I thought sleep cycle length is variable to an extent. I once calculated my own to be around 110 minutes per cycle, rather than 90 minutes. Using that as a base

I thought sleep cycle length is variable to an extent. I once calculated my own to be around 110 minutes per cycle, rather than 90 minutes. Using that as a base for calculating bed time has worked well for me. If cycle length variability is indeed a thing, it would be an interesting parameter to add to the calculator. Thanks for sharing!