A scientific calculator with unit converter and calculations history.

After upgrade to version 2.0.0, app's "clear data" is highly recommended!

Features:
- Basic and scientific calculations
- Constants
- Unit conversion (70 categories)
- Calculations history

Extras :
- Car tire size calculator
- Least-squares regression calculator (Linear, Parabola)
- Quadratic roots calculator
- Area / Volume calculator
- Rule of three (direct/inverse proportion)
- VAT calculator
- Tip & split calculator
- Loan calculator
- Adults BMI calculator
- Chemical elements list
- Rectangular to/from Polar

Interface features:
- Light / Dark theme
- Widgets themes
- Keypad feedback
- Widgets keypad feedback (Can be enabled in-app settings)
- Keep screen on

*Widgets*
- Lockscreen support (android 4.2+)
- Scientific Calculator widget
- Basic Calculator widget
- VAT Calculator widget
- Unit Converter widget
- Tip & split Calculator widget

Screenshots: