Help

The map uses the gyroscope and the compass of your phone. Move away from metal and magnets (a car, a laptop, a magnetic case), then calibrate the compass by drawing a figure of eight in the air with the phone. You can always slide the map with a finger instead.

Allow the location for Astronomer in the settings of your phone (“while using the app” is enough) and check that the location of the phone is on. You can also choose an observing site in Settings › Observing sites.

The positions of the Sun, the Moon and the planets are computed to about an arcminute, and the times of rising and setting to the minute, for a flat horizon. Hills, buildings and the weather can change what you actually see.

The chance takes your place into account: the aurora is seen under the auroral oval, or low on the horizon up to about 1,000 km from it. Far from the poles, even a strong storm can stay out of sight. Clouds and daylight hide it too: the alerts wait for the dark.

Allow the notifications of Astronomer in the settings of your phone and choose the kinds of events in Settings › Notifications. The reminders are prepared by the app for your place: open it from time to time to keep them up to date.

In the free version, Observation mode is made for the night, from sunset to sunrise where you are; it turns itself off at sunrise. With Astronomer Plus it is available at any time.

In Settings, tap Restore my purchase, with the store account of the purchase. The purchase follows your store account: restoring it on a new phone moves it there.

Purchases are handled by the stores: on Google Play, from your order history (within 48 hours) or by writing to us; on iPhone, from Settings › Request a refund in the app, or from reportaproblem.apple.com.

In Settings › Delete my data. See what is deleted.