Saturday Morning: Ents24
If you're stuck for ideas, the Ents24 app (from the online ticket vendor of the same name) will turn you on to music, comedy, gallery exhibitions and everything in between, as well as a more general 'days out' suggestion list for London
Platform: iPhone
Best Entertainment Apps | Best Apps

Saturday Morning: Foursquare
Social networking gets spatial. With Foursquare you can tag places you go - whether it's the office or the pub - and share recommendations and tips about them with the wider Foursquare community. Visit enough places and you'll start earning 'badges', making exploring more of a game.
Platform: iPhone, Android
Foursquare Full Review | Best Social Networking Apps | Best Apps

Saturday Afternoon: iTheatre
Your guide to the Saturday matinees. Browse the West End for a dose of Saturday culture (or a musical), get show times, read reviews and book tickets straight off your phone.
Platform: iPhone
Best Travel Apps | Best Apps

Saturday Afternoon: Sit or Squat
Horribly-named it may be, but this Charmin-sponsored loo-locator is on hand when the situation gets critical, with a Google Map directing you discreetly to the nearest port of relief. Loos displayed on the map are highlighted in either green (open), red (closed) or orange (unknown).
Platform: iPhone
Best Tools Apps | Best Apps

Saturday Evening: Cashfinder
Pub you're in won't take cards? Bring up Cashfinder to list nearby holes in the wall, complete with any charges and directions courtesy of Google Maps. Use it once to save on a £2 service charge and the app will have paid for itself.
Platform: iPhone
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Saturday Evening: Guestlist Clubbing
If you're not on the list, you're not coming in. Avoid the hoi polloi and swagger past brutish doormen into the very swankiest of London nightspots with this guestlist application covering around a dozen clubs.
Platform: iPhone, Android
Best Entertainment Apps | Best Apps

Saturday Evening: Rocket Taxi
No-one likes running the nightbus gauntlet at four in the morning. Fire up this app instead and have a local cab track you down via GPS, get a price estimate and then ferry you home. You can even rate the service using a stars system.
Platform: iPhone
Best Travel Apps | Best Apps

Saturday Evening: Shazam
The number one name-that-tune app. Hitting 'tag' while a tune is playing will connect you to Shazam's encyclopaedic database and provide you with the name, artist and album in seconds. It even claims to work if you sing a tune to it, although we've had less success with that, which may say more about our singing voices than the app.
Platform: iPhone, Android
Shazam Full Review | Best Entertainment Apps | Best Apps

Saturday Evening: Time Out London
In association with Smirnoff, search everything from restaurants to bars to gigs to exhibitions, all plotted on Google maps around your GPS-determined location. Includes hot picks and a whole lot of adverts for Smirnoff, in case nothing else appeals at two o'clock in the afternoon.
Platform: iPhone
Best Entertainment Apps | Best Apps