Hailo works on iPhone and Android smartphones. Specifically, any Android phone that runs on version 2.2 or higher and iPhone models 4 or later. For iPhone make sure you are running iOS 4.3 or above. Hailo works best on the most up-to-date phone software, so please check you have the most recent versions installed for the best Hailo experience. And did you know that if you got yourself a new phone specifically for work you might be able to claim the tax back. Have a chat with your accountant and see how much you can save.