Credits & Acknowledgments

Recognizing the technologies, resources, and contributions that make CoinFlipTool possible

Coin Image Attribution

The coin images used in CoinFlipTool are based on photographs by Ángel M. Felicísimo.

Original Image Sources:

Original photograph:

Moneda de cuarto de dólar (1954) by Á. M. Felicísimo (Flickr)

License & Usage:

License: Creative Commons Attribution 2.0 Generic (CC BY 2.0)

Changes Made: Original images were adapted and enhanced for use in CoinFlipTool, including background removal, silver color restoration, brightness and contrast optimization, detail sharpening, and visual cleanup for a cleaner coin-flip presentation.

Coin Details: 1954 Washington Quarter, minted in Denver, featuring George Washington. The coin is 90% silver and 10% copper, with a 24.3 mm diameter and 6.25 g weight.

Thank you to Ángel M. Felicísimo for providing these excellent photographs under Creative Commons licensing, making them available for projects like CoinFlipTool.

Technologies & Design

CoinFlipTool is built using modern web technologies with a focus on performance, responsiveness, and reliability.

  • • React & Next.js
  • • TypeScript
  • • Tailwind CSS
  • • Recharts
  • • Remix Icons & Material Symbols
  • • Custom graphics and animations

Content Sources

The educational and statistical content in CoinFlipTool is based on widely recognized academic principles and publicly available reference materials.

Core concepts are grounded in classical probability theory, including independent events, Bernoulli trials, and the law of large numbers, which describe how outcomes such as coin tosses approach stable distributions over time.

Representative sources and reference materials include:

  • • Encyclopaedia Britannica - foundational explanations of probability, randomness, and statistical laws
  • • Academic research in probability and statistics - including distributions, inference, and randomness theory
  • • Official rules and documentation from sports governing bodies - covering real-world use of coin toss decisions
  • • General mathematical literature and open educational resources - supporting clear and accessible explanations

These sources provide the conceptual foundation behind the articles and simulations, helping keep the content clear, transparent, and educational.

Special Thanks

We extend our gratitude to the individuals and communities that made this project possible:

  • • Open-source community - Developers and maintainers behind the tools we rely on
  • • Early testers and users - People who provided feedback and helped identify issues
  • • Mathematics community - Advancing understanding of probability and statistics
  • • Educators and learners - Supporting curiosity, learning, and critical thinking

Legal & Licensing

For full legal information, terms of use, and licensing details, please refer to the Legal page.