Ask HN: Please review my friends startup - reminderdiary.com

Hi Guys,

I've given my feedback but would appreciate your thoughts, his questions to me were...

· Are missed appointments my biggest market or should I be concentrating on other things?

· Do businesses know this is a good way of stopping missed appointments? Are they searching for it? If not how do I reach them?

· What type of businesses should I be marketing at?

· How should I be increasing traffic to my site?

Additionally as a bit of further information he has achieved some traction with some monthly paying clients, I think his problem is whether this can scale.