After the release of the beta version of iCloud on Monday, costs to upgrade to the new service has been announced.

Users of iOS 5 and Mac OS X Lion will be able to enjoy 5 GB of storage in iCloud for free, but those who want more storage in cloud will have to pay extra.

Users will get 15 GB of storage for $20 a year, while storages of 25 GB and 55 GB will cost $40 and $100 a year.

Apple’s iCloud will replace local storage iOS-based devices, such as the iPhones, iPads and iPod Touch. Apple’s innovative iCloud service will just allow iOS 5 and Mac OS X Lion users to sync their photos, calendars, apps, music and all that among multiple Apple devices.

It means, if an iCloud user is writing a document in Pages on his/her iPad, then that document will automatically become available for editing his/her iPhone or a PC. It means users get rid of the process of transferring files by e- mail or USB.

Apple is expected to roll out iCloud service to public sometime this fall, with the launch of iOS 5.