I like it. It's simple and it's obvious that you've followed all the SOP for a landing page.<p>If I were you, my very next step would be to make a scalable way to create a similar landing page for a TON of niche reasons why people would need reminder phone calls. You should be able to come up with at least 50, just sitting in an empty room with a notepad. Have you done google keyword tool research to see what people who search for voice reminders are searching for?<p>As I'm writing this, I'm thinking: "Yes it's an iphone app, but there's really nothing iphone specific about the technology." It's the iphone your angle? What about all the other mobile devices? What about a web-service? What about a number people can call from a dumb phone, and then enter in the reminder number using their keypad, and leave an actual voice message for the future?