EngToolBox vs Physics Constants Library

EngToolBox is an offline engineering and productivity app that brings calculators, technical tools, timers, and wellbeing features into one place. **Calculators** Includes basic arithmetic, binary, octal, hexadecimal, number base conversion, logarithmic and exponential calculations, symbolic mathematics, and numerical integration. **Engineering Lab** A collection of engineering tools and reference notes for technical calculations and learning. **Timers** Four timers for different tasks: Pomodoro, Focus Timer, Countdown, and Stopwatch with lap tracking. Supported timers also provide Live Activities on compatible iPhones. **Wellbeing** Daily Reset offers a quick personal check-in. Guided Breathing provides adjustable breathing exercises, while Desk Recovery offers short breaks for screen-heavy work. The Private Journal allows you to write and store personal entries locally. Entries are encrypted using Apple's CryptoKit, with encryption keys protected through Keychain. Access is secured using Face ID, Touch ID, or your device passcode. **Settings** Choose between Light and Dark Mode, customize supported sounds, and enable or disable haptic feedback. EngToolBox is designed to work offline, without requiring an internet connection for its core features. If you encounter a bug or have a suggestion, feel free to get in touch.

Discover the building blocks of our universe with Physics Constants Library – the ultimate reference and learning tool for students, educators, and professionals. Whether you’re preparing for exams, teaching in the classroom, or working on research, this app puts the most important physics constants and tools at your fingertips. What You’ll Get • 20+ Fundamental Constants – Gravity, Planck’s constant, electron charge, speed of light, and more. • Smart Search & Filters – Quickly find constants by name, symbol, or value. • Multi-Unit Support – Switch between SI, CGS, Imperial, and other unit systems. • Interactive Learning – Use flashcards, quizzes, and study modes to strengthen memory. • Professional Tools – Unit converter, calculator, and built-in formula helper. • Offline Access – Access all content anytime, without internet. Key Features Constants Library • Covers mechanics, quantum physics, thermodynamics, electromagnetism, and more. • Includes historical context, real-world applications, and related concepts. Learning Center • Flashcards with smart repetition for long-term retention. • Quizzes with adjustable difficulty levels. • Study progress tracking to stay motivated. Professional Tools • Advanced unit converter with 25+ categories. • Scientific calculator with constants built-in. • Formula helper to apply equations instantly. Modern Experience • Clean, elegant interface designed for clarity. • Dark mode, 10 app themes - System, Light, Dark, Cosmic, Quantum, Sunset, Ocean, Forest, Aurora, Midnight and accessibility support. • Favorites tab for quick access to your most-used constants. Perfect For • Students – Learn and memorize constants with ease. • Teachers – Enhance lessons with interactive study tools. • Researchers & Engineers – Reliable, quick reference during work. • Enthusiasts – Explore the fundamental constants that shape our world. Data Accuracy You Can Trust All values are based on CODATA 2018 recommendations and NIST standards, ensuring precision for both academic and professional use. Upgrade for More Unlock premium to access advanced study modes, unlimited practice, and detailed progress analytics. Download Physics Constants Library today and take your physics knowledge to the next level!