my11c

The scientific calculator that defined an era — now in your pocket.

my11C brings the legendary 11C Voyager series scientific calculator back to life with cycle-accurate emulation running the original microcode. Every keystroke, every display flicker, every RPN operation — faithfully reproduced.

WHY ENGINEERS LOVED THE 11C

The 11C wasn't just a calculator — it was the trusted companion of engineers, scientists, and students throughout the 1980s. Its blend of powerful scientific functions, full programmability, and the legendary efficiency of RPN made it a desk-and-pocket classic. Decades later, it remains a benchmark of how a calculator should feel.

FEATURES

- Cycle-accurate emulation — runs the original Voyager microcode, not a simulation

- Full RPN entry — the efficient Reverse Polish Notation 4-level stack

- Programmable — write, store, edit, and run programs just like the original (up to 203 lines)

- Complete scientific function set — trigonometric and inverse trig in DEG, RAD, and GRAD

- Logarithms and exponentials — LN, LOG, e^x, 10^x

- Powers, roots, reciprocals, factorial, and percentages

- Statistics — mean, standard deviation, and linear regression

- Permutations and combinations

- Random number generator

- Rectangular to polar coordinate conversion

- Hours-minutes-seconds conversions

- Display formatting — FIX, SCI, and ENG notation

- Conditional tests and flags for real programming

- Authentic 7-segment LCD display with all original annunciators

BUILT FOR TODAY

- iCloud sync — your calculator state follows you across devices

- Native on iPhone and Mac — landscape optimized on iOS, resizable window on macOS

- Full keyboard support on Mac — type numbers and operators directly

- Dark interface faithful to the original Voyager design

- Built-in Owner's Manual for quick reference