Martin Hubálek — Notebook https://martinhubalek.cz/en/blog Notes on the apps I build (LingoSnap, Navixer and others), plus Angular and UX/UI craft. en-US Building a Weather Platform That Doesn't Blow Its API Budget https://martinhubalek.cz/en/blog/weather-intouch-jak-jsem-postavil-weather-platformu https://martinhubalek.cz/en/blog/weather-intouch-jak-jsem-postavil-weather-platformu Forecasts are a free commodity. The value is doing something proactive with them — without burning your paid-API budget. A case study of a full-stack TypeScript monorepo. Sun, 14 Jun 2026 00:00:00 +0000 Serving Thousands of Users With One Paid API Call per Location https://martinhubalek.cz/en/blog/weather-intouch-jedno-volani-na-lokalitu https://martinhubalek.cz/en/blog/weather-intouch-jedno-volani-na-lokalitu A paid weather API bills per call. A naive cache still kills you when 500 people in one city open the app the same second. The fix: two-layer single-flight. Fri, 12 Jun 2026 00:00:00 +0000 Doing Official Weather Alerts Right: CAP, Attribution, and Extensibility https://martinhubalek.cz/en/blog/weather-intouch-oficialni-vystrahy-cap https://martinhubalek.cz/en/blog/weather-intouch-oficialni-vystrahy-cap Government alerts are free and public — but "just display them" is a trap: different sources, severity scales, mandatory attribution, expiry, local time zones. Wed, 10 Jun 2026 00:00:00 +0000 A Readable Hourly Weather Chart: Chart.js, 4 Series, 7 Days https://martinhubalek.cz/en/blog/weather-intouch-hodinovy-graf-chartjs https://martinhubalek.cz/en/blog/weather-intouch-hodinovy-graf-chartjs An icon says "rain today." A chart says "rain 2–4pm, then wind picks up." How to fit 4 series and 168 hours into one readable Chart.js graph. Mon, 08 Jun 2026 00:00:00 +0000 A Smooth Precipitation Radar: Leaflet, Frame Crossfade, and Lazy Init https://martinhubalek.cz/en/blog/weather-intouch-radar-srazek-leaflet https://martinhubalek.cz/en/blog/weather-intouch-radar-srazek-leaflet The radar is the most "live" part of the app — and the heaviest on performance and privacy. How to animate it smoothly, load it only when seen, and handle third-party tiles. Sat, 06 Jun 2026 00:00:00 +0000 Why I Wrote My Own SSG Instead of Reaching for Astro https://martinhubalek.cz/en/blog/weather-intouch-vlastni-ts-ssg https://martinhubalek.cz/en/blog/weather-intouch-vlastni-ts-ssg For a three-page site in 20 languages, Astro or Next is overkill. A few hundred lines of esbuild and tsx do the same — and I understand every line. Thu, 04 Jun 2026 00:00:00 +0000 Free Data as the Backbone, Paid API Only for the Peak https://martinhubalek.cz/en/blog/weather-intouch-free-paste-i-placene-data https://martinhubalek.cz/en/blog/weather-intouch-free-paste-i-placene-data Open-Meteo covers most of the forecast for free. Paid OpenWeather is only touched for a few instant values — and if it drops, the app keeps running. Tue, 02 Jun 2026 00:00:00 +0000