TronVault is an innovative secure and offline way to store TRON addresses and sign TRON contracts on mobile phones. With TronVault you never share your secret keys with third-party services. TronVault is designed to be among the most secure apps to sign TronVault contracts. TronVault can already sign transactions submitted to it from other apps or through the copy/paste buffer. TronVault is also a standalone app and any application that wishes to use it, including websites can use it to sign their transactions.