Features on both iPhone and iPad:

• Ad-free
• Intuitive and simple design for daily calculations
• Choose your preferred accent colour
• Large "+" button for frequent use of summation
• No intimidating "sin", "cos", "tan", or "log" buttons


Features on iPad:

• Sensible UI with buttons not stretched to the entire screen
• Access calculator in the centre or at any corner in full-screen mode
• Support multitasking (split-screen) with other apps
• Support hardware keyboard input