SymboCalc vs AmberCue

SymboCalc is a symbolic calculator that gives you exact answers, not just decimals. Factor a polynomial, solve an equation for a variable, differentiate, integrate, invert a matrix, then plot the result... all in one app, all on your device. EXACT BY DEFAULT Results stay exact: 1/3 is 1/3, not 0.3333. Radicals, fractions and complex numbers are kept symbolic and typeset as real mathematics, with stacked fractions, proper radicals and matrix brackets. Tap any answer to switch it to a decimal, and tap again to switch back. ALGEBRA Expand, factor, simplify, collect, partial fractions, proper fractions, common denominators, polynomial division and GCD, trigonometric expansion and collection. CALCULUS Derivatives to any order, indefinite and definite integrals, limits including one-sided limits and limits at infinity, Taylor series, summations and products in closed form, arc length, numeric derivatives and integrals, and differential equations with initial conditions. EQUATIONS Solve exactly or numerically, over the reals or the complex numbers. Systems of equations, polynomial roots, and a dedicated numeric solver where you fill in what you know and solve for the rest. MATRICES AND VECTORS Determinants, inverses, rank, RREF, eigenvalues and eigenvectors, characteristic polynomials, LU and QR, null space, dot and cross products — with symbolic entries, not just numbers. GRAPHING Functions, implicit equations, inequalities, parametric curves, polar curves, sequences, differential equations with slope fields, and rotatable 3D surfaces. Pan and pinch, trace, and find zeros, minima, maxima, inflection points, intersections, tangents and areas. Logarithmic axes and sliders for free parameters are built in. STATISTICS One- and two-variable statistics, ten regression models from linear to logistic and sinusoidal, and the normal, t, chi-square, F, binomial and Poisson distributions. MORE Unit conversion with dimensional analysis and physical constants. Base and bitwise arithmetic in hex and binary. Time-value-of-money and cash-flow functions. A programming language with loops and conditionals. Tables of values. Saved worksheets you can export as PDF. BUILT FOR TYPING MATHS One keypad, no modes. A strip of operations sits above it — solve, factor, expand, d/dx, integral — and the full function browser is one tap away, with an example you can run for every function. The letter keyboard is there when you need a name, and gone when you do not. PRIVATE BY DESIGN SymboCalc collects nothing and makes no network requests. There is no account, no tracking and no advertising. Your work stays on your device.

AmberCue is a simple timer designed for classes, academic presentations, lectures, and seminars. Set your presentation time and place Cues wherever you want to be notified along the way. When a Cue is reached, AmberCue lets you know with light, sound, and haptic feedback on iPhone. For example, for a 15-minute presentation followed by 3 minutes of Q&A, you can set a preliminary Cue at 10 minutes, the main Cue at 15 minutes, and a final Cue at 18 minutes. 【Everything you need at a glance】 A large, simple display makes it easy to keep track of time while presenting. Tap the time to switch between remaining and elapsed time. Once the standard time has passed, AmberCue clearly shows how long the presentation has run over. 【Set Cues for important moments】 In addition to the standard time, you can set up to four Cues before or after it. When a Cue is reached, AmberCue can notify you with light, sound, and haptic feedback, so you can stay aware of important time points without constantly checking the clock. 【Save your favorite setups】 Save frequently used timer setups as Presets for classes, presentations, lectures, and other situations. Your usual setup is ready whenever you need it. 【Portrait or landscape】 AmberCue works on both iPhone and iPad. Portrait mode provides a visual overview of your progress, while landscape mode emphasizes a large, highly visible time display. It can also be used by moderators or session chairs to show speakers how much time they have left. 【Key Features】 • Standard time plus multiple Cues • Remaining / elapsed time display • Overtime display • Visual Cue notifications • Three Cue sounds • Haptic feedback on iPhone • Save frequently used setups as Presets • Portrait and landscape modes • iPhone and iPad support • No ads • No in-app purchases For classes, academic presentations, lectures, seminars, and anywhere else you need to keep a talk on time.