Rechenwerk: Hex & Binary Calc
Programmer calculator with RPN
$3.99 · Designed for iPad
Mix hex, binary and decimal in one line: %10001 + $123 + 32 + $A3 = 503. RPN like the HP-16C, words up to 64 bits, and every bit of the result in view.
Rechenwerk is the programmer calculator we always wanted in our pocket. Mix number systems in one expression, work in RPN like the HP-16C, and see every bit of your result.
HEX, BINARY AND DECIMAL. IN ONE LINE.
Write numbers the way an assembler reads them: $FF or 0xFF for hex, %1010 or 0b1010 for binary, @17 for octal, #42 for decimal — and mix them freely:
%10001 + $123 + 32 + $A3 = 503
A number without a prefix is read in the base you selected.
RPN LIKE THE HP-16C
• Stack lift, ENTER, x↔y, R↓, CHS — or switch to algebraic entry: 3 + 3 =, like any calculator, with a live result
• An unlimited stack that scrolls above X, or the classic four levels
• Tap a level to use it again, swipe it into X or away
• 16 registers with STO and RCL
EVERY BIT IN VIEW
• Word sizes from 1 to 64 bits; unsigned, 1's or 2's complement
• The value in HEX, DEC, OCT, BIN and as characters ('ILBM')
• A bit grid: tap a bit to flip it
• Drag across bits to read a field — its value and its mask, perfect for hardware registers
• Carry and overflow flags, rotate through carry, count bits, set / clear / test bits
• Float mode shows the IEEE-754 bits of a double
MADE FOR DAILY WORK
• Hold any number to copy it — hex and binary keep their prefix
• Paste into the display when the clipboard holds a number
• Undo and redo every step, even an accidental AC
• A tape of every calculation
• bswap, wswap, clz, ctz, bitrev, maskl / maskr and more in algebraic mode
• Portrait and landscape — and on iPad any window size: the calculator scales to fill it, and where there is room, every function gets a key of its own
• With a keyboard on iPad or Mac: type digits, operators and prefixes, Return for ENTER, ⌘Z to undo
PRIVATE BY DESIGN
No account, no ads, no tracking. Rechenwerk works offline; nothing you calculate leaves your device.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
On iPad, and in larger windows on a Mac, every function now has a key of its own, without f — wherever there is room for it.
If Rechenwerk has been useful to you for a while, it now asks once whether you’d like to rate it — never while you’re typing. Ratings help other programmers find the app.
The developer, Mark Wirblich, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Mark Wirblich
- Size
- 41.6 MB
- Category
- Utilities
- Compatibility
Requires iOS 16.4 or later.
- iPhone
Requires iOS 16.4 or later. - iPad
Requires iPadOS 16.4 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Bytes Brigade
