stuff·finder is an app for your home inventory. You note which box a thing is in, and then you find it by search instead of digging through the attic.
Garage▸Shelf B▸Box 3 Get it on Google PlayAndroid · free · no sign-up

Search by name, tag or room. The answer shows the whole path: room ▸ cabinet ▸ box.
Print a sheet of labels, stick them on the boxes. Point the camera — see what is inside without opening it.
Shared access by invite: one person puts it away, everyone finds it, from any phone.
Your things live on your phone and work offline. Email is needed only when you want your family to see the same boxes.