Top ten iPhone apps

1. Mobile Flickr - £1.79

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Flickr dominates the online photo-sharing market and the iPhone app brings users more of the same. As well as viewing your own and your friends' pictures online, photos taken with the iPhone's 2 megapixel camera can be uploaded immediately to the Flickr website for online viewing. The applications page makes no mention of it, but as an aside pictures taken with the new iPhone can also be geotagged so that you can sync your photo library with a map and work out where each of the shots were taken.

2. Twitterific Premium - £5.99

The new favourite way to keep in touch with friends, family and compelling strangers online, Twitter helped bring 'microblogging' to the masses. The iPhone app makes the practice mobile, and with the premium version you get an extra theme and don't have to endure any ads.

3. Facebook - Free

Social networking is perhaps the field which has the most to gain from more advanced mobile technologies, and the free Facebook app is a logical evolution of the ubiquitous website. With instant messaging now built in, its easier than ever to keep an eye on what your friends and family are up to.

4. Starmap - £6.99

We are all in the gutter, as Oscar Wilde said, but some of us are looking at the stars. Some of us, he neglected to add, are looking at the stars on our new iPhone, using Starmap, which syncs its inbuilt planetarium with your location using GPS, and enables you to identify 120,00 visible stars and 150 galaxies and nebulae, and adjust sky brightness to match your observation conditions.

5. Sketches - £4.99

For a fiver, you can scribble down your thoughts and doodles using your finger or a stylus, and draw on or annotate photos. You can save them to your iPhone's virtual noticeboard, or send them on to your friends for them to mock you for.

6. iCalorie - £2.99

No longer is paranoid diet-tracking confined to the home or workplace; with Drexel Labs' iCalorie you can keep track of every last cream-cake and custard tart while on the move, and keep a daily log of your consumption. You can also measure how many calories you've burnt while exercising, and future versions promise the ability to upload your results on to a reporting website so you can process the information online.

7. Shazam - free for a trial period

Shazam enables you to use your iPhone identify songs on the go. All you've got to do is hold your phone up to the music and seconds later you'll receive the artist and track name. What's more, if you like the song you can watch related videos on YouTube, and buy the song in the iTunes store.

8. MooCowMusic:Band - £5.99

Not content with using the iPhone just to listen to music, Mark Terry developed an app which enables users to create their own tracks using instruments operated by the touchscreen interface. Incorporating drums, piano, bass guitar, blues guitar, and crowd noises, you can record multiple tracks, use a metronome to stay in time, overdub, and export your songs for later playback.

9. Super Monkey Ball - £5.99

Taking full advantage of the iPhone's built-in accelerometer and boosted processing power, Super Monkey Ball shot to the top of the UK iPhone app store when it opened yesterday. The name speaks for itself: your job is to roll a monkey in a ball around a variety of puzzles and mazes as fast as you can in an attempt to reach the goal as fast as possible.

10. Lonely Planet phrasebooks - £5.99 each, except Mandarin - free

The phrasebook seems to be just the latest everyday item to be absorbed into the iPhone, with these guides from the Lonely Planet providing an invaluable resource for the conscientious traveller. The company's new 10 most popular language guides have been converted for download, including French, Spanish, Italian, Thai and Czech.