[Alasdair]

It may be that Stellarium can do this... but I'm looking for an Android app that will allow me to plan ahead, so that I can look at the sky as it might be at say, 11pm next Wedesday night (supposing it to be clear), and work out what I might be able to see then.

There are certainly masses of astronomical apps, some free, some prohibitively expensive, but I don't want to have to try them all until I find one which suits me.

Thanks!