Grading apps

I just downloaded the card grader app and was wondering if anyone has any luck with this one or another or if it’s even worth it. I don’t really collect modern era cards but do have some I’d like to send for grading but I’m mostly looking into it for my first gens and shadowless. I’m not particularly concerned with the grades mostly just in if for a nice way to preserve them but it would be nice to have an idea of what they could be