Yeah in fact one thing claude is freaking great at is decompilation.
If you can download it client side you can likely place a copy in a folder and ask claude
‘decompile the app in this folder to answer further questions on how it works. As an an example first question explain what happens when a user does X’.
I do this with obscure video games where i want to a guide on how some mechanics work. Eg. https://pastes.io/jagged-all-69136 as a result of a session.
It can ruin some games but despite the possibility of hallucinations i find it waaay more reliable than random internet answers.
Works for apps too. Obfuscation doesn’t seem to stop it.