A cryptocurrency wallet is a device, physical medium, program or a service which stores the public and/or private keys for cryptocurrency transactions. In addition to this basic function of storing the keys, a cryptocurrency wallet more often also offers the functionality of encrypting and/or signing information. (courtesy: wikipedia)
The app will generate a wallet for you automatically, based on the seed phrase.
The seed phrase is your 24 word mnemonic, provided to you the first time you go through the PhunWallet registration process. This seed phrase is the ONLY WAY to recover an existing wallet and the contained tokens. Phunware CANNOT recover wallets.
You CANNOT recover your wallet without your seed phrase. Make sure you write down the exact words displayed during registration and store them somewhere safe.
Ethereum provides you a public key/private key pair generated by your seed phrase. The public key of the Ethereum wallet is generally referred to as a shareable ethereum address.