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High-precision scientific calculation with reusable expressions

A desktop calculator with recall and configurable precision

Scientific calculation with RPN and programmable functions

Statistical calculators linked to formulas and references

Browser tools for beam and structural calculations

Circuit and electrical formulas grouped by task

Emissions estimates for travel, homes and events

Editable notes with live scientific calculations

Notes, variables and arithmetic in a browser

Weather quantities with linked formulas

Plot equations and coordinate data in two or three dimensions

Garden supplies with calculators and plant-support collections

AI math solver and tutor with step-by-step answers, PDF homework help, and study tools.

Scientific calculation with expression history

Calculators for work, study and household questions

Brew-day volumes, temperatures and efficiency calculations

Product-based cloud cost estimates

Balance colour distinction and visual preference for categorical charts.

A free Android activity log with route maps, pace charts and no ads

Run tracking, audio-guided sessions and shared challenges

A map-tool collection for distances, areas and location lists

Desktop unit conversion with custom conversion definitions

Connect a nonprofit mission with the professional role you want

A natural-language calculator for units, dates, finance, and developer math.