sincore

Android app for I&C technicians, electricians and metrologists. Converts thermocouple voltage to temperature (and back) for 8 types (K, J, T, E, N, S, R, B) based on the official ITS-90 characteristics (NIST). Cold-junction compensation, °C/°F/K units, IEC 60584-2 tolerances, a reference table and type descriptions. Fully offline, no accounts, no data collection. Version 1 is complete — ready to use, open to extension if a real need appears.

This website. Built from scratch on Next.js with two-language support, dynamic OG image and static site generation (SSG). Open source — my little frontend playground.

The problem: a demo license for scale measurement registration software was running out and there was no clear next step. I wrote a replacement from scratch — live readings, history stored in a database, CSV export. Runs on Windows 11, no license fees, no waiting for vendor support.

Auditors, labs and R&D teams need to work on current standards, but in Poland there's no tooling for it — PKN provides no API, no RSS, no newsletter. Norm Monitor is a desktop app (Windows) paired with a thin cloud feed: the app keeps your list of standards locally, and the backend scans PKN daily to notify you when something gets updated or withdrawn. The second feature — comparing two PDF versions of a standard — runs purely locally, because that's your legally purchased file. Comparison works on PDFs the app can actually read — scans (mostly older PKN editions) drop out because they're page images. Some text-based PDFs also use an unusual layout the app doesn't yet recognise. Project currently in active development.