100% Free Casual Probability Game

Can You Double Your Money Before You Go Bust?

A captivating casual mini-game demonstrating the raw mathematics of luck. Pick Heads or Tails, wager your virtual stake, earn an 80% profit on wins, and try to reach your target before probability catches up!

Get It On Google Play

Try Interactive Demo

                        0%
                        No Real Money
                    

                        +80%
                        Profit on Win
                    

                        50/50
                        True Coin Odds
                    

                        2X Target
                        Double or Bust
                    

Luck Tester

The ultimate psychological test of risk, discipline, and luck.

Pure entertainment simulation with virtual points.

Interactive Preview

Test Your Luck Right Now

Experience the exact mechanics of the Android app directly in your browser. Can you reach $2,000 without hitting $0?

Virtual Bankroll

$1,000

Goal: Reach $2,000

HEAD

TAIL

Choose your side, set a stake, and spin!

1. Select Side

2. Choose Stake Amount

Game Rules

Simple Rules, Deep Dilemma

Luck Tester is designed around transparent, straightforward rules with an intriguing mathematical twist.

Starting Bankroll

You are given an initial virtual starting balance. No real deposits or financial risk—pure simulated excitement.

Choose Side & Stake

Decide your risk tolerance. Select either Head or Tail and allocate a portion (or all) of your balance as your stake.

80% Profit on Wins

If the coin matches your choice, you win back your stake plus an 80% profit. If you lose, the stake amount is gone.

Double or Bust

The challenge continues until you successfully double your starting bankroll or lose everything trying.

The Math Behind Luck

Why Is Winning So Hard & Losing So Easy?

In a true 50/50 coin flip with an 80% payout on wins and a 100% loss on failures, the Expected Value (EV) per spin is negative:

EV = (0.5 × +0.80) + (0.5 × -1.00) = -0.10 (-10%)

Over time, the house edge mathematically eats your balance. That’s why doubling your money requires timing, discipline, and exceptional luck. It's an invaluable lesson in probability!

The Payout Structure

Coin Probability 50% / 50%

Win Return +80% Profit

Loss Penalty -100% Stake

Expected Outcome Negative EV (-10%)

Ready to Test Your Luck?

Download Luck Tester now for Android and test whether you have what it takes to double your bankroll against the odds.

Available Now on Google Play Store