Black Calculator

Black Calculator is a powerful engineering calculator with a sleek dark design, featuring over 30 mathematical functions and a built-in formula reference library.

Advanced Mathematical Functions
• Trigonometry – sin, cos, tan, asin, acos, atan
• Hyperbolic Functions – sinh, cosh, tanh
• Logarithms – log₁₀, ln, log₂, plus eˣ, 10ˣ, 2ˣ
• Powers & Roots – x², xʸ, √, ∛, 1/x
• Constants – π (Pi) and e (Euler's number)
• Advanced – x! (factorial), |x|, ⌊x⌋, ⌈x⌋, percentage

SHIFT Mode
Press SHIFT to access secondary functions displayed on each button – inverse trig functions and additional operations.

Angle Units
Toggle between DEG (degrees) and RAD (radians) for trigonometric calculations.

Built-in Formula Reference
Access 28+ formulas across multiple categories:

Algebra (Quadratic Formula, Binomial Theorem, Log Change of Base)

Calculus (Derivatives, Integrals, Taylor Series)

Physics (Ohm's Law, Newton's Laws, Kinetic Energy, Maxwell's Equations)

Geometry (Pythagorean Theorem, Circle Area, Sphere Volume)

Statistics (Standard Deviation, Normal Distribution, Bayes' Theorem)

Finance (Compound Interest)

Chemistry (Ideal Gas Law)

Complex Numbers (Euler's Identity, Fourier Transform)

Long-press any formula to copy it to clipboard!

Smart Features
• Copy & Paste – Copy results or paste expressions from clipboard
• Calculation History – View, reuse, or delete previous calculations (stores up to 100 items)
• Haptic Feedback – Optional vibration on button press (can be toggled off)
• Error Handling – Clear error messages and graceful recovery

Customization
• Backgrounds – Choose from 12 dark gradient images or 12 solid color themes (Void, Abyss, Nebula, Forest, Crimson, Teal, Gold, Navy, Burgundy, Pine, Graphite, Midnight)
• Clean Cyberpunk Aesthetic – Glowing neon accents on a dark foundation

How to Use SHIFT Mode
Press the SHIFT button to activate secondary functions:

sin → asin (inverse sine)

cos → acos (inverse cosine)

tan → atan (inverse tangent)

log → sinh (hyperbolic sine)

ln → cosh (hyperbolic cosine)

log₂ → tanh (hyperbolic tangent)

eˣ → 10ˣ (10 to power x)

x² → xʸ (x to any power y)

Additional Features
• Long-press results to copy to clipboard
• Paste expressions from any app
• Access calculation history with one tap
• Responsive design works on all screen sizes
• Smooth animations and visual feedback

Perfect for: Students, engineers, scientists, math enthusiasts, and anyone who needs a reliable scientific calculator with a beautiful interface.