Hey, there aren't any apps for mastering. Could you make an app for mastering? Specifically? With the new iPad phaps you could raise the quality a bit to 32 bit optional.
I'd like to see presets for mastering, an analyzer to analize specific parts and traits to make a preset which you could then adjust, the ability to rearrange effects, and generally more advanced options than multitrack daw offers. Multiband compression, brick wall limiter, exciters, the reverb effect, graphic EQ, and things of the like. It could be simple enough for beginners, but with advanced options for advanced users. Any, I'd buy it. Just an idea.