I actually enjoy the free version of the app. That being said I SERIOUSLY do not recommend doing the premium subscription or trial unless you 100% want to purchase it. They make it incredibly difficult to cancel, the reason being that they can't actually cancel. Apparently Google has to. I had to do some digging on their site via pc (nothing on mobile) and found mention that the only way to cancel is to go to your app store of choice > subscriptions > cancel. Nice free app, shady premium trial