SigiCalc vs Trigonometric

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).

Learn trigonometry by seeing it move. Trigonometric turns every formula into something you can drag, spin and explore — free, with no ads, no accounts and no internet needed. UNIT CIRCLE • Drag point A round the circle or use the slider and play button • Change the radius OA and read x = OA·cos θ, y = OA·sin θ, arc length AB, circumference and sector area • Exact values such as √3/2, angles in degrees and as multiples of π, quadrant signs (All–Sin–Tan–Cos) and the tangent line 3D SPHERE — SPHERICAL COORDINATES • Place a point P(r, θ, φ) on a glass sphere you turn with your finger • See it converted to x, y, z and back, with top and side views • Explore the volume element r² sin θ dr dθ dφ GRAPHS • A rotating circle draws sin, cos and tan, projected straight onto the curve • Reshape y = A·f(Bx + C) + D with sliders and read amplitude, period, phase shift and midline • Type your own formula — or try examples like a Fourier square wave, a damped wave or beats TRIANGLE SOLVER • Solve any triangle from three values: SSS, SAS, ASA/AAS and the ambiguous SSA case • Drawn to scale, with area, perimeter and every step of the working FORMULAS & QUIZ • A searchable cheat sheet of identities, the laws of sines and cosines and the special-angle table • Quick ten-question quizzes with an explanation after every answer Three colour themes, full iPad support and a side-by-side landscape layout. Made for students, teachers and anyone curious about trigonometry.