Taking the LSAT in December doesn't put you at a disadvantage. Even the Feb LSAT is accepted by lots of schools. Don't worry. Take the exam when you're ready.
Hmm ok. Maybe I'm just being paranoid haha. I'm in need of a new laptop. I told myself once I get accepted into law school I'd get a new one as a gift to myself haha! But so far I like the app, you're right it's super convenient :D