Looking for an app - job organiser with open input

Hi there,
I'm looking for an application for a friend of mine who isn't very organised.
On a typical day he may get around 10-15 job requests, where there is a client address, billing address, amount, details which will come in as calls.

Ideally I'm trying to find him an application where he can have on his phone, which he could manually update himself but also some kind of web interface where other could add in jobs - preventing the need to call in.

Any time a new job comes an alert to inform him of the job.

Does anyone know of anything like this?