Back in 2010, I was looking for an alternative to Quicken that is 1) simple and without fluff 2) designed elegantly like my Mac. I couldn't find any, so I set out to create my own.
MicroFounder
How did you find your first customers?
David Lynch
I was lucky in that my Mac app launched at the same time as a the Mac App Store, and immediately, I was earning $3-$4k a month. That level of sales didn't continue however.