iPad App Development

I need an app that get information from my current web applicaton (build using php/MySQL). All data are transferred via API in XML or JSON format and needs to get processed in an ipad app. Once all data are synched, ipad can be taken anywhere to update data within the app. A must have feature is offline data storage i.e. Any changes in the app should be saved offline (if there is no internet), once internet is back, all data should automatically sync to the cloud. Points to Remember: 1. This is a customer/supplier based app. 2. A supplier will have multiple customers and all customer informations are saved locally within the app. 3. Once supplier start the app, he/she can add/edit/delete any customer or customer information which needs to get saved in local DB. 4. Once internet is back in the ipad, all information should automatically sync with the server and push all offline data as well as pull new data from the server. 5. Images will be transferred back and forth between App and server. 6. Few simple graph (for reporting purpose) is required. 7. Geo location of customer should be displayed (i.e. Based on address of each customer) in 1 of the screen/tab. 8. Payment integration is required with Stripe. 10. Calendar is required to book a service for the customer. 11. End Customer version is not required at this moment (only supplier version is required). Feel free to ask any question on the app.