SigiCalc vs Wave Simulator Lab by CS

SigiCalc is a fast, clean RPN calculator that draws your functions. Enter a calculation the RPN way – numbers first, then the operation – and as soon as your expression contains X, tap Graph to see it plotted. No equals key, no parentheses, no fuss. REAL RPN • Classic stack-based entry with Enter, Undo and All Clear • Keys light up only when the stack has enough values – you can't make an invalid entry • The display shows your result, the whole expression in normal notation and the raw stack LIVE FUNCTION GRAPHS • Use X as a variable and plot the result instantly • Pinch to zoom, drag to pan, tap to zoom in, double-tap to reset • Touch and hold to read the exact x / y value on the curve • Discontinuities like tan(x) or 1/x are drawn correctly – no misleading vertical lines SCIENTIFIC FUNCTIONS sin, cos, tan and their inverses, natural log, square, square root, reciprocal, sign change and π DESIGNED FOR TODAY'S DEVICES • Light and Dark Mode, portrait and landscape • iPad: calculator and live graph side by side • Smooth animations and haptic feedback PRIVATE BY DESIGN SigiCalc works entirely on your device. No account, no network, no ads, no tracking. Example: X ↲ X sin × plots x · sin(x). What changed versus your text and why: - Leads with a benefit, not a category: "draws your functions" is the hook; "simple and practical graphical" told the reader nothing they'd search for. - Explains RPN in one sentence for people who don't know it, since that's the biggest reason someone bounces. - Bulleted feature blocks — App Store descriptions are skimmed, and the capitalised headings scan well in the store's plain-text rendering. - Adds Dark Mode / iPad / privacy, all of which are new in 3.0 and are things reviewers and users look for. - Fixed "polish" → "Polish" and "equation" → "expression" (you plot expressions, not equations).

Wave Simulator Lab is a beautifully designed, hands-on physics simulator for students, teachers, and curious learners. Slide the controls and instantly see how frequency, amplitude, and wavelength shape a wave — no math headaches, no equipment, just pure visual understanding. From a single sine wave to interference patterns, standing waves, damped oscillations, and real audible tones — every feature is paired with clear explanations, interactive controls, and ready-to-share visuals. Built for classrooms, study sessions, and after-school curiosity. WHY LEARNERS LOVE IT • See physics, don't just read it — every parameter updates the wave instantly • Friendly UI built for touch, with smooth animations at 60 fps • Clear, jargon-free explanations next to every concept • Quiz pack with answers explained, so mistakes turn into lessons • Designed for iPhone and iPad, light & dark mode supported FREE FEATURES • Real-time animated sine wave • Frequency, amplitude, and wavelength sliders • Automatic wave speed and period calculation • Play / pause / reset controls • Grid and axis toggles • Light, dark, and themed appearances • Basic learning library • Quiz pack with explanations UNLOCK ALL FEATURES (one-time purchase) • Remove all ads forever • All wave types — cosine, square, triangle, sawtooth, pulse, standing, damped • Compare two waves on one graph • Interference & superposition mode • Standing wave & damped wave modes • Sound wave tone generator (hear what you see) • Advanced measurement tools (ω, k, T, v) • Export wave images to share with classmates or teachers • Save unlimited custom presets • Full learn library + full quiz library • Extra themes (Space Wave, Graph Paper, and more) GREAT FOR • High school & university physics students • STEM teachers preparing live classroom demos • Homeschool families exploring science visually • Sound engineers and curious tinkerers • Anyone who wants to finally "get" waves NO SUBSCRIPTIONS. Pay once, keep forever. All your presets and preferences live safely on your device. Made with love for science classrooms and self-learners everywhere.