Do ads cover the moon?

No. The app is free and shows ads, but they are placed so they never cover the moon or the phase details.

Is there a moon phase widget?

Yes. The home screen widget shows tonight's moon and the next full moon without opening the app.

Does it only tell me how many days until the full moon?

No. The next full moon, new moon, first quarter and last quarter are shown with date, weekday and D-day.

What if it can't detect my location or find my city?

Phase, illumination, moon age and upcoming phases need no location at all. Location is used only for moonrise and moonset: an approximate location is taken once and stored only on your device, so there is no city search to fail.

Could it show the moon phase for the wrong day?

It computes the moon on the device from your phone's current date and time zone, so you see tonight's moon. Phase times match published times within minutes.

Does it work offline?

Yes. All calculations happen on the device, so no internet connection is needed.

Do I need an account?

No. Install it, open it, and tonight's moon is there.

I just want a simple app. Is this it?

That is the idea. The first screen is tonight's moon and the next phase dates; the calendar, reminders and widget are there when you want them.

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When is the next full moon? How to find the date and time

Full moons come around roughly every 29.5 days (the synodic month averages about 29.53 days). Adding 29 or 30 days to the last full moon gets you close, but because the Moon's orbit is elliptical the exact timing shifts by hours each month, so the precise date and time come from an astronomical calculation or a published phase table.

A full moon is a moment, not a day

Astronomically, full moon is the instant when the Moon is 180° from the Sun in ecliptic longitude. That instant is the same everywhere on Earth, but converting it to local time can land it on different calendar dates.

If full moon happens at 02:00 UTC, it is 11:00 the same day in Seoul (UTC+9) but 21:00 the previous day in New York (UTC−5). That is why two websites can list full moon dates one day apart: they are using different time zones.

Why "days until full moon" is not enough

A countdown tells you how far away the full moon is, but not which evening to plan for. A date, weekday and local time answer the real question: can I see it on Friday night?

To the naked eye the Moon looks almost full for about a day on either side of the exact moment, so the night before and the night after work well for moon-watching too.

How to check the next full moon

A simple routine:

Use a moon app or phase table that calculates in your own time zone.
Look at the date and time, not only the number of days left.
If you want to watch it rise, check moonrise: a full moon rises around sunset and sets around sunrise.
Set a reminder for the day before so you don't miss it.

How Lunadot does it

Lunadot calculates the next full moon, new moon and quarters on your device in your phone's time zone and shows each with date, weekday and D-day. Phase times match published times within minutes, and you can get an evening reminder the day before a full or new moon. It works offline.

See the next full moon as a date

Get Lunadot on Google Play