Existing app modification - simple app

base app : mifare classic tool in adroid app store

source code is available in github
purpose : duplicate app and modification some point
original flow : refer to movie and excel file.

excel file : ----------

movie file : ----------

modi point : refer to excel file

I think this app modification is not complicated and specialized for single purpose.
My target is to publish app for my own work.

more request during modification can be raised for ---------- will be reasonable not extreme.
Feed free to ask question.