THE COMPANION TOOLKIT
Less guesswork.
Better next moves.
Three focused tools for TCG Card Shop Simulator. Everything calculates in your browser, with the assumptions right beside the answer.
BUILD & CHECK
Deck planner
Count your 50 cards, check copy limits, track missing cards and keep a local backup.
Open toolPLAN YOUR DRAWS
Opening-hand odds
See the chance of finding a target card in an opening hand. Exact math, clear assumptions.
Open toolRUN YOUR SHOP
Profit calculator
Turn cost and markup into price, gross margin, operating profit and a break-even estimate.
Open toolLocal-first, by design.
Your deck worksheet stays in this browser. Download a JSON backup to keep a copy or move it to another device. No Steam login, game-save upload or account required.
Not a black box.
Count checks do not establish full deck legality. Draw math is not a win prediction. A profit estimate is not a guarantee that customers will buy. Each tool tells you exactly what it does.