Bip39 flutter https://franciscougju442.bravesites.com/entries/general/Produce-Bitcoin-Addresses-from-Seed-Every-Little-Thing-You-Required-to-Know While it employs BIP32 system you could nevertheless import BIP39 seeds into Electrum wallet. Also in addition to BIp32 there is BIP44 Edition which some wallet use for that technology of seeds. Vault12 may be the pioneer in copyright inheri... https://throbsocial.com/story22028990/bip39-phrase-generator-5-tips-about-bip39-standard-you-can-use-today-https-cutt-ly-uryc5rw7