And we believe in good quality and service, so we have some basic requirement before starting work...
Below is how I work with buyers...
1.) Write your requirement (Describe all the features the app MUST possess). If possible come up with mockups or wire frames.
2.) We agree on cost and I begin app or web app development.
3.) I am done when I have created an app that satisfies your app requirement.
4.) Revisions during/after development will cost you extras. (Cost is dependent on the number of changes to be made)