YOU SAID:

This app is insane and I don't understand its purpose.

INTO JAPANESE

このアプリは正気とその目的を理解していません。

BACK INTO ENGLISH

This app does not understand sanity and purpose.

INTO JAPANESE

このアプリでは、健全性と目的を理解していません。

BACK INTO ENGLISH

This app does not understand integrity and purpose.

INTO JAPANESE

このアプリでは、完全性と目的を理解していません。

BACK INTO ENGLISH

This app does not understand integrity and purpose.