It's a simple and easy-to-use calculator app.
Widgets are available.
All features are completely free to use.

Features:
- Calculation in parentheses
- Decimal calculation
- Save calculation history
- Reuse of formula
- Reuse of calculation results
- Calculation history total display
- Select the calculation history and calculate the total
- Unlimited number of calculation histories
- Calculation history color
- Calculation history date and time
- Calculation history memo
- Move / duplicate calculation history between folders
- Batch copy / share of calculation history
- Sort calculation history
- Calculation history display order setting
- Batch deletion of calculation history
- Unlimited number of folders
- Folder color
- Pin the folder
- Display the number of histories in the folder list
- Total display in folder list
- Folder sorting
- Folder batch deletion
- Home screen widget support (folder selectable)
- Dark mode
- Free

URL scheme:
calculatorwidget://