The pocket calculator Woo Dentaku is a simple calculator.
It can share calculations between iOS device and Apple Watch.
It handles two sales tax rates and two tip rates.
And you can customize key assign.
All settings for Apple Watch can be changed easily with iPhone.
All features are available as a free trial. Afterward, unlock the app via in-app purchase.

Function
- Basic four arithmetic operation functions
- Theme color (default, monochrome, red, blue, yellow)
- Display of input formula
- Constant calculation
- GT (grand total) function
- Landscape display is available for iPhone 6/7/8 Plus, iPad
- Memory function
- Max 24 significant digits
- Choose from 8, 10, 12, 16, 20, 24.
- Tax included calculated without tax
- Chip calculation
- Customizable key assigns
- Customizable key bindings between keyboard keys and calculator keys

Apple Watch
- Various key arrangements
- 3 x 5 and 3 x 4, 3 x 3, 2 x 2 key arrangement can be selected
- Arrangement for the right hand then left hand
- Quick page move
- It is divided into multiple pages,
Paging can be swiftly done with swipe and digital crown
- Move to numeric input page automatically by inputting operator etc.