Since the launch of Apple's App Store, we've seen a veritable plethora of applications and games released, all vying for your pennies and your attention. In April of this year, only nine months after its launch, announced its one billionth App Store sale. Since then figures have doubled with the announcement from Apple at the end of September that two billion downloads had been achieved, a huge accomplishment and surely a sign that digital downloads could be the future. With 85,000 different apps available, over 21,000 of those being games at time of writing, just how are you expected to know what games are actually worth your time and money? Enter this round-up of some of the best games that money can buy on the App Store, starting with the games that are cheaper than a pint, all under 2.50 GBP each.

Bejewelled 2 (1.79 GBP)

There are many, many Match 3 games on the App Store, puzzle games that involve matching up items with each other to clear the board, but none are as addictive as Bejewelled 2. To call it the father of Match 3 games would be entirely appropriate as it really hasn't been bettered. You've no doubt played it before on the PC, possibly even on the or PS3, but this really is a great conversion to the iPhone. The touch based controls are perfect with Bejewelled 2 as a simple swipe across the screen moves the gems just where you want them. It might be a ridiculously simple concept, but it truly is addictive and for the bargain price of 1.79 GBP, it will certainly keep you hooked while sitting idly on your daily commute.

Flight Control (0.59 GBP)

It's a game that's even caught the hearts of various celebrities such as Stephen Fry and the ever-secretly cool Philip Schofield, and there are good reasons for it. Like so many of the greats, Flight Control is incredibly simple. You play an air traffic controller: your job is to direct jets, small planes and helicopters to the relevant runways and helipads, while ensuring that none of them collide. It starts out nice and slow, but the pace picks up fast and becomes challenging, frustrating but ultimately brilliant fun. Much of its success has to be put down to the perfect pricing, at 59 pence it is cheaper than pretty much any other form of entertainment you could think of. No self respecting iPhone/iPod Touch owner can be without this gem.

Paper Toss (free)

Some games sound distinctly pointless when described despite being compelling fun in action, and Paper Toss is one such game. The purpose behind it? You are sitting in an office and have to flick a piece of paper into a bin. Yes it is as simple as that. Luckily, to make things a little more interesting, there is a fan in the office which means wind direction and speed has to be taken into account. To keep things competitive you are scored on how many times you manage to toss the paper into the bin without missing and there is an leaderboard. It might sound a little pointless but it really is strangely compelling, and for free, it is well worth a look.

Pocket God (0.59 GBP)

From tossing paper to playing God, yes the App Store can really be that versatile. Pocket God involves taking the role of a God who rules over some primitive islanders. It enables you to use the accelerometer to simulate earthquakes and affect the gravity of the island. One of the best things about Pocket God is the regular stream of updates which just keep adding more and more features to the game. Past updates have provided such features as the ability to fire lightning bolts at the islanders and extra mini games which are homages to games such as Flight Control and Doodle Jump. With the 28th update on its way, Pocket God is astonishingly well supported especially for such an inexpensive title. Miss it at your peril.