Your sheets stay in this browser on this device. No login, no sync, no ads. Export JSON to keep a copy.
Write math and chemistry on a tablet or e-ink reader: an ink page for the pen, fractions, roots, Greek and scripts in a short notation, H2O and SO4^2- typed like a chat. Copy LaTeX or MathML, save PNG. Free, local, no account.
Formulapad typesets what you write. It does not solve, check or grade anything, and it does not recognise handwriting: ink stays ink.