Next door have, I start one too.
Just to share, maybe you guys know it already but I still
share.
For arrival, I use my iPad to be a sign, use the App called
Limopad.
For my invoicing, I use invoice2go.
Sleeping disposals, I use the app qvod player.
Try it.
for andriod phones can use LimoTab... same function as Limopad. but
of course better use with galaxy tab lah.. haha for flights i use
SG Flight (andriod)