app to check if I bought new or used phone?

[paparazzo79]

I purchased a phone from Ulefone 2 days ago,but guy in local store went out of the store and brought it to me,so I'm little suspicious if the phone was used previously,maybe even repaired, or it was really new?
Is there any kind of app to check that,maybe through battery discharge cycles to check if there is any program for that kind of stuff?