Hi, and welcome to the forum.
Now the program under development and does not represent anything outstanding, except for a couple of interesting ideas on the architecture of the sound wave. A small program for musicians and sound engineers. How many people it will attract - I find it difficult to answer. I'm just a novice programmer.
Sounds interesting, I like to create music, and into sound waves, synthesiser, harmonics etc. What will your app do exactly, enable the creation of custom waveforms.
One way would be to put limitations on audio files for trial version, by limiting the quality of the output waveforms.