Advanced Math, Graphs, Units, Projects
Calculate, convert, graph, solve.
Engineer Calc: All-in-One is an offline scientific and engineering calculator for students, engineers, electricians, programmers, builders, mechanics, physics users, and technical teams. It combines Basic, Engineering, Programmer, RPN, Matrix, Vector, Complex, graphing, formula, unit conversion, history, export, backup, and project workflows in one Android app, with 37 engineering tools such as metal weight, plot area by coordinates, and stepped footing concrete. Every calculator mode, the whole unit converter, graphs, and all 37 tools are free; Pro adds professional local workflow upgrades through Google Play as a one-time Lifetime unlock or a Monthly subscription.
Basic and engineering calculator modes include ANS, memory, constants, powers, roots, logs, factorials, percentages, and degree/radian trigonometry. RPN, matrix, vector, complex, and equation-solving workflows are part of the free app. Programmer mode covers BIN/OCT/DEC/HEX, signed and unsigned values, 8/16/32/64-bit word sizes, AND/OR/XOR/NOT, shifts, rotates, ASCII/Unicode, Unix time, Base64, and URL utilities.
Metal weight for flat, round, square, and hexagon bars, sheet, round, square, and rectangular tubes, and equal and unequal angles in steel, stainless steel, aluminum, copper, brass, cast iron, titanium, or a custom density, with kg/m and total kg. Plot area by coordinates for 3 to 50 vertices in m², hectares, and ft², with a warning when edges cross. Stepped or tapered footing concrete, concrete, tiles, paint, plaster, rooms, bricks, slope, stairs, Ohm's law, dividers, series/parallel resistance, resistor color code, LED resistors, RC/RL/RLC, torque, gears, beams, springs, friction, work, kinetic energy, momentum, gas law, concentration, pH, geometry, and more.
28 categories, from length, area, pressure, torque, and flow to conductance, electric charge in mAh and Ah, magnetic flux density, and luminous flux. The input accepts arithmetic, so 2*500 or (7+3)/2 converts directly. Favorite pairs stay one tap away; custom linear units come with Pro.
Calculations, formulas, the converter, graphs, settings, local history, custom formulas, custom units, keyboard macros, encrypted backup payloads, backup versions, and project records are stored in the app on your device, and the calculator, converter, graphs, and tools work without a network connection. Google Play needs the internet for Pro purchases, restore, and the rating prompt.
Optional Pro comes as a one-time Lifetime unlock or a Monthly subscription. It unlocks unlimited local history and projects, expanded custom formula and custom unit workflows, keyboard macros, advanced graph presets, saved templates, CSV/PDF exports, local encrypted backup/restore, local backup versions, and additional customization. Everything free stays free, including all 37 tools.
Searchable history with pinned entries, notes, tags, and type filters. Projects hold calculations, graph analyses, folders, notes, tags, and templates. With Pro, export reports as PDF, CSV, text, JSON, and SVG graph files; PDF reports print in all 14 app languages, including Cyrillic, Arabic, and Hindi. Manual JSON import/export, encrypted backups, and backup versions keep work portable under your control.
Supports English, Spanish LATAM, Brazilian Portuguese, Russian, Ukrainian, Indonesian, Hindi, Arabic, German, French, Spanish, Slovak, Czech, and Polish.
Built for system text scaling, TalkBack labels, high contrast color, portrait and landscape use, and tablet-friendly navigation.
Lifetime unlock: engicalc_pro_lifetime. Monthly subscription product: engicalc_pro. The yearly plan (yearly_annual) is no longer sold; a yearly subscription already bought keeps Pro active. Prices, taxes, renewals, cancellation, and restore availability are shown by Google Play for the user's country and account.