Apple's next wave of iOS products could launch later than expected following reports that the company's spring press conference will take place around March 21, Digital Spy reveals.

Both BuzzFeed and Recode are reporting that the iPad Air 3 and iPhone 5SE will be announced on, or shortly after, that date.

The new iOS devices were previously tipped for March 15, but the fact that two sources are claiming there's been a date change could be telling.

The iPhone 5SE is expected to mark a return to 4-inch handsets for Apple, shipping with a similar design to the plastic-coated iPhone 5C and specs in line with current flagship the iPhone 6S.

Meanwhile, the iPad Air 3 is rumored to be a smaller model of the iPad Pro, with the same four-way speaker configuration and Pencil stylus support.

If the earlier reports are to be believed, the devices will break cover alongside new bands for the Apple Watch next month.