To be safe when the fork will happen the 1st of August, I strongly recommend you to use a hardware wallet, so you will "own" your private keys!!
Wallets that support the BIP148 up to todays date the 1st of July 2017 are:
Hardware Wallets
Ledger Wallet
Trezor
Software Wallets
Altana
Electrum
Mycelium
Samourai Wallet
Simple Bitcoin Wallet