A voice recorder for an iPhone or I give a business idea?

Question

iOS

I needed to record interesting lectures and unexpectedly found out that normal free audio recorders for iPhone are somehow not visible ...
BlueFire seems to “lose” the recordings made, while other recorders do not allow you to save the mp3 recording to the folder of sounds and send it by email. Some, instead of a pause, allow you to press only stop, when you press start again, the previously recorded is overwritten. I don’t talk about the recording quality, filtering, sound activation functions (automatically cut out silence), the ability to work when the screen is locked (so as not to accidentally press stop), the display of the signal level indicator and the recording time.
So it seems that this is still an unplowed field, take the idea: make a NORMAL audio recorder. By the way, in order not to reinvent the wheel, look at how it is done on hardware Olympus.
If it is free, with monetization through advertising, then in general super success is guaranteed.

Answer 1

Pocket WavePad - free, writes audio, has an editor, you can cut, remove noise, turn up the volume, etc. Compresses to mp3 and other formats. In general - I use it myself, it's a great thing.

Answer 2

What's wrong with the standard one? Is there a set of criteria?