JPMorgan Chase joined American Express, USAA, Simple and Discover in offering TouchID on its iOS app Saturday. The video below explains the enrollment process. TouchID is no longer new, debuting in September 2013 with the iPhone 5S, but when the largest bank in the country adopts it for consumers, it can be taken as a signal that more will follow. For now the service apparently only works on iPhones, not iPads.

JPMorgan Chase [ticker: JPM] has a market capitalization of $243.8 billion.