CalcBoard / Programmer Calculator

Hex, Binary, Octal & Decimal — All Four Bases at Once

CalcBoard's programmer mode shows every value in BIN, OCT, DEC, and HEX simultaneously — no cycling through bases — with the bitwise operators you actually use.

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The display is the feature

Most programmer calculators make you toggle between bases and hold the other representations in your head. CalcBoard renders all four bases at the same time: type 255 and see 1111 1111, 377, 255, and FF stacked on the display, binary nibble-grouped for readability. Tap any row to switch your input base to it.

Bitwise, the full set

  • Logic: AND, OR, XOR, NOT — each key VoiceOver-labeled by name, not symbol.
  • Shifts: left shift (<<) and right shift (>>).
  • Integer arithmetic: +, −, ×, and truncating division, with parentheses.
  • Hex input: A–F keys on the keypad, and full support for your iPad or Bluetooth keyboard's digits and operators.
  • Big values: results that outgrow 64 bits fall back to arbitrary-size integers instead of overflowing silently.

Debugging is a multi-panel job

Masking flags while tallying byte offsets? Keep programmer mode in one panel and a basic or scientific panel beside it. Push the decimal result of 0xFF & 0x3C to the shared tray and use it in ordinary arithmetic next door. That workflow doesn't exist in single-view programmer calculators.

Free vs. Premium, honestly: the free app includes 2 panels, basic mode, 3 converter categories, and your last 10 history entries — no ads, no time limits. A one-time $2.99 purchase (no subscription) unlocks scientific and programmer modes, up to 8 panels, the shared value tray, all 10 converter categories, full history with search and CSV export, and all themes and button styles.
CalcBoard programmer calculator on iPhone showing one value in binary, octal, decimal and hexadecimal simultaneously
One value, four bases, zero toggling

Frequently Asked Questions

Does CalcBoard show binary and hex at the same time?
Yes — programmer mode displays BIN, OCT, DEC, and HEX simultaneously, with binary grouped in nibbles. Tap any base row to make it the input base.
Which bitwise operations are supported?
AND, OR, XOR, NOT, left shift (<<), and right shift (>>), plus integer add, subtract, multiply, truncating divide, and parentheses.
Can I convert hex to decimal quickly?
Instantly — type the value in HEX and read the DEC row (and BIN and OCT) without pressing anything else. It works in reverse from any base.
Is programmer mode free?
Programmer mode is part of Premium ($2.99 one-time, no subscription). The free app includes the basic calculator, 2 panels, and starter unit converter with no ads.

A programmer calculator that keeps up

Four bases at once, honest bitwise ops, and panels for the rest of your math.

Download Free on App Store

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