Webcam app

[n0m0n]

Hello,
I recently purchased a Zmodo 4-Channel DVR Surveillance System and was hoping to find a app that would let me monitor on my iPhone4s when away.
I have been looking for a application that will allow me to the webcams as well.
I was hoping to find a app that has is capable to operate with my PC device as well as on my Mac devices as well.

Does anyone know if there is a app that can work on both platforms was well as on the DVR surveillance (DVR says that it has network capacities).

Thanks