Blog
The research behind the apps, how things work, and what I learned along the way.
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How to tell if a habit is actually working
A streak shows you did a habit, not whether it helped. Compare the days you did it with the days you didn't, and check the day after. Here's how.
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Should you store a battery full or empty?
Neither. A lithium-ion battery left at 100% slowly loses capacity, and one left at 0% can die outright. Here's why, and how to store one for months.