# Calculator Plus All in One

> Pocket calculator tool: Scientific mode, unit conversion & financial math.

Canonical page: [https://chrome-stats.com/d/com.daotr.maytinh](https://chrome-stats.com/d/com.daotr.maytinh)

## Overview

- **ID:** `com.daotr.maytinh`
- **Platform:** Android
- **Type:** Android app
- **Status:** Available
- **Publisher:** Đào Trọng Hiếu
- **Category:** TOOLS
- **Downloads:** 3,731
- **Version:** 2.2.2
- **Last updated:** 2026-09-01
- **First published:** 2026-02-12
- **Publisher country:** VN
- **Size:** 42 MB
- **Data as of:** 2026-09-06
- **Store listing:** [Google Play Store](https://play.google.com/store/apps/details?id=com.daotr.maytinh)
- **Website:** [https://yd7e3b9ad.app-ads-txt.com](https://yd7e3b9ad.app-ads-txt.com/)
- **Privacy policy:** [https://docs.google.com/document/d/16wyukut\_0zWauguQwvdJQrQD5Dl\_jU7wHaI0SU6yd5o/edit?usp=sharing](https://docs.google.com/document/d/16wyukut_0zWauguQwvdJQrQD5Dl_jU7wHaI0SU6yd5o/edit?usp=sharing)

## Description

Every tool unlocked. No paywall on any calculator.<br><br>Solve equations step by step, work with matrices, take derivatives and integrals, and look up any of 118 elements - all offline, all free.<br><br>WHAT MAKES IT DIFFERENT<br><br>Step-by-step solutions<br>See how the answer was reached, not just the result. Linear, quadratic and cubic equations, plus 2-variable systems.<br><br>Formula library - 33 formulas<br>Physics, chemistry and math. Fill in the values you know and the app solves for whichever one is missing. Newton&#39;s second law, Ohm&#39;s law, molarity, dilution, law of cosines, compound interest and more.<br><br>Periodic table - 118 elements<br>Atomic mass, electron configuration, electronegativity, period and group. Grid view or list view, with search.<br><br>Matrices up to 6x6<br>Determinant, inverse, transpose, rank, and solving linear systems.<br><br>Calculus<br>Symbolic derivatives and definite integrals, with a graph view.<br><br>Programmer mode<br>Binary, octal, decimal and hex. Bitwise operations, 8 to 64 bit widths.<br><br>Complex numbers and vectors<br>Polar form, nth roots, dot and cross products, angle between vectors.<br><br>Statistics and graphing<br>Mean, median, mode, standard deviation, variance. Plot multiple functions at once.<br><br>EVERYDAY TOOLS<br><br>Currency and crypto conversion with live rates. Loan and savings interest with a full amortization schedule. Tax, tip, discount, BMI, GPA, fuel cost, unit price comparison, electricity bill. Length, area, speed, temperature and clothing size conversion. Fractions, percentages, date difference, geometry, bubble level.<br><br>BUILT TO BE PLEASANT<br><br>- Works fully offline, except live exchange rates<br>- 11 languages<br>- Calculation history with timestamps, tap any entry to reuse it<br>- Tap anywhere in the expression to edit that exact digit<br>- Landscape mode on the main calculator<br>- Search box and favorites in the tool drawer<br><br>Premium removes ads and unlocks extra color themes. Everything else is free, permanently.

## Rankings

- #783,798 — Overall

## Permissions and access

### Permissions

- `android.permission.ACCESS_ADSERVICES_AD_ID`
- `android.permission.ACCESS_ADSERVICES_ATTRIBUTION`
- `android.permission.ACCESS_ADSERVICES_TOPICS`
- `android.permission.ACCESS_NETWORK_STATE`
- `android.permission.CAMERA`
- `android.permission.FOREGROUND_SERVICE`
- `android.permission.INTERNET`
- `android.permission.WAKE_LOCK`
- `com.android.vending.BILLING`
- `com.android.vending.CHECK_LICENSE`
- `com.daotr.maytinh.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION`
- `com.google.android.finsky.permission.BIND_GET_INSTALL_REFERRER_SERVICE`
- `com.google.android.gms.permission.AD_ID`

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Source: [Chrome-Stats](https://chrome-stats.com/d/com.daotr.maytinh)