The Apple iCloud website went live for developers last night (August 1). With the website came more details regarding the product.

iCloud keeps data in sync between any Apple device or PC a person may own. iCloud also remembers device settings, applications, home screen layouts, ring tones and text messages, which means that all of that information is available if an iPhone or iPad is upgraded or replaced. iCloud is basically a backup function through the internet.

According to PC World: Apple’s iWork productivity software — Pages, Numbers and Keynote — can sync documents through iCloud. Contacts, Calendar and Mail will also be updated automatically across multiple devices. A new service called Photo Stream allows you to download your 1,000 most recent photos to a computer or other iOS device for 30 days. You can also store a device’s entire camera roll in iCloud for longer.

Third-party applications will also be able to use iCloud. Rovio, for example, could make Angry Birds data available across devices so that an individual’s iPhone and iPad will show the same progress through the game.

Apple’s iCloud will support up to 10 devices for free, and owners will receive 5GB of free storage for music, documents and photos.

Upgrades for Apple’s iCloud will be available. An additional 10GB will cost $20 per year, while 20GB will cost $40, and 50GB will cost $100.

Prices in the U.K. and Europe will be somewhat similar, 9to5Mac said. The 10GB option is £14 per year (about $22), while 20GB is £28 (about $33) and 50GB is £70 ($114) per year. The same plans in Europe will be €16, €32, and €80 per year, respectively.

A matching service for non-iTunes music will cost $24.99 per year.

iCloud will be released this Fall, alongside iOS 5.