To do Writeup

Solved by: Starry-lord

De-compile the app

I personally used https://www.decompiler.com/jar/62e31f7faaf148b1b1c4fd143e5480c1/todo.apk/sources/com/congon4tor/todo/LoginActivity.java

Find password “testtest”

Login to the app and find to do list along with the flag