Visual Math 4D vs TimeToSkill

Visual Math 4D is a graphical calculator that allows you to visualize and solve your mathematical equations. It supports various types of equations, such as polar, spherical, parametric and implicit equations, which can be visualized and animated in 2D and 3D. You can also plot and animate vector fields in 2D and 3D. Features: - solve equations - plot cartesian functions with intersections - plot polar- and spherical functions - plot parametric equations in 2D and 3D - plot complex functions (draw real part & imaginary part) - plot vector fields in 2D and 3D - plot implicit equations in 2D and 3D - plot contour maps ins 2D and 3D - support for complex numbers - vectors & matrices - truth- and value tables - trigonometrical and hyperbolic functions - piecewise-defined functions - logarithmic functions - logical & binary operators - definite integral - n-th derivations - statistical functions (nPr, nCr, rand..) - physical and mathematical constants with their units - animate variables - share content with other apps - no network connection required - and a lot more The app is easy to use and helps students and engineers to visualize and solve their mathematical equations.

Track your practice. See real progress. TimeToSkill helps you measure how much time you spend learning or practicing a skill — without logins, ads, or distractions. WHY YOU’LL LIKE IT • Timer & manual entry — log sessions your way • Counters — simple trackers for repetitions or occurrences • Insightful stats — Time Distribution histogram and a global view show where your time goes • Milestones — 20h, 100h, 1,000h to stay motivated • 40 skill suggestions to get you started (more coming) • Export to PDF when you need a clean summary • Offline by design — no account, no tracking BATTERY-FRIENDLY TIMING The timer reads the system clock instead of running constantly in the background, so it stays accurate and lightweight—even if you close the app. IDEAL FOR • Languages • Instruments • Exam prep • Sports • Hobbies • Deep work OPTIONAL Lifetime Pro (one-time unlock) lets you create your own skills and access all premium features. No tracking. No ads. Just you and your time.