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Family & co-parenting OS

MVP → product · iOS & Android · 2025 — present

DuetNest: one shared system for families and co-parents

DuetNest keeps two households on the same page — calendar, tasks, expenses, agreements and communication in one place, so coordination doesn't depend on screenshots and chat history.

The challenge

Co-parenting coordination is spread across chats, calendars, bank transfers and memory. When something is disputed, there is no shared record — only two versions of it.

The product had to work for people who don't want to talk much: neutral, low-friction, and useful even when only one side is engaged.

What we built

Shared timeline as the source of truth

Events, handovers and changes live on one timeline both sides see, so history is a fact rather than an argument.

Money without awkwardness

Expenses are logged, split and settled inside the product, so reimbursements stop being a personal negotiation.

Agreements in writing

Recurring arrangements are stored as structured agreements instead of being re-litigated every month.

Assistant where it helps

AI is used for the boring part — turning messy input into structured events and summaries — not as a gimmick.

Key capabilities

  • Shared calendar with handovers and recurring schedules
  • Tasks and checklists per child and per household
  • Expense tracking with splitting and settlement
  • Structured agreements and documents
  • Neutral in-app communication

Technology

  • React
  • TypeScript
  • Mobile apps (iOS & Android)
  • Postgres
  • AI assistant

Where it stands

  • A working family OS available on web, App Store and Google Play
  • Coordination, money and agreements consolidated into one record both sides trust
  • A schema that extends to new household types without redesign

Services behind this build

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