App development & deployment - Business valuation - Apple + Android

We want an App to be freely downloadable by users of Apple and Android devices. The App provides a basic calculation to give the user an indicative current and potential valuation of a business based on a 4 step approach (see the attached spreadsheet). Home page = Entry to valuation model Access to text pages about selling your business & contact page Valuation model = 1 Entry of 9 basic numerical data items 2 Entry of 5 estimated % changes achievable 3 Entry of a maximum 4 further numerical data items (dependent on a yes/no Q) 4 Scoring 12 questions about the business The results are presented as indicative values plus up to 5 text red flags Valuation results = User to be able to print / save / send themselves the results in a format which includes our branding and contact details User to be able to contact us via buttons under each result, the contact requiring them to provide contact details name / contact number email etc & the App to attach the valuation data they have entered General comments = While the attached spreadsheet gives the basic functionality the App’s appearance will need to be designed to incorporate / use our branding / logos. At many of these steps there will be buttons to obtain further information which will need to be links to website pages Other specifications / requirements = App needs to be developed for both Apple and Android environments We will need the developers to be able to deploy / launch the App into the appropriate channels (iTunes etc?) so as to be downloadable by users We will want the ability to access and edit the App for any changes we want to make / additional links we want to post