Three independent calculators can be switched by swiping the display area

HEX calculator (hexadecimal)
Maximum 64-bit display
Decimal input HEX conversion ([>HEX] button)
Continuous calculations are supported
　Example [3][+][+][A][=] → d
　 [=] → 17
　 [=] → 21 ...
ASCII code list
　[AC][ASCII].

INT calculator (integer)
Division also displays remainder (wide display area mode)
Displays up to 20 digits (including sign)
Supports consecutive calculations
　Example [3][+][+][2][=] → 5
　 [=] → 7
　 [=] → 9 ...
The following special keys are supported
　[AC][=][=][=] → This year's calendar
　[YYYY][=][=] → Calendar for the year YYYY
Current time display available
Simple stopwatch (in seconds)
Simple countdown timer (*Notification may be slightly delayed when the device is in sleep mode)

DEC calculator
Division also displays remainder (wide display area mode)
Maximum 20-digit display (including decimal point and sign)
10 digits for input and 11 digits for display after the decimal point
Calculation precision is as same as BigDecimal
When rounding occurs in the display, the last digit is displayed a little smaller.
Supports consecutive calculations.
　Example: [3][+][+][2.5][=] → 5.5
　 [=] → 8
　 [=] → 10.5 ...
The following special keystrokes are supported
　[3][.] [.] → 3.14159265358979323846
　[n][÷][=][=] → 1 / n
　[n][×][=][=] → n × n
　[n][-][=][=] → √n(square root / 0 <= n)