The best hp calculator 12c apps on iPhone average 3.9β across 249+ titles β we've ranked them by what real users actually keep on their phones. Updated September 2026.
Compare top Hp Calculator 12C Apps (September 2026)
This app emulates a classic RPN scientific calculator, offering advanced features like complex number arithmetic, matrix calculations, and programmability. It provides a functional and complex tool reminiscent of 1980s calculators.
What We Love
π Lightning-fast calculator
π Authentic look and feel of HP 15C
π Faster than real HP 15C
π Excellent RPN emulation
π Familiar interface for HP 15C users
π Great representation of original calculator
π Obvious labor of love by developer
Room to Improve
π Doesn't save settings, programs, or memory
π No key press feedback or sound
π Blinking display issue with large calculations
This app emulates the legendary HP 12c financial calculator with a redesigned interface and modern look. It preserves the precision and reliability trusted by professionals, offering built-in financial tools for business, banking, real estate, and education.
What We Love
π Modern Convenience of a Classic
π Made me Money
π Perfect
π Greatest of all times!
π Just like my handheld
π Emulator
π Finally works like my old dinosaur
π An Excellent Must Have
π Great App, It Makes Me Feel Fancy
π The Top Calculator Out There
π Best Update of Best Financial Calculator
π HP 12c App
π retired
π Very good
π n/a
π Oldie but goodie
π Head bottle washer
π HP12C owner
π HP Calculators
π Just like my old friend
π Better than ever β better even than the original HP calculator
π My one and only
π Great work!!
π HP 12c
π Great
Room to Improve
π Don't fix what's not broken
π In decline
π Step backward
π It used to work, but now it doesn't
π Major step backwards in design
π Major gap backwards in design
π Ruined app, now even worse, 10 negative stars!
π Retrograde upgrade - avoid.
π Retrograde update has spoiled the app completely
π Layout
π Don't care for recent upgrade.
π Keying is inconsistent
π Buttons don't respond well
π Terrible Update
π Awful Update - Destroyed for iPad
π Changed screen layout
π New Version Fails in Every WY compared with the previous version
This app offers a powerful RPN calculator with financial and scientific functions, mimicking popular industry-standard models. It includes programming capabilities and expandable flavors for diverse calculation needs.
What are the best hp calculator 12c apps for iPhone?
Retro 15C tops our hp calculator 12c apps ranking as of September 2026, with a 4.3-star average from 212 App Store ratings, and it's free to download.
Are there free hp calculator 12c apps for iPhone?
Yes β 15 of the top hp calculator 12c apps we rank are free to download, including Retro 15C and Touch RPN calc.
Does Retro 15C have ads or in-app purchases?
Retro 15C has no ads and has no in-app purchases, according to its App Store listing as of September 2026.
How many hp calculator 12c apps are on the App Store?
We track 249+ hp calculator 12c apps on the iOS App Store as of September 2026, ranked by rating, recency, and analysis of real user reviews.
What does the Retro 15C app do?
The Retro 15C app emulates a classic RPN (Reverse Polish Notation) scientific calculator. It offers a wide range of advanced mathematical functions, including complex number arithmetic, matrix calculations, numerical root finding, and integration.
What are the key features of this calculator app?
Key features include complex number arithmetic and trig functions, matrix calculations, a numerical root finder, numerical integration, statistical functions with linear regression, and full programmability. It aims to replicate the functionality of classic 1980s RPN calculators.
