MathNotes - Notes that Count

Write your math the way you think it. End any line with "=" and the answer appears instantly, right in your note. ■ As natural as thinking No switching to a calculator, no copy-paste. Shopping lists, bill splitting, budgets, quick engineering checks — write and calculate in one place. Change a number, every result updates live. ■ Variables bring notes to life Define once: coffee = 4.5 Use anywhere: coffee × 5 = 22.5 Edit the definition and everything recalculates. ■ Built-in calculator A clean, standard four-function calculator with smart percent (100+5%=105), sign toggle, and smart repeat. Live result preview (light gray) shown above the input; tap ⌫ to delete a digit. After pressing =, the result appears right after the equals sign and the preview disappears — type a new digit to start a fresh calculation. press = repeatedly to keep going (5 + 3 = = = → 8, 11, 14), or press = right after an operator to repeat the last operand (5 + = → 10). ■ Full math, right in your notes Type `rent + coffee × 30 =` and the answer appears in orange instantly. Arithmetic, parentheses, percentages (20 + 20 × 15% = 23) all work inline as you write. Engineering math is just as easy: trig in degrees (sin(30°) or sin(deg(30)) = 0.5), scientific functions (sqrt/sin/cos/tan/asin/exp/ln/log2/hypot/mod/cbrt…), and unit conversion (100 km → mi, 25 °C → °F). Very large or small results switch to scientific notation automatically. ■ Built-in how-to guide Not sure where to start? The Settings → About screen now includes a "How to use notes" guide covering inline = calculation, scientific functions, angles and cross-line variables — open it and try along. ■ Ready to use on first launch Ten pre-filled life-example notes (monthly budget, dinner splitting, trip cost sharing, coffee spending…) ship with the app. Tweak a number to see how "notes + calculator" works — or just delete them. ■ Why $7 ? Because you are the customer, not the product: • No ads — ever • No tracking — the app requests ZERO permissions, not even internet • No accounts — your data never leaves your device • No in-app purchases — pay once, keep forever ■ Modern Android Clean light and dark themes with orange result highlights, fully offline, system backup & device-transfer support. Notes body font size is adjustable (14–30) and applies instantly. A pen, a page, an answer. That simple.