• Support for iPhone Duo: the calculator uses the full display when the phone is open and keeps clear of the camera cut-out, so no key is hidden. • The display shows an annunciator only while it is on, as on the real calculator; nothing is ghosted when the calculator is off.

Program files • Import Program… and Export Program… – a document icon on the bezel, between Settings and the handbook (File menu on the Mac). Save the program in memory to a file, share it, and load it again later. • Files are plain-text listings with the keycodes the calculator shows in Program mode, so they can be read and typed in any text editor. JRPN 11C listings load as they are. • A file can carry a title, the author, a description of each label, notes, and the modes the program was written for (DEG/RAD/GRD, User mode, flags 0–1). Import shows everything in a preview first and can set the modes for you. • A new Program Files chapter in the handbook describes the file format. Handbook • Find in the handbook: ⌘F on the Mac, the magnifier in the toolbar on iPhone and iPad. Fixes • The trial period is now counted correctly on every launch.

• Fast typing no longer loses keys. Each keystroke is handed to the calculator the moment it is ready for it, exactly as the original keyboard did. • Holding a key behaves as on the real machine: SST and BST scroll through program lines at the original pace, even with Real Speed off. • The Owner's Manual can now be searched: tap the magnifier, or press ⌘F on an iPad keyboard. • The Real Speed switch in Settings now does what it says. Off, the calculator runs about forty times faster than the original.

Completely revised Owner's Handbook The built-in manual has been rewritten from the original HP-11C Owner's Handbook and Problem-Solving Guide, page by page. It includes every example, program listing, table and diagram, redrawn to match the printed book. Displays and keys now look like the ones in the app, and the indexes are fully linked. Improvements • More reliable saving of the calculator state when you quit the app. • Keyboard input works immediately when the calculator opens.

Self-tests are here! This update brings the calculator's built-in diagnostic tests to life, working exactly as on the original hardware: • Self-test — hold × and ON: the ROM runs its full diagnostic and finishes with the famous all-segments display • Keyboard test — hold ÷ and ON, then press every key in sequence • Continuous self-test — hold + and ON for the endless diagnostic loop All three are also available from the Calculator menu on Mac. Under the hood: • More accurate emulation of the display driver hardware, verified against a real calculator • The display now shows the complete set of annunciators, positioned to match the original LCD glass • Improved handling of simultaneous key presses Thanks to the community at the Museum of HP Calculators forum for the sharp observations that led to this update!