The Cut Card
up · 165ms 2026 · React Native · Expo · TypeScript · Cloudflare Workers · AI-assisted
Blackjack practice that drills you to correct first and fast second: basic strategy, counting, and the arithmetic of how much you can put at risk.
The decision
I made one rule before writing anything and held it: no claim about money, anywhere — not in the app, not on the paywall, not in a notification. A practice tool for a game with an edge against you has exactly one honest job, which is making you correct, and the moment it implies a return it has started lying. The engine that does the strategy, counting and risk maths is plain TypeScript with no React in it, so it can be tested without a simulator.
What it does not do
It teaches; it does not predict, and it will not tell you what you stand to win. Nothing in it is financial advice and it is not a system.
What an AI wrote
AI-assisted Claude wrote most of the code. The no-money-claims rule, the free-versus-paid line, and the decision to keep the engine framework-free are mine.