Type maths and it is set out as you go: ^ for a power and / for a fraction (→ or a space leaves them), sqrt for a root, |x|, and sin, cos, ln, log_2, pi, theta … become symbols. For example y = 2x^2 - 3x + 1, x^2 + y^2 = 25, y <= 2x + 1, (cos t, sin t), r = 2 sin 3θ, (3, 4), f(x) = x^3 then y = f'(x); restrict with braces: y = x^2 {0 <= x <= 3}. The ⌨ keyboard has every function and some ready-made graphs; Settings has plain-text typing.

Drag to move · scroll or pinch to zoom · click a curve for its intercepts, turning points and intersections, then click a grey dot for its coordinates.