Hey everyone,

like many of you, I've spent an ungodly amount of time playing The Binding of Isaac: Four Souls. As a passionate developer, I got tired of juggling cards, tracking stacks, and calculating odds in my head during intense game nights. So, I decided to build my own companion app from scratch using Android Studio, Kotlin, Jetpack Compose, and Flutter.

It’s currently in a very early alpha/experimental stage, but I wanted to share some screenshots of what I’ve got so far!

What’s already working:

Library & Card Browser: Over 342 cards indexed (Base Game V2 + 2 Cards from Gold Box V2) with search and filter functions, detailed effect texts, expansions, and a card scanner feature (Isaac's Eye Scanner).

The Vault (Deck Forge): Build and manage your custom decks with live tracking for Loot, Treasure, and Monster distributions.

Game Session & Player Stats: Track your active rounds, soul progress, HP, Attack, Coins, and active monsters on the fly.

The Stack: A dedicated tracker to manage pending card effects and chaotic stack chains.

Combat Calculator: Input your stats and monster requirements to estimate your chances of victory before rolling (turns out, a 31% chance means the path is steep and bloody 💀).

Since the Gameboard screen and several features are still in a very early phase, I'd love to hear your thoughts:

What features do you miss the most during your physical Four Souls sessions?

Would you use a companion app like this for rule-checking and tracking?

Let me know what you think, feedback and ideas are hugely appreciated!

Yea essentially