go55c (o2s.emul.hp55c) on Google Play
Hewlett Packard HP 55 hardware emulator- run/timer/prgm slide: touch right part of led display- state saved so it is a 55C- timer mode now accurate (even at speed greater than x1)- program helper- back label (touch left part of led display)On S5 devices, long press the right hardware button to get the menu.