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Everyday calculation tools in one mobile app

Indirect tax calculation and compliance connected to business systems

Connect transaction taxes, filing and reporting to your business systems

Editable calculation tapes with comments and recalculation

Speaker enclosure and crossover calculation tools

Symbolic, numerical and graphical mathematics tools

Engineering calculations documented in natural notation

Residential building-envelope calculation reports

Energy-code calculations for commercial building projects

Structural calculations with visible formulas and references

Trace crypto cost-basis calculations and the lots behind each result

Plan project tasks, dependencies, resources, and costs with an offline desktop Gantt tool.

Calculate usage charges and inspect the details behind customer bills

Standard, scientific, programmer and date calculations

Residential HVAC load, selection and duct calculations

Natural-language calculation beside short notes

Observing calculators organized by telescope instrument

Practical finance, cooking and unit calculations

High-precision scientific calculation with reusable expressions

Focused browser calculators for statistical questions

Engineering formulas, reference data and calculation tools

Structural calculations linked to worked examples

Building-services calculations with visible equations

Solar position, photovoltaic and map calculations