Android and iOS Developer

The project is a simple 1 screen UI that sends a text packet over Bluetooth to a device. The project is 90% complete just needs final touches.

The last developer bailed out and said he was sick. Now, I am approaching the deadline. He was also not very skilled.

Requirements:
Be able to work over the next few days to finish the requirements.
Note that these are already built into the firmware just need to add them into the code for iOS and Android.
– Encrypt current payload and add required encryption to the app
– Ability to send password and change password on mobile firmware.
– Improve any areas that are unstable in the iOS and Android