You can't upload history. Not much point anyway as only past 30 days worth of data are kept.
No rainfall data is available. It's ingested but not available. Perhaps it will in the future.
Not sure about pressure on mobile. Maybe someone else can answer that.
Weather upload interval will update after 1 week.
One good use for that would be a temperature outlook, because now I could use the arrow keys to view temperature on different days but on the same selected time. Whereas currently it's more useful if you want to see temperature in upcoming hours, not days. That's because it's hard to see the big picture because of temperature varying too much..
Vse perfekne funguje je to fakt parada - DEKUJI ZA VSECHNY KITE&WINDSURF PRIZNIVCE, snad jen moznost zadat metriku do odkazu viz napr. https://beta.windyty.com/48.733/14.130?gust,48.933,18.688,7 na mobilnim telefonu se hure dostava do Settings.