Experience the most accurate HP-41CX calculator emulation. This app provides full microcode-level emulation of the original NUT processor, ensuring 100% hardware-accurate behavior. It features a modern interface, expandable ROM modules, and built-in documentation for a classic yet contemporary user experience.
What We Love
- 👍 Excellent emulation of HP calculators
- ✨ Faithful look and feel
- 💯 Perfect functionality
- 🚀 Works perfectly on phones/iPads
- 💡 Great for RPN calculator users
- 🌟 Best version found for iPhone
- ✅ Plug-in packs available
- 🚀 Much faster than before
- ✨ UI is well done
- 💖 Love this app
- 👍 Old HP41 rocks again
- ✨ Works like a charm again
- 💖 Loved it while it worked
- 💖 Awesome emulator
- 💖 My Old Friend
Room to Improve
- 🐛 Buggy on Mac
- 🤏 Small characters on buttons
- 🐛 Locks up when running programs
- 🐛 Crashes under iOS 13.2.3
- 🐛 Application quits after touching screen
- 🐛 Keys 'V' and 'W' inverted in ALPHA mode
- 🐛 GUI no longer accurate visual reproduction
- 🐛 Incompatible with IOS 13.2
- 🐛 Crashes systematically on hitting any key
- 🐛 App closes after launch
- 🐛 Not functional
- 🐛 Unusable
- 🐛 Crashes on startup
- 🐛 App closes when touching keys
- 🐛 Reverts to main screen when pressing buttons
- 🐛 Flashes on screen and disappears
- 🐛 Instant shutdown when trying to use it
- 🐛 Shuts down as soon as screen is touched
- 🐛 Shuts down when attempting to tap any key
- 🐛 Crashes constantly after IOS update
- 🐛 Closes the app as soon as you touch the screen
- 🐛 Stopped working with iso 13.3
- 🐛 Crashes as soon as I touch a key
- 🐛 Broken on iOS 13.2
- 🤏 Font for unshifted keys too small
- 📉 Functions faint and blurry
- 🐛 Freezes when executing commands
- 🐛 Low contrast
- 🐛 No key feedback
- 🐛 Unstable and crashes
- 🐛 Slow performance
- 🐛 Stopwatch function not real time
- 🐛 Memory not reliably retained
- 🐛 Loses all work
- 🐛 Massive memory leaks
- 🐛 Trashes program
- 🐛 Incredibly slow
- 🐛 Locks up
- 🐛 Glitches while switching modes
