I had some time between jobs and used it to scratch my own itch: building the simple, non-cluttered finance calculators I was always looking for but couldn't find without heavy tracking or confusing UIs.

I focused on privacy and simplicity from the start. The tools are free and collect zero data.

What I built:

A precise German Payroll Deduction Calculator (for planning job changes/salary negotiations).

Maybe i want to add a tool for personal budgeting & investing.

Current Tech Stack: Ive started for the tax app with python backend and the frontend in nextjs. The second app for investing im builing in sveltekit rn which I like alot more. SVGs are self-drawn paths

I'm sharing this to get feedback on the tools themselves. If you have any suggestions for the UI/UX, or other simple finance problems worth solving, let me know! Thanks alot!