RPN vs RowSwift

World's first pocket computer! Now running on your iPad. RPN-65 Pro is the first complete simulation of Hewlett-Packard's stunning HP-65 programmable calculator for iOS. Produced from 1974 to 1977 at an initial price of $795 (that's more close to $5,000 today!), the HP-65 was a breakthrough. Not only was it programmable, it also contained a motorized magnetic card reader - and still fit into Bill Hewlett's shirt pocket. Experience this revolutionary calculator on your iPad. With 170 original HP programs included with RPN-65 Pro, you can get started right away. "A work of art. Fantastic!" (MacBreak Weekly, episode 572) Features: • Virtual program and data cards • Virtual paper tape printer supports AirPrint • Powerful database-driven card manager • Create, delete, label, and organize a virtually unlimited number of cards • Sharing: e-mail, AirDrop, Dropbox, copy, paste, print • Paste existing HP-65 listings into RPN-65 and run them • "Live" display of stack, memory registers, program counter, flags • Reads data cards created by RPN-67 Pro and RPN-97 Pro • Supports external hardware keyboard Run RPN-65 Pro in any of 4 modes: 1 - Just like the original HP-65 2 - Same, but at high speed 3 - Includes user-interface improvements, like backstep key and jump to any program step 4 - "Super-65" with 999 program steps, 120 labels, 120 registers, nested subroutines, and much more For details, free program downloads, calculator handbook and much more, visit the RPN-65 website: cuveesoft.ch/rpn65

RowSwift lets you explore and analyze comma-separated files right on your device. Open a CSV from Files, iCloud Drive, a URL, or the clipboard and inspect its structure. The app summarises each column by showing counts, unique values, minimum and maximum, mean, and quartiles. You can switch between histogram, box plot, scatter plot, pie chart, and line views to understand distributions and relationships. When a file is large, row filters help you focus on what matters while keeping scrolling smooth. You can save any chart as a PNG, and you can write data back to CSV. All processing stays on your device. RowSwift collects no analytics and requires no account.