For you Android users, an app named "TSP Connect" is available to login to your TSP account and query your balances, recent transaction and summaries of contributions.
It is 100% safe to use as your account number and password are sent only to TSP.gov. It uses the HTTPS protocol for secure connections over the network (same as your browser) to ensure reasonable protection and integrity of your data. Go here to view screen shots and to download:
TSP Connect has no official connection with the Thrift Savings Plan. It simply provides access to a limited amount of read-only data.
Any feedback or suggestions are welcome.