Support

Last updated: 27 August 2026

Moon Lunation is an app for iPhone and iPad published by TraLand.com. If something is wrong, or a number looks off to you, write to us and a person will read it.

What to include

• Your device and iOS version.
• If a phase or a time looks wrong: the date you were looking at, what the app showed, and what you expected. The date matters more than anything else.
• What you expected to happen, and what happened instead.

Common questions

The Moon in the sky doesn't look like the picture in the app.

It probably won't, and that is expected. The app draws a schematic north-up geocentric phase diagram. The real Moon appears rotated by an amount that depends on your latitude and the time of night — near the equator a "half" moon can look like a bowl. The illuminated fraction is right; the orientation is not meant to match your view.

Why can't I pick my city any more?

The 2009 version had a fixed city list. It has been removed, along with all location features. Times shown are geocentric — computed for the centre of the Earth. The app never asks for your location.

Does it show moonrise and moonset?

No. Those depend on your exact position and horizon, and the app has no location feature.

Will it tell me about eclipses?

No. Phases come from Sun–Earth–Moon geometry; an eclipse additionally requires the Moon to pass through Earth's shadow, which is a separate calculation the app does not do. A full moon shown here is not a prediction of a lunar eclipse.

Why won't it show me a date in 1975 or 2090?

The app covers 1 January 2000 to 31 December 2050. Outside that range it tells you it cannot answer rather than showing you something that looks plausible and is not.

Why is the Cycle animation a different length each time?

Because real lunations are. The Cycle runs between two actual consecutive computed new moons, so its length varies. It is deliberately not forced to the average of 29.53 days.

What happened to my old data?

Nothing — the app does not touch it. If you had the 2009 version, its moondb.sqlite file may still be on your device. Moon Lunation never opens, migrates or reports it, and leaves it exactly as found. There is nothing of yours in it either way: it is a reference database that shipped inside the 2009 app, which never wrote to it. See the Privacy Policy.

Does it work offline?

Entirely. There is no network code in the app at all, so there is nothing to fail on a plane or in a basement.

Refunds

Purchases go through the App Store, so refunds are handled by Apple rather than by us. Use reportaproblem.apple.com. If something is broken, please tell us too — we would rather fix it.

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