Advanced Math, Graphs, Units, Projects
Calculate, convert, graph, solve.
Engineering 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. The core calculator stays free; EngiCalc Pro adds professional local workflow upgrades through Google Play.
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 available without an account. 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.
Electronics, construction, mechanics, physics, chemistry, and geometry tools cover Ohm's law, voltage drop, cable sizing, voltage dividers, series/parallel resistance, current dividers, three-phase power, resistor color code, LED resistors, RC/RL/RLC, concrete, tiles, paint, plaster, rooms, bricks, slope, stairs, torque, gears, beams, springs, friction, work, kinetic energy, momentum, gas law, concentration, mass fraction, pH, and more.
The local work journal supports searchable history, pinned entries, notes, tags, and type filters. Projects can hold calculations, graph analyses, folders, notes, tags, templates, and exported PDF, CSV, text, JSON, and SVG records.
Calculations, formulas, converters, graphs, settings, local history, custom formulas, custom units, keyboard macros, encrypted backup payloads, backup versions, and project records work without an account, developer backend, ads, analytics, or cloud sync. Google Play is used only for optional Pro purchase and restore flows.
Optional Pro 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.
Export project reports and calculation evidence as PDF, CSV, text, JSON, and SVG graph files. Manual JSON import/export, encrypted backups, and local backup versions keep work portable under user control and outside any developer cloud service.
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.
Monthly subscription product: engicalc_pro. Yearly subscription product: yearly_annual. Lifetime unlock: engicalc_pro_lifetime. Prices, taxes, renewals, cancellation, and restore availability are shown by Google Play for the user's country and account.