Most "best astronomy apps" lists push the same five paid mobile apps. The web has quietly become better for everyday questions like "when is the next full moon?" or "where will the eclipse pass?" — and most of the best tools are free.
Why the web beats the app store for astronomy The questions you ask about the sky are rarely "explore the universe in 3D". They are: a date, a time, a place. Web tools answer those in one second without a 200 MB install.
Full moon calendars For a Spanish-speaking audience, [Luna Llena](https://lunallena.co) gives a clean calendar of every full moon for the current year with traditional names. The English-language [Next Full Moon](https://nextfullmoon.co) ships a live countdown to the next event and flags supermoons. If you need the full table, our open dataset of [full moons 2025–2030](/data/moon-phases-2025-2030) is downloadable as CSV or JSON.
Eclipse tracking [Next Eclipse](https://next-eclipse.com) tracks the next solar and lunar eclipses with visibility maps. For the underlying data — every eclipse from 2025 to 2035 — see our [eclipses dataset](/data/eclipses-2025-2035), built from NASA Goddard records.
Sky maps and identification Stellarium Web is the gold standard if you want to see what's in the sky right now from your location. It runs in the browser, no install, no signup.
Open datasets you can build on If you're a developer building anything sky-related, our public API endpoints return JSON for the next full moon and next eclipse — see [/api/next-full-moon](/api/next-full-moon) and [/api/next-eclipse](/api/next-eclipse). No key required.
The shortlist - **Next full moon**: [nextfullmoon.co](https://nextfullmoon.co) (EN) or [lunallena.co](https://lunallena.co) (ES) - **Next eclipse**: [next-eclipse.com](https://next-eclipse.com) - **Live sky map**: Stellarium Web - **Raw data**: [furiosadata.com/data](/data/moon-phases-2025-2030)
All of the Furiosa Studio tools above are free with no account required.