Seed Phrase Generator App. While it uses BIP32 method you'll be able to continue to import BIP39 seeds into Electrum wallet. Also aside from BIp32 There's BIP44 Variation which some wallet use for the technology of seeds. Passphrase values are stored in the /.tmp.tmp file within the MicroSD card. The https://allkindsofsocial.com/story4081030/how-are-seed-phrases-generated-bip39-mnemonic-code-converter-options