You should read Cory Doctorow's explanation of what apps are being used for...
Please clarify?
apps are a closed platform, and reverse-engineering and modifying an app is a literal felony – several felonies, in fact. An app is just a web-page skinned with enough IP to make it a felony to modify it to protect your consumer, privacy or labor rights:
(Google is leading a charge to turn the web into the kind of enshittifier's paradise that apps represent, blocking the use of privacy plugins and proposing changes to browser architecture that would allow them to felonize modifying a browser without permission)