Graphable
Write to jacksongathondu@gmail.com. Say what you typed and what the app showed, and a person will reply.
Check the syntax first. Multiplication is explicit, so 2x is written
2*x; powers use ^, as in x^3/10-3x; and every bracket
you open must close. Then check the window, because a curve can be plotted correctly and sit
entirely outside the range you set. Reset returns the window to the standard
range, which is the quickest way to find out.
It is almost always degrees against radians. The toggle sits beside the input and shows which mode is active. Trigonometric functions use whichever is selected.
A complete scientific calculator and function plotter, for as long as you want it. It is meant to finish the work that made you install the app. It does not keep anything between sessions, and it does not include trace, intersections, roots, tables or regressions.
Trace, intersections, roots, value tables, regressions, and course workspaces, which are saved places per class holding their functions, data lists and window. One payment of $19.99. Nothing renews.
Tap Restore purchases on the unlock screen. That asks the App Store what the Apple ID signed in on this device already holds, and it charges nothing. The unlock is permanent and returns on any device signed in to the same Apple ID. If restore still finds nothing, check you are signed in to the Apple ID that made the purchase, then write to us with the date and we will help.
Assume not. Exam rooms ban phones, and we make no claim that any board permits this app. It is built for the hours when the hardware is not with you, not to replace it.
You cannot yet. There is no sync and no export, so workspaces live on the device they were made on. The unlock itself does move: sign in to the same Apple ID and tap Restore purchases.
Possibly, in that order of unlikeliness. The app is deliberately a 2D graphing and scientific calculator. A request that lands in the inbox counts for more than a guess made here.