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An iPad-first tutoring board that saves lessons as A4 pages in a book for each student.

Compare text contrast with its size, weight and colour direction in view.

Mortgage broker that compares lender rates and shows the real cost of each loan.

Algebra entry with solving, factoring and graphing modes

Scientific expressions with variables and numerical calculus

A notepad calculator with variables and calendar expressions

Current-limiting resistor calculations for LED arrays

A simplified photovoltaic energy-production estimate

Instrument-specific observing calculations

Room-mode calculations for rectangular and shaped rooms

Resolve, build, and distribute C and C++ dependencies with a recipe-based package manager.

Plan prepaid travel data with a separate calling-number benefit

Turkish and Mediterranean cooking from a home-kitchen perspective

Meal planning built around your saved recipes and an automatic grocery list

VidStats is a YouTube analytics platform with real-time tracking, competitor analysis, and creator tools.

Formula calculators with selectable input units

Practical finance, cooking and unit calculations

Construction and everyday calculations with searchable tasks

A catalogue of practical and specialist calculations

Scientific and everyday calculations with units

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