Deck Odds turns your device into a powerful offline probability lab. Track every drawn card, watch conditional probabilities shift in real-time, and master combinatorics with transparent step-by-step workings.
Download Deck Odds
Select one exclusive bonus package to supercharge your probability mastery. Each code unlocks premium study resources. Act fast — these expire soon.
Promotional codes grant access to educational content within Deck Odds. No wagering, stakes, or gambling features. Educational use only. iOS 15.0 or later required.
Built from the ground up for students, tutors, and self-learners who demand transparency in every calculation.
Deck Odds uses a standard 52-card deck as its sample space model. Every card you mark as drawn is immediately removed from all subsequent probability calculations. No hidden formulas, no black-box results — just pure mathematical transparency.
The app displays conditional probabilities as both reduced fractions and percentages. Tap any result to reveal the complete combinatorial derivation, broken into individual steps with plain-language explanations alongside formal notation. This dual-layer approach helps you understand not just the answer, but the reasoning path.
Version 1.1 optimizes the interface for both iPhone and iPad, delivering faster calculation rendering and more stable scenario management. Your entire study library stays on-device with SwiftData, ensuring complete offline functionality even in zero-connectivity environments like exam halls or classrooms with restricted networks.
Every feature designed to eliminate confusion and maximize learning speed.
Visualize all 52 cards at once. Tap to mark drawn cards, watch probabilities recalculate instantly as your sample space shrinks. Four rows for four suits, crystal-clear status indicators.
See conditional probabilities update the moment you change the grid. Results show as reduced fractions with percentage conversions, plus formal notation for academic rigor.
Every calculation expands into a full combinatorial proof. Each step includes the formula, arithmetic, and plain-English explanation so you learn the method, not just the answer.
Save unlimited probability scenarios with descriptive names and tags. Pre-loaded lesson examples cover conditionals, hypergeometric distributions, combinations, and complement rules.
Test your mastery with multiple-choice probability questions. Immediate feedback on correct answers, with explanations for missed items. Track your accuracy over time.
Convert any analysis into a formatted PDF document. Perfect for homework submissions, study guides, or tutoring sessions. Includes all steps and explanations.
How Deck Odds transforms abstract probability theory into concrete understanding.
Deck Odds is explicitly designed as a classroom reference tool. It calculates probabilities for academic understanding only. The app contains no wagering features, no stake recommendations, no money tracking, and no game simulation. It is a pure study notebook for students and tutors working with probability theory.
All data remains on your device. There are no accounts, no cloud sync, and no data collection. Your learner name, saved scenarios, and quiz results stay private using SwiftData and UserDefaults. Delete the app to remove all traces.
iOS 15.0 or later • Free to download • No in-app purchases required • Updated 26.10.2026
Download Deck OddsCompatible with iPhone and iPad. Optimized for both portrait and landscape orientations. Educational tool rated for all ages. No gambling features included.