Apple Pay – Apple Pay is a contactless payment system that lets users make in-store purchases using their iPhone. Announced at the iPhone 6 launch, Apple Pay will initially roll out only in the United States, but it will instantly become a major player in the alternative payment arena.
Google Wallet – Google launched its "Wallet" mobile payment in 2011. It can store all your credit cards and gift cards on your phone.
Visa payWave – Visa payWave for Mobile is another contactless payment system aiming to make transactions faster. It simply requires users to wave their device in front of a contactless terminal to complete their purchase.
Coin – While not a contactless system, Coin is a digital card that stores information for all the other cards in your wallet. All you need to do is use Coin's digital display to select which one you would like to pay with.
Apple Watch – In future, Apple Pay will work with Apple watches, which are scheduled to be available early next year.
Apple Watch – The Apple Watch was announced at the iPhone 6 launch. Specs, including memory, battery life and screen resolution, are yet to be revealed.
Apple iPhone 6 – The iPhone 6 is available in two sizes, including the 5.5 inch iPhone 6 Plus.