Yes, Developers and Investors Are Really Different
numeratechoir.com
numeratechoir.com
In my experience it can be hard to sell -- you're often stuck explaining to someone why they suck at their job.
1) Productivity software is not something that is likely to spread rapidly (and cheaply) like a social network or a game. Unless you can pull off something new and clever, it's likely you'll need to pay for users. 2) It's tough to make it monetize well: it isn't something big companies tend to pay for, and it's still relatively unusual for individuals to pay for it.
That's a tough combination. May change, but I can see why investors are skeptical.