ranabd,
There is no native iPad/iPod application. You access SambaPOS via Remote Desktop with these devices. I think you missed what was in the post.
SambaPOS is strictly a Windows Application. So for multi-terminal setups, you either install SambaPOS on each terminal, or if you are using other devices, like an iMAC, iPod, iPad, Android device, you must run a Remote Desktop application and RDP into a Windows Terminal Server. The Terminal Server can be Server 2003/2008/2011 or Win 7 Terminal Server Patch.
For small screen devices (iPod) you run Samba.Presentation.Terminal.exe instead of Samba.Presentation.exe and use an RDP client like PocketCloud.