Android/iOS Mobile Developer to build app for counting people with device camera

Hi there, We need to make an app that can count people getting in and out from places using the phone/tablet camera, after counting the people the app should send the data to our wordpress site to update the venue status (refer to PDF attached). We have already build the back end in wordpress, we only need the Android/iOS app and the web services for user login and venue status update. For user login maybe you can use this wordpress plugin [login to view URL] Flow for the app: 1. Wordpress user login in the app and the venue assigned to that specific user will display in the dashboard page. 2. The user create the parameter rules for that venue, and to be able to saved or update the rules the app will be send a verification code to the wordpress admin email, and admin will provide to the user this code and the user will be able to save or update those parameters. Tha code should expire after 2 hours. 3. After the rules are saved the app will be start counting people that are coming in or coming out from the venue. 4. If the user logout from the app, the app will stop counting. 5. The app should allow us to manipulate the brightness to calibrate in the low light conditions. Please check PDF file for more understanding before bid. Best bid and time frame will be answered