The TravelMaster Download App can only currently be used on Android devices that have NFC Capability and a good indicator if your phone has this is if it has Google Pay or Samsung Pay.
For details of the phone models you will be able to use click here (External Website - we are not responsible for the contents)
Unfortunately the App is not available on Apple devices, Such as iPhones or iPads, as Apple have not opened up access to their Phone's NFC Functions.
Don't worry though. If you have an Apple device but know someone with an Android device you can use their phone to collect your purchased product.