Untapped.gg is described as 'Online deck tracker & analytics for Magic: The Gathering Arena'. There are six alternatives to Untapped.gg for a variety of platforms, including Windows, Linux, Android, iPhone and iPad. The best alternative is MTG Arena Tool, which is both free and Open Source. Other great apps like Untapped.gg are Arena Tutor (Free), MTGA Pro Tracker (Free, Open Source), 17Lands Client (Free, Open Source) and MTGA Tracker (Free, Open Source).
Optimize your deckbuilding experience — Never waste another wildcard. Grow your collection more efficiently by having a perfect picture of which packs to open and which cards to craft. Upload your collection and start tracking your favorite decks!