bwCalc（シンプルにデザインされた計算機、税込みも表示） 2.8

This is a calculator designed specifically for Black, White, and colorful iPhone models.

• Black: features a monolithic, cohesive design.
• White: presents a cool, sleek appearance accented with black lines.
• Color: perfectly matches the hues of the iPhone XR.
• Classic: reminiscent of vintage calculators.

Additional functionalities include:

• Double-tapping the result display allows for copying and pasting.
• Swiping horizontally on the result display deletes one digit at a time.
• Tapping the +tax amount copies its value into the input field.
• The font style of numbers can be customized.

Navigation and settings features:

• Tapping the top right corner opens the calculation history, which can be tapped to transfer to the input field or swiped to delete individual entries. A trash icon clears all history at once.
• The top left corner leads to the settings screen, where users can choose between two tap sounds, activate tax-inclusive display upon pressing '=', change fonts, prevent the app from entering sleep mode during use, and display a small clock at the top of the screen.

An interesting note is that it includes an advanced feature for number base conversions among decimal, binary, and hexadecimal systems.