• 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 use the .15c listing format of the JRPN 15C simulator, the HP-15C Simulator and rejig, so programs written there load in my15c and programs exported from my15c open there. • 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, Complex mode and flags 0–7. 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.

What's New in my15c 1.0.2 • Completely rewritten Owner's Handbook, faithfully based on the original HP-15C handbook: every chapter, example and program, now with redrawn diagrams, stack illustrations and graphs. • Display readouts in the handbook now look exactly like the calculator's LCD, including program lines and matrix descriptors. • New appendix: The Voyager Series in Brief. • Minor fixes and improvements.

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!