Apps like Circadian: Your Natural Rhythm

Here are some great alternatives to Circadian: Your Natural Rhythm by Natural Cycles :
Arcashift: Sleep & Balance
Arcashift: Sleep & Balance
★3.9
Alarm Clock - Timer - Reminder
Alarm Clock - Timer - Reminder
★4.4
Calm Sleep Sounds & Tracker
Calm Sleep Sounds & Tracker
★4.2
Biorhythms - Biological Cycles
Biorhythms - Biological Cycles
★4.9
LifeCycles
LifeCycles
★4.0
Biorhythms and Critical Days
Biorhythms and Critical Days
★4.5
Time4Sleep: Sleep Cycles
Time4Sleep: Sleep Cycles
★3.9
My Biorhythms
My Biorhythms
★4.6
Sleep as Android: Smart alarm
Sleep as Android: Smart alarm
★4.6
Sleep Hours Alarm
Sleep Hours Alarm
★3.8
Sleep Calculator
Sleep Calculator
★4.1
Gentle Wakeup: Sun Alarm Clock
Gentle Wakeup: Sun Alarm Clock
★4.7
Sleep Easy
Sleep Easy
★3.3
Sleep Cycle: Sleep Tracker
Sleep Cycle: Sleep Tracker
★4.3
Alarm Clock for Heavy Sleepers
Alarm Clock for Heavy Sleepers
★4.4
Sunrise Alarm Clock: Wake up n
Sunrise Alarm Clock: Wake up n
★4.0