Education Tools
SignalCalc
A free, hosted scientific calculator toolkit that helps students work through maths and science problems with clear formulas and familiar controls.
2026 / Education Tools / Expo / React Native / React / TypeScript showcase / Cloudflare
Quick read
A clear breakdown of the product, the reasoning behind it, and the implementation choices that matter.
- Year
- 2026
- Category
- Education Tools
- Status
- Free, public, and hosted
Overview
SignalCalc began as a small mobile calculator MVP and became a focused student toolkit. It combines a traditional scientific calculator with quick helpers for density, speed, Ohm’s law, and quadratic roots, keeping the formulas and units visible instead of hiding them behind a black-box answer.
Why it exists
Students need quick calculations, but a calculator is most useful when it also makes the setup, units, and method easy to understand.
How it works
SignalCalc uses a familiar scientific layout, accessible controls, safe arithmetic, and small formula-based helpers for common school maths and physics work. It is free to use, hosted online, and requires no account.
Built with
Expo / React Native / React / TypeScript showcase / Cloudflare
What I focused on
- Built a traditional scientific calculator with trigonometry, powers, logarithms, constants, brackets, and degree/radian mode.
- Added compact student tools for density, speed, Ohm’s law, and quadratic roots.
- Kept the guidance short and readable, with reminders about units, signs, and checking work.
- Shipped a lightweight, dependency-conscious MVP with local tests and a public hosted demo.
A calculator that teaches the setup
The toolkit is deliberately small. It helps with the calculations students meet often, while keeping the formula close to the result so the tool supports understanding rather than replacing it.