It’s a pretty no nonsense app as far as I can see and cheap too. Plus it’s universal. If SoundFonts are your thing, this will be worth more than a cursory look.
Details … (such as they are)
iSoundBank is a sound bank player for SF2 and DLS format files.
- Build in a GM sound bank.
- import and load SF2 and DLS.
- MIDI In available (From Core MIDI devices or virtual MIDI In)
iSoundBank costs $0.99 on the app store: