Mobile development

I need an iPhone app. I would like it designed and built. Hi. I’m looking for an app to be developed that is pretty similar to one already available called ‘Glow Baby’. This app tracks a babies sleep, feeds and nappy changes. I would an app for people who do Elimination Communication with their baby which involves getting them using a potty from newborn. So I would like a version of Glow Baby where you can specify poos and wees that were caught in a potty rather than just having a nappy option. I don’t need any of the community features of Glow Baby. Below are a list of essentials vs desirables. Essentials: ability to track poos and wees in nappies and in potties with separate symbols and separate counting. Stats on each (nappy and potty/poos and wees) each day as numbers and percentages so they user can see how they are doing. All design work associated with this. Logo design. Desirables: Also track feeding Also track sleeping Contributions by more than one user (multiple users store data for one baby) Please can you quote me for the essentials and then with the added desirable options. And could these options be added at a later date if the app is successful? Also please quote for just iPhone via iPhone and android. I can send images of Glow Baby to show roughly the idea. Budget negotiable. Not sure how much it should be. Thanks a lot.