Profitable business model for pro accounts .

I've been thinking that integration with google drive , Dropbox, and Evernote, is now long overdue .

Maybe that's an economic aspect of the Apis of these services ( do not know exactly the requirements for integrating these services )

I think it would be a good idea to differentiate free users for users with professional features as follows .

Interface Design
· Same design for all users

free users
· App iphone
· App android
· Sync every 24 hours

Pro users
· App iphone
· Android App
· Ipad App
· Windows app
· Mac App
· Integration with Dropbox
Integration with Google Drive
· Ingegración with Evernote
· Synchronization with Google Calendar
· Goals
· Priority Support
· Email Attachments When adding task with email
· Activity and Statistics report

I really would be interested in these functions , even would be willing to pay more for my subscription pro , if change is implemented in the service Doit

Sure that like me, there are more users who think alike and want advanced features.

I think one has to have GTD application file integration , taking into account that 90 % of our business is digital

The manual integration of Dropbox or Google links Drive, is possible, but slow.

Thanks for your attention