequence of unnatural and unhealthy involuntary physical responses.
Research shows that waking up “naturally” is gentler and safer for the mind and body.
Healthy alarm clock is a little better than normal alarm clock:
. Play short and soft alerts ahead of your alarm time
. Just wake you up a little for four times, you don’t need to get up or press any button
. All alerts and sounds are fade-in, not suddenly
. Can select various alerts and sounds
. Good performance and energy saving, just like the system clock