GO vs Rift Valley Timer

GO-25 SciRPN simulates the venerable HP-25C Programmable Scientific Calculator from 1976. Virtually indistinguishable from the real item in operation, GO-25 is a powerful yet simple retro calculator. • RPN (Reverse Polish Notation) • 10-digit LED calculator display, 10-99 to 10+99 • Four stack registers with roll down • Ten storage registers with arithmetic memory operators • Math, trigonometric, polar/rectangular, sexagesimal/decimal, logarithmic, statistical, power and other miscellaneous functions • Programmable, with annotated program listing, and memory for 99 program steps • Library of Sample Programs • Fast, slow or single step program execution • Program import via pasteboard or from other Apps • Program export via printer, email, pasteboard or to others Apps • iTunes program File Sharing • Two additional windows with views of: ◦ stack/storage registers ◦ keystroke log ◦ program source code ◦ program documentation • Copy-from and Paste-to the calculator display • Simple Paper Tape annotations

RiVal.T is a powerful, distraction-free countdown timer app. Create and manage groups of sequential timers, each with customizable sounds, vibration, and visual alerts. The app features: Sequential Timer Groups: Organize timers into groups that run one after another, with optional transition beeps and customizable alarms for each group. Drag and drop timers between these groups. Flexible Timer Editing: Set start, warning, and final thresholds for each timer, with intuitive picker wheels for hours, minutes, and seconds. Instantly see which phase you’re in with green, yellow, and red color cues. Three Distinct Timer Displays: Choose between a retro numeric LED, a circular progress donut, or a traffic light-style display, all designed for maximum visibility and minimal distraction. Gesture and Toolbar Controls: Start, pause, rewind, or fast-forward timers with simple gestures or an optional on-screen toolbar, making the app perfect for both quick access and hands-free operation. RiVal.T brings clarity and precision to your timing needs, whether you’re on stage, in the gym, or managing complex routines.