When you invite the other parent
Either of you can start. You send an email invite from the ledger; the other parent opens it, makes their own account, and sees the same entries you do.
An invite never enrolls anyone in text messages. Each parent turns on their own alerts, for their own number, or never does.
The free ledger stays fully usable for the second parent, whatever plan you choose.
Invite the other parent
Invite sent by email
Text alerts stay off until they choose them for themselves.
