# MathNotes - Notes that Count > Write notes that solve themselves. Type = to calculate. No ads. No tracking. Canonical page: [https://chrome-stats.com/d/com.zgt.mathnotes](https://chrome-stats.com/d/com.zgt.mathnotes) ## Overview - **ID:** `com.zgt.mathnotes` - **Platform:** Android - **Type:** Android app - **Status:** Available - **Publisher:** JUJUMI TECH - **Category:** TOOLS - **Downloads:** 2 - **Version:** 1.4.19 - **Last updated:** 2026-08-30 - **First published:** 2026-08-19 - **Publisher country:** CN - **Size:** 2.90 MB - **Data as of:** 2026-09-14 - **Store listing:** [Google Play Store](https://play.google.com/store/apps/details?id=com.zgt.mathnotes) - **Website:** [https://jujumi.com.cn](https://jujumi.com.cn/) - **Privacy policy:** [https://jujumi.com.cn/mathnotes-privacy-policy](https://jujumi.com.cn/mathnotes-privacy-policy) ## Description 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. ## Rankings - #3,051,779 — Overall ## Permissions and access ### Permissions - `com.android.vending.CHECK_LICENSE` - `com.zgt.mathnotes.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION` ## Similar extensions and apps - [CalcNote: Notes & Calculator](https://chrome-stats.com/d/com.calcnote.notecalc) — 6 users - [Easy Note Calc](https://chrome-stats.com/d/com.dendigital.easynotecalc) — 43 users - [Smart Calculator with Notes](https://chrome-stats.com/d/com.appmintstudio.calculator.notes.calcnotes) — 97 users - [NoteCalc: Calculator](https://chrome-stats.com/d/com.kgstudio.notecalc) — 84 users - [CalcNotes - Calculation memo](https://chrome-stats.com/d/app.web.calculationnotes) — 4,286 users - [FuncNote](https://chrome-stats.com/d/app.funcnote) — 65 users - [Notor - Notebook Calculator](https://chrome-stats.com/d/com.webmastersamrat.notor) — 656 users - [CalcNote - Notepad Calculator](https://chrome-stats.com/d/com.burton999.notecal) — 1,032,260 users, 4.36 / 5 - [Calcnote Lite](https://chrome-stats.com/d/com.mathssolver.calcnote) — 3 users - [LetsCalc: Note & Calculator](https://chrome-stats.com/d/com.digieggs.letscalc) — 857 users - [CalcNote Pro: Smart Calculator](https://chrome-stats.com/d/com.flash.calcnote) — 67 users --- Source: [Chrome-Stats](https://chrome-stats.com/d/com.zgt.mathnotes)