App development for iOS and Android

The aim is to develop an App to operate and to control a small electronic device. The communication between the App and the electronic device is exclusively done via Near Field Communication (NFC). The electronic device is equipped with an ST25DV64K dynamic NFC Tag (Type 5 Tag).
The commands to operate the electronic device are written in NFC Data Exchange Format (NDEF), in particular ‘NDEF text records’. A different method/protocol could be agreed as well, most important is that the App is able to write data to the EEPROM of the NFC Tag.
The main function of the App is to display measurement data. The measurement data is provided by the electronic device via NFC. This data needs to be presented on the mobile (phone) in a graph. The X and Y axis of the plot are given in the same unit and the plot needs to be true to scale. Landscape format and a zooming function might become essential.
The mobile App should allow at least two languages. First version will be English.
The mobile App will be available for iOS and Android.
A storyboard of the App will be delivered upon request.
Beneficial for this project is to have NFC skills for both platforms (iOS and Android) and experiences on true to scale plots.