
Free
About
Build roulette strategies with real probability math. See expected value, hit rate, coverage, and volatility update live as you build combinations on a static table layout. No spins. No chips. No casino.
RouletteStrat is an educational probability calculator and strategy simulator. Place bets, watch the math update, understand the odds.
STRATEGY BUILDER
Tap any cell on the static roulette layout to build a bet combination. Straight-up, split, street, corner, six-line, and outside bets. Your full probability profile updates in real time.
15 CLASSIC STRATEGY TEMPLATES
Load well-known strategies instantly and inspect their exact probability metrics: James Bond, Martingale, Fibonacci, D'Alembert, Labouchere, Paroli, Snake, Jeu Zéro, Voisins du Zéro, Tiers du Cylindre, Orphelins, 1-3-2-6, All-on-Red, Corner System, Dozens Chase.
MONTE CARLO SIMULATOR
Run thousands of simulated rounds on any strategy. Set session length, stop-loss threshold, and profit target. View projected bankroll distribution before committing to a setup.
SESSION LEDGER
Log wins, losses, and pushes manually to track a live session. No casino integration, no payments, no wagering occurs in the app.
SAVE YOUR STRATEGIES
Sign in with Apple, Google, or email to save custom strategies to the cloud.
EUROPEAN AND AMERICAN WHEELS
Toggle between EU (single zero, 2.70% house edge) and US (double zero, 5.26% house edge). Every calculation updates automatically.
FOUR LIVE METRICS
• Hit Rate: probability that at least one bet wins on a given spin
• Coverage: percentage of possible outcomes your bets cover
• Expected Value: exact EV per unit wagered
• Volatility: standard deviation of outcomes per spin
This is not a casino game. No real-money wagering. No in-app purchases. No virtual currency. No gambling.
FEATURES
• Static roulette table layout, tap to build, instant calculation
• Real-time EV, hit rate, coverage, and volatility
• 15 classic strategy templates with full probability metrics
• Monte Carlo probability simulation engine
• Manual session ledger
• Cloud strategy save and load
• Apple Sign-In and Google Sign-In
• European and American wheel support
• Dark mode interface
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What's New in Roulette Strategy Builder
1.0.0
July 26, 2026