Mondex aimed to replace coins with a chip-based card and keyring reader for checking bank balances but it did not catch on. Yet fast-forward 20 years and contactless payments are increasingly replacing cash, with ‘mobile wallet’ services such as Apple Pay, Android Pay and Samsung Pay all launching this year to a ready-made audience of millions of smartphone users. Apple will be first to market this month. Barclaycard, meanwhile, has just launched three wearable contactless payment devices through its bPay brand.