It seems from a number of reviews that this app does very little, and a bunch of what it does, it doesn’t do well. While a large number of people give it four and even five stars, I think that’s more because of what the app is, than how good it is. I also agree that a subscription for something like this is unwarranted. If the developer wants money, just charge for the app. It’s a utility, it’s not really worth that much.