New offering ... The iphone6 was released with major fanfare and Apple is set to announce a second major update to its flagship device on Monday. Picture: Provided

Reports suggest a software update for the wearable device will be revealed at the very least, if not an Apple Watch 2, which would come a year after the device first launched.

The event in California takes place a day before Apple is due in court over its continued battle with the US Justice Department and the FBI over encryption.

Authorities are attempting to force the firm to help them bypass security features on the locked phone of a terrorism suspect from the San Bernardino shootings last year.

Smaller devices ... Apple released its 12.9-inch iPad Pro in November, along with a stylus called the Pencil and a Smart Keyboard. The company is rumored to have a smaller iPad Pro coming out soon. Picture: ProvidedSource:Supplied

Shrinking screens ... Some rumors point toward a move toward smaller phone options in addition to a shrunken iPad Pro. Picture: ProvidedSource:Supplied

Apple has so far refused on grounds of user privacy, and it is unclear whether the company plans to address the issue at the live event.

Software, on the other hand, is likely to be discussed at length, with an update to iOS 9, which powers the iPhone and iPad, set to be shown off.

The update should include a new nightshift mode, which reduces blue light on the screen for better night-time reading, as well as touch ID fingerprint scan login for protecting items in the notes app.

The anticipated iPhone SE is rumoured to be four inches in size — similar to the iPhone 5 that launched in 2012 — but it is expected to have the same 12 megapixel camera as the iPhone 6s, released last September, as well as a touch ID fingerprint scanner. Reports on the rumoured new iPad suggest it could be a smaller version of the iPad Pro.