It was really good at first. I had planned to learn Go and review Python. My hopes should have never been high. Like all other coding apps, everything is blocked behind a paywall. You have got to be kidding me! You are not going to attracting any users with an app like this! Here's my recommendation: make learn-mode and code playground free, and make only a few features "Premium". This will make me reinstall the app. I understand you need money, but don't do this!