Familiar Calc: Desk Calculator

Familiar Calc works like the desk calculator you already use: the same key layout and the same calculation behavior. Use it for everyday work or for accounting and bookkeeping study, even when your calculator isn’t at hand.

SAME KEY LAYOUT
Choose the Casio DS-20DC, Casio JS-20WK, or Sharp EL-G37 layout. Keys are placed to match each manufacturer’s manual and product photos, down to 0, 00, ▶, and GT.

SAME CALCULATION BEHAVIOR
• Constant calculation (double operator on Casio, automatic after = on Sharp)
• Percent calculations as each maker defines them
• GT, memory, √, and tax keys
• What C, CE, and AC clear
Results are checked against the examples in each manufacturer’s manual.

SLIDE SWITCHES
Rounding (F, CUT, UP, 5/4) and decimal places (5–0, ADD2) in the same place as on the calculator. Touch a switch to enlarge it.

LCD-STYLE DISPLAY
A 12-digit seven-segment display with digit separators and M, GT, and K indicators.

FEEDBACK
A click and a tap with each key. Number keys and other keys sound different, so you notice mistyped keys. A stronger tap on 5 lets you feel where your finger is.

MORE
• Touch and hold the display to copy a result or paste a number
• Landscape on iPhone, and iPad support (actual size on iPad mini)

FREE AND FULL VERSION
The free version includes every calculation on the DS-20DC layout except GT.
The Full Version (one-time in-app purchase) adds GT, other calculators, actual-size display, Home Position Mode, adjustable key spacing, and muting key sounds. No subscription and no ads.

NOTES
• Phones and tablets are not allowed in exams.
• Day/time calculation and check keys are not supported yet.
• CASIO is a trademark of Casio Computer Co., Ltd. SHARP is a trademark of Sharp Corporation. This app is not affiliated with them.
• This app does not collect any data.