I have an Android app, RVChecklist, that is free. It is not specific to a Roo, but is relevant for any trailer/camper. And did I say it's free?
2016 Roo 21SS
2005 Ford Excursion-Sherman
Mods so far:
PI hardwired EMC, Wire Shelving in wardrobe
Plexiglass screen door protector, Blue LED Wine nook
stairs, and counting...