I edited this post, mostly to fix its grammar and spelling.
Additionally, I edited the title.
It was originally titled "can I sue an app", but since an app is a computer program, it seems very likely to me that OP meant to sue a developer and/or a service provider; I edited accordingly and the edit was approved, but then undone.
I thought it was a mistake, so I re-edited.
This time it was rejected on the grounds that it "did not correct critical issues with the post".
The misconception that you can sue an app, which is not a legal person, instead of a company or individual developing it or providing a service through it, seems a fairly critical one to me.