A free iPhone app called TSP Funds is currently being offered through the Apple store. It asks Thrift Savings Plan (TSP) participants for their account log in information.
This is not an official TSP app and the TSP does not recommend using this app to access your TSP account. Providing your information could result in a security risk to your account.
If you would like to access your TSP account, please log in directly at TSP.gov.