Apple App store offering TSP App not sanctioned by TSP Published March 11, 2013 By Thrift Savings Plan www.tsp.gov EDWARDS AIR FORCE BASE, Calif. -- A free iPhone App, TSP Funds, currently being offered through the Apple App Store asks Thrift Savings Plan participants for their account login information. This app is not being offered through the TSP and the TSP does not recommend using this application to access your TSP account. Providing this information could result in a security risk to your account. For more information visit www.tsp.gov.