I need a VOIP app that can make conference calls and record them.
You'll need the ability to make conference calls in your VOIP setup -
that's "server-side", not something you can fake with software.
Recording calls? Do you do your VOIP on the computer, or with a
phone-line instrument connected to a modem? If the latter, any
telephone recorder will work, including the ones that run on a
computer (through a voice/data modem or a phone connection card).