my11c

The legendary scientific RPN calculator, faithfully reborn. Original microcode, cycle-accurate emulation — now on iPhone and Mac. Free trial included.

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