The Krarkulator is made by an MtG player for MtG players. Specifically if you play Commander and you have a Krark & Sakashima deck, you can use this to simulate all the coin flips, handle the Thumb's replacement effects, keep track of various engine pieces.

I'm the developer who made CounterSpell (the EDH-dedicated life tracker), and I just made this other app as I needed a way to make it easier to play my Krark deck. This app is completely free, so I will remove the first version of the Krarkulator from the dedicated CounterSpell page and link to this one so you can simultaneously handle your Krark triggers here and keep track of life, commander damage and other things over on CounterSpell.

Krarkulator is unofficial Fan Content permitted under the Fan Content Policy. Not approved/endorsed by Wizards. Portions of the materials used are property of Wizards of the Coast. ©Wizards of the Coast LLC.