App is okay lately has been crashing and unable to log in, also the fees, When you buy crypto from the app you'll pay a higher price than what the app is currently telling you it's worth, so if you buy $100 of cardano when the app tells you it's worth $0.99, but you pay $1 for each one, and it rises to $1.10 when go to sell it, you will be given the lower market price which would likely be $0.98 so they've made money of you. They call it slippage because of market volatility, but check Reddit.