Bitpie

A mobile wallet used heavily on TRON. The keys are the user’s, except where the app keeps a fee wallet.

Bitpie is a mobile wallet, not an exchange book. People in the TRON world used it to hold TRX and USDT and to pay other Bitpie users inside the app. A customer’s wallet is that customer’s key. It is not published, and it is not a company treasury.