Both, as long as the free ones have a good spam protection.
Paid or free? Nostr.mom is probably the safer one from nostr:nprofile1qqsflmrj64um42nh9tu7w8nr3dffy9tjrt8xururype9ajle7alctvgpzpmhxue69uhk2tnwdaejumr0dshszrnhwden5te0dehhxtnvdakz7qgswaehxw309ahx7um5wghx6mmd9ugdacnq
Both, as long as the free ones have a good spam protection.
Then nostr.wine is a a great paid option.