It reads the day, not your diary.
No check-ins to fill out. Rainfall notices the shape of your day and reflects it back as weather.
What it reads
From signals already on your iPhone — how long you slept, how packed the day looks, the rhythm of it — Rainfall infers a mood and names it as weather: clear, partly cloudy, overcast, foggy, windy, pressure building, or rain. Nothing to log, no mood to rate. You open the app and it has already noticed.
It shows its working
Every read comes with the why. “A shorter-than-usual night. Your sky's foggy.” You can see exactly what it picked up on and how it got there — never a black-box score that asks you to just trust it.
You have the last word
Read you wrong? One tap on “How would you put it?” sets it straight, and Rainfall takes the correction to heart. The weather is the start of a conversation, not a verdict handed down.
It never leaves your phone
All of this is computed on-device. Your day, your patterns, your corrections — none of it is uploaded, and there's no account to make.
Feelings are weather. Weather passes.