While Apple may be unveiling the iPhone 7 and the Apple Watch 2 at tomorrow's event, it's pertinent to get familiar with the two software (iOS 10 and WatchOS 3) set to power the next devices.

Apple lifted the curtain on iOS 10 and WatchOS 3 earlier in the year at WWDC, with the major new feature in iOS 10 as the update to Messages, and the opening up of iMessage to third-party developers.

Developers can also use Siri to control third-party software, meaning Apple's virtual assistant may soon be used in sending messages on Whatsapp, or to help place a call on Skype.

Siri has also gotten smarter, and will be able to anticipate what you might be typing, and/or help out when searching for a phone number buried in your address book.

Other areas in which improvements were recorded in the new OS, is Photo, iOS 10 uses facial recognition to automatically sort your photos into albums of people, places and events.

Apple Maps has now got alternate routes, an Uber functionality, including traffic info and points of interest, and giving Google a close match up in the navigation game.

And for WatchOS 3, it now provides quick access to battery life and settings for Airplane Mode, Do Not Disturb and more.

Albeit, it isn't just about software for mobile devices, as upgrades to tvOS for Apple TV and MacOS Sierra, the new version of its desktop platform are expected, Apple will be keeping more focus on the Watch and iPhone 7.