The other reviews aren't kidding. Don't waste your time with this app.
Let's get straight to the point: this app is useless without spending $20 something every 3 months. Don't take my word for it: there are countless other reviews mentioning this as well. When you first open the app, guess what? It immediately wants you to allow camera access (makes sense) and notifications (which doesn't make sense, why would a math app need to spam my notifications?), then it asks you to sign up for their subscription. I, like most people, ignored it and clicked the X. The next thing I did was scan a problem. Guess what? You can't get the answer or steps without paying! You read that correctly, you have to buy their subscription to even get access to the answer! What's the point of a calculator if it doesn't even give you the answer?? Imagine if your physical calculator (or calculator app on your phone) said something like "Please pay $9.99 to get access to the answer." This is basically what this app is. Yes, there is a free trial, but you gotta remember to cancel it immediately so it doesn't charge your card. It's just not worth it. Don't waste your time.
TL;DR, app wants money to solve math questions, which defeats the whole point of it being free.