I agree that there are way too many variables to make a 'one size fits all' app. However, the issue of different tolerance levels was addressed in the last line of the post: "It also lets you change the 'optimal' and 'sleep' values if you're particularly resistant or weak to caffeine."
Does it allow for those of us who needs coffee to sleep?
I grew up in a culture where 7 cups a day was average, which, when accounting for those who don't drink coffee, meant 10-12 cups a day for coffee drinkers. Often including a bedside mug. Then I moved to the US, where people have a belief that coffee can make them unable to sleep, and that's when drinking making-love-in-a-canoe coffee. I think it's at least partially psychosomatic - people get restless from coffee because they expect to, and because it's a pick-me-up in the morning, they believe it's also going to wake them up if drunk at night.
Sure, caffeine is a stimulant, but American coffee has extremely low doses. The theobromine in a cup or bar of chocolate is more of a stimulant (never mind the sugar), and they don't seem to have the same belief about chocolate keeping them awake.
Sure, I have probably built up a tolerance, but I didn't have any problem with coffee keeping me awake when I started drinking it either. About a pot of strong coffee a day during summer at age 14, and I slept like a log. Nobody told me I would have problems sleeping, so I didn't.
midnight madness john henry john henry zack greinke zack greinke siri san diego news
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