Adam, thanks for taking the time to answer. An iphone application has been a frequently asked feature from my users and I considered setting up an API for them

Adam, thanks for taking the time to answer. An iphone application has been a frequently asked feature from my users and I considered setting up an API for them to develop the iphone app. I don't like the iphone/ipad model (one-off sales versus subscriptions) but it is true that it would make my application more Premium. I haven't thought about it but what @nudge said is true, the Covey system is more than a todo application and my application can have a premium aspect. I thought of the team-tasking and it sounds like a viable idea to me too. I am getting enough traffic per day to get relevant data from A/B testing. The reason I haven't started them is because I am not sure if this is a viable market or not. I should probably survey the users to ask them. Thank you, your message was very helpful. (I consider myself a developer, not a designer :) I can barely use photoshop so I guess it is a nice compliment, thanks)