Eos

Golden hour, sun and moon — planned to the minute

View the Project on GitHub jenow/eos-app

Support

Eos is made by one person. Email me and you will get a real reply.

kevin.blondel.bernard@gmail.com

When something is wrong, it helps enormously if you can say which device you are on, which version of Eos, and roughly where you were — the sun and moon answers depend entirely on location and date, so “sunset looked wrong” is much easier to chase with a place and a day attached.

Things people ask

The times look a few minutes off. For plain sunrise and sunset they should not be. If you have the terrain-aware times switched on, those are computed from a ground-height model: it knows about hills and mountains, but not about trees, buildings or the exact spot you are standing on. A few minutes of difference is expected there.

It says an eclipse is hidden, but the news says it is visible. Both can be true. Coverage figures in the press are for the country or the centre line. Eos works out the sun’s altitude at your coordinates and compares it against your actual skyline, so a 90%-covered sun that sits three degrees up behind a ridge is, for you, not visible.

Why does it want my location? To compute the sun, moon and horizon where you are. It is optional — you can pick a spot on the map instead, and everything works the same.

Does it work without a signal? The astronomy does: sunrise, sunset, golden hour, moon phase and eclipse geometry are all calculated on the device. Cloud forecasts, terrain heights, aurora, Space Station passes, map tiles and nearby photos need the internet. Lose signal and you keep the full sun, moon and eclipse picture.

Can I delete my data? Your spots, journal and reminders live only on your phone — deleting the app removes all of it. For analytics, email the address above and I will remove what can be identified. See the privacy policy.

Reporting something broken

If Eos crashes or gets an answer wrong, the most useful thing you can send is what you expected, what you got, and the date and place it happened for.