What if you knew when your game-breaking Hearthstone card was going to be drawn?

The Hearth Track – Hearthstone Tracker and Companion app is trying to do just that for you. Made by 24-year-old Mervyn Ong from Singapore, iOS app Hearth Track allows you to keep track of your Hearthstone deck’s cards while in a match. Better than that, it also helps you calculate the percentage of you drawing your game-changing card (I’m looking at you, Lightspawn).

The $0.99 app also allows you to build and store constructed and arena decks and contains the entire Hearthstone card list. The bare-bones Hearth Track app is both functional and useful, though you do have to manually discard your deck’s cards while in a match. However this didn’t prove to be a distraction from the actual game at all.

(See: Our Hearthstone deck building guide for newbies)

“I decided to make the app because I wanted to be able to quickly access the cards database and have one that stays constantly updated,” says Ong via an email interview. He adds that he wanted to “have an idea of potentially drawing a particular card […] which would help a lot in terms of strategizing.”

Ong also said that before Hearth Track, there weren’t any apps to track Hearthstone decks. There is an existing Hearthtracker program, but that only tracks your gameplay stats, not individual cards.

Ong has been playing Hearthstone since last October when it was still in closed beta, and currently mains a mid to late-range Druid deck. The Hearth Track app is available worldwide and can be downloaded for $0.99.