nostr:nprofile1qqsxhugzf33nvzfmvvkm9k3pkedyf37c9qcy2na56atrfw3grctpeyqpzamhxue69uhhyetvv9ujumn0wd68ytnzv9hxgtcpz4mhxue69uhhyetvv9ujuerpd46hxtnfduhszrnhwden5te0dehhxtnvdakz7cl24cn works without either - you can export an offline zip, could quite feasibly reach your counterparty by carrier pigeon
Nostr is crazy flexible