Most of ZumFlo is about recording what has happened: your daily log, your settlement, your records. The Insights tab does something different - it gives you your own numbers back in a way you can actually use. And the part that looks forward instead of back is Forecast.
The core idea is simple: based on your connected calendar, Forecast shows how full your days are, where you have room, and - perhaps most useful of all - what that room means in euros. An empty gap in your calendar becomes an amount, and an amount prompts action. Forecast is part of Pro and needs your calendar connection.