Developer builds free no-signup GPS altitude finder as a Progressive Web App

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A solo developer has launched Zirvə, a free Progressive Web App that displays a user's elevation above sea level without requiring an account, installation, or ads. The app primarily uses the Open-Meteo terrain elevation API for accuracy within 1–3 meters, falling back to the device's raw GPS altitude reading when offline. Because GPS chips measure vertical position far less reliably than horizontal position, the app clearly labels GPS-sourced readings as approximate to avoid misleading users. A service worker enables the app to load from cache when there is no internet connection, making it usable in remote areas such as above the treeline. The developer plans to add an elevation profile for tracked sessions and explore barometric pressure as an additional offline fallback.

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