RPN vs Apini

RPN-38 CX is the first photo-realistic simulation of Hewlett-Packard's popular high-end programmable business calculator HP-38C for the iPhone. Produced from 1979 through 1983, it was the "Chive" member of the third-generation HP calculators known as the "Spice" series. While the simulator works like the original calculator, a number of carefully designed extensions make it a lot easier to use. RPN-38 CX is fully compatible with the HP-12C, except for calculations and programs involving Bonds and Depreciation. Features: • Photo-realistic look-and-feel • Programmable (99 steps, program memory not shared with register memory) • Subroutines, flags, loop control, extended conditional branching • Insert and delete steps with automatic address correction • 20 registers, "continuous", with unlimited store/recall arithmetic • Indirect register addressing • Register view • Program listing view • Program library view • Additional functions (nominal and effective interest rate) • Shortcuts for often-used key combinations • Store and retrieve any number of programs • Sharing: e-mail, AirDrop, Dropbox, copy, paste, print • 40 programs pre-installed Calculator functions: • Percentage (%, ∆%, %Total) • Simple and Compound Interest • Optional odd periods (like HP-12) • Nominal/Effective interest rate conversion • Amortization • Discounted Cash Flow Analysis • Net Present Value, Internal Rate of Return • Date and Calendar (actual or 30/360 day basis) • Statistics (mean, weighted mean, standard deviation) • Linear Regression • Additional functions not found on the HP-38: - Subroutines, flags, loop control, random number, Pi, Log, x² and more Details: cuveesoft.ch/rpn38

Apini ends on 30 September 2026 Apini is being discontinued. 30 September 2026 is the last day the app and its cloud services can be used. After that the servers are switched off. The app stops working, and anything still in Apini can no longer be retrieved. If you use Apini, please export what you want to keep before then. Open your Honeycomb, open the three-dots menu and choose “Export Excel”, or open apini.cloud in a browser and copy your items over to other systems. If you have a lot of Honeycombs, write to info@apinilabs.com and we’ll prepare a bulk export for you while the system is still running. The free and open building blocks Apini was built on stay free and open. We’re working on giving them a lasting home, independent of any single company - more on that soon. Today you can find them at labfreed.org.