And what about if it’s free? (Well, you can start using the free option!)
In case you still don’t know about it, I am talking about an app I just tried few days ago. It’s name is Speechling. Well, in fact you can either use their app or the web, both work great.
I just tried it to improve my English first, and I found it so helpful! I had to listen to a sentence / word, and then clicked to record it. And one day later, my personal language coach sent me some feedback about my pronunciation.