YOU SAID:

This is a stupid app so why do it.

INTO JAPANESE

これはばかげたアプリなので、なぜそれをするのですか。

BACK INTO ENGLISH

This is a ridiculous app, so why do you do it?

INTO JAPANESE

これはばかげたアプリですが、なぜそれをするのですか？

BACK INTO ENGLISH

This is a ridiculous app, why do you do it?

INTO JAPANESE

これはばかげたアプリです、なぜあなたはそれをしますか？

BACK INTO ENGLISH

This is a ridiculous app, why do you do it?