Combinations & Probabilities

The real math behind every lottery, dice roll and coin toss. Calculate combinations and odds instantly. Pro unlock — pay once, no subscription.

Combinations & Probabilities puts the full power of discrete mathematics in your pocket — instantly.

Whether you're a student, educator, analyst or simply curious about the real odds of anything, this is your precision toolkit.

Beautifully designed for iOS 26 with Liquid Glass, supporting dark and light modes.

CALCULATORS Combinations and permutations — with or without repetition — plus factorial, all powered by a prime-factorized fraction engine for exact, simplified results. Live calculation updates in real-time as you move the sliders. No loading, no waiting. Just math.

PROBABILITY ENGINE Type favorable and total outcomes directly, or pipe your combination result into the probability calculator with a single tap. P(A) = m/n, calculated instantly.

SCENARIOS Jump into pre-configured probability models — no setup required: · Lottery Models — real draws from the Americas and Europe. See how odds shift when you play 7 numbers instead of 6. · Dice — single or multiple dice, any target outcome. · Coins — exact odds for any head/tail sequence.

HISTORY Tap copy on any result to save it to your history and clipboard simultaneously. Recall, reuse or delete individual entries. Up to 200 saved calculations in Pro — enough for the most demanding sessions.

SMART INPUT Sliders for broad sweeps. Step controls — and + for precision. Input validation prevents mathematically impossible states — you simply can't break it.

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C&P Pro is a one-time purchase that removes ads and unlocks all current and future features forever. No subscription. No recurring charges. Pay once, yours forever.

All purchases are processed by Apple and subject to Apple's Terms of Sale: https://www.apple.com/legal/internet-services/itunes/

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Available in English, Portuguese, Spanish, French, Italian and German.