Like I said, not a techie here. But as I read and learn, I'm wondering if I could somehow do the following:

Use the backup I now have of husband's iphone to backup MY PHONE. Would I then be able to access app data? The main one I'm wondering about is TextPlus Silver. I'm thinking it still wouldn't help because I would need his username and password.

But for other apps, that don't require you sign in, would his past data on these apps show up on my phone? What might be accessible to me if I did this?