Easy Note Calc

Easy Note Calc is a notepad you can do maths in. Write a line the way you'd write it on paper — "Rent: 1,200" or "Tile: 61.50 × 32" — and the answer appears beside it. Nothing to set up, no cells, no formula bar.

Write it like a note

Put a label before a colon and it stays plain text. "Kitchen remodel — spring 2026:" is a heading, not a sum. Anything after the colon is the maths. Wrap an aside in double colons — ::quartz, installed:: — and it's a comment the calculator ignores. Your notes read like notes, and still add up.

Point at other lines with @

• @1 — the result of line 1
• @rent — every line containing that word, added together
• @s2 — the total of another saved note, pulled into this one

Change one number and everything pointing at it follows. Use @rent for a running subtotal and it updates as you add lines, without you touching it.

Months, filled in automatically

Every line with a number lands in the Months tab, grouped by the month you wrote it. See a month's total and how it compares with the month before. Switch to "By name" and every repeated word becomes its own running total for the year — tap one for a 12-month chart. There is nothing to categorise or tag. If you type "Rent" every month, Rent starts tracking itself.

A real calculator too

A full keypad with a running tape, kept and grouped by day, so yesterday's sums are still there tomorrow. Tap any past result to carry on from it. The same @ references work here — pull in a line, or a whole saved note's total, then send the answer back into your note.

Everything else

• Multiple notes, each saved as you type
• Scientific functions — sin, cos, tan, log, ln, sqrt, factorial, π and e
• 10 themes, five dark and five light
• Search across every note
• Share or export as text or as an image
• Undo and redo
• A tap-friendly keypad, or just use your keyboard

Your notes stay on your device

No account. No sign-up. Works completely offline. Everything you write is stored on your phone and is never uploaded anywhere.

Easy Note Calc is free, supported by ads.

Good for budgets, quotes and invoices, shopping totals, homework, unit conversions, job costing, splitting bills, or any time you want a scratch pad that does the adding for you.