The DayDay blog
Notes from
DayDay.
Why we build our apps the way we do, and the research behind each decision. Every post lists its sources. None of it is medical advice.
Ignore Today’s Weigh-In. Watch the 7-Day Line.
Your weight can swing a kilo or more overnight without any change in fat. Here's what moves the scale, and why Forward leads with a 7-day average.
· 3 min readForward · weight loss
No Streaks, No Red Days: Why Missed Days Don’t Count Against You
Streak counters make one missed day feel like failure. Forward doesn't have one. Here's the research and the small design choices behind that.
· 2 min readForward · weight loss
Why Forward Says “About 250”, Not 250
Calorie numbers come with error bars nobody shows you. Here's where the uncertainty comes from, and why we put a tilde in front of every number.
· 3 min read