The website looks nice (but Lobster is a little overused at the moment).

Your idea is good, but not great, not £1.99 great.

If it were free, it'd be awesome, if it was 69p I could see a very very very small niche for it but what you're asking is that me and my friends each pay you £1.99 so that we have another way of nagging each other to get tasks done.

Ask yourselves "what value does this bring to people?".

Would be cool to try it out though! Maybe you could find a way of selling 5 licences at a time or something for £1.99, so that I get one and get 4 to give to friends?