Larkling is a free co-parenting app that helps separated and divorced parents stay organised. It includes a shared custody calendar, non-editable messaging (messages cannot be edited or deleted, creating a reliable record), expense tracking, a document vault for parenting plans and court orders, and a private journal.

Solo Mode works when the other parent won't participate — ideal for single parents and high-conflict situations. One parent can track everything independently.

The AI Tone Coach scans messages before sending and suggests calmer, more constructive wording — helpful for keeping communication child-focused.

Built in the UK for UK families. No download required — works in any browser on any device.