If you play MTG Arena, you should use Untapped.gg, full stop. I’ve been using it for years and am still finding new ways it can help me as a professional player and content creator, and it’s perhaps even more useful for newer or more casual players! Information is everything when it comes to enjoying Magic: the Gathering and Untapped.gg is the number one source for it.
Untapped.gg is the deck tracker I never knew I needed. As a professional player its stat tracking features are vital for me to know everything I need to compete at the highest level. I don’t think I’ll ever play another game of Arena without it.