I'm glad it isn't, that would effectively price me out. The current price point is quite steep just for being able to check on my private server on the go (I don't earn a penny from it, it's just for fun and toying around), a subscription would be a dealbreaker. A dozen apps for the price of a coffee a month ends up being real money over the long run, and not everyone who buys this sort of thing has company money to spend.