Smart Calculator is a clean, fast and powerful calculator
designed for students, engineers and everyday use.

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🧮 STANDARD CALCULATOR
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• Addition, subtraction, multiplication, division
• Percentage calculations
• Toggle positive / negative values
• Live result preview while typing
• Long press result to copy

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🔬 SCIENTIFIC MODE
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• Trigonometry — sin, cos, tan
• Inverse trig — sin⁻¹, cos⁻¹, tan⁻¹
• DEG and RAD mode support
• Logarithm — log (base 10), ln (natural)
• Square root √, power xʸ, square x²
• Reciprocal 1/x
• Constants — π (Pi), e (Euler)
• Parentheses support for complex expressions

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🔄 UNIT CONVERTER — 9 Categories
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• Length — Meter, Kilometer, Centimeter,
Millimeter, Mile, Foot, Inch, Yard
• Weight — Kilogram, Gram, Pound,
Ounce, Metric Ton
• Temperature — Celsius, Fahrenheit, Kelvin
• Area — m², km², ft², Acre, Hectare
• Volume — Liter, mL, Gallon, Cup, fl oz
• Speed — km/h, m/s, mph, Knot
• Data — Byte, KB, MB, GB, TB
• Energy — Joule, kJ, Calorie, kcal, kWh
• Pressure — Pascal, Bar, atm, PSI, mmHg

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📋 CALCULATION HISTORY
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• Automatically saves last 100 calculations
• Tap any history entry to restore it
• One tap to clear all history
• Stored locally on your device

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✨ APP HIGHLIGHTS
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• Light and Dark mode support
• Works completely offline
• Haptic feedback on button press
• Clean, minimal interface
• Lightweight — under 5 MB
• No account or sign-in required
• No data collection or tracking
• Supports Android 7.0 and above

Suitable for school students, college students,
engineers, teachers and everyday users.