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Solar-system ephemeris calculations with documented time spans

Depth-of-field and hyperfocal calculations

Cloud-service cost estimates with inspectable assumptions

Room-mode calculations for rectangular and shaped rooms

Unit conversion across everyday and specialist dimensions

Technical learning with courses and coding-practice platforms

Food comparisons, recipe nutrition and a connected diary

Nutrient and water calculations for planted aquariums

Arithmetic, finance and practical calculation worksheets

Topic-based calculators for practical questions

Construction and everyday calculations with searchable tasks

High-precision scientific calculation with reusable expressions

Arbitrary-precision arithmetic that keeps track of units

Arithmetic, finance and programming modes in one app

Statistical calculations with method-selection guidance

Statistical calculators linked to formulas and references

Research-statistics calculators for study interpretation

Focused statistics tools for research calculations

Structural calculations linked to worked examples

Panel cutting layouts and cabinetry cost calculations

Everyday calculation tools in one mobile app

Matrix-based numerical calculation and visualization

Symbolic calculation through a compact command interface

Molecular masses, formulas and isotope distributions