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Split expenses

Who paid for what, how it’s split and who owes whom, for roommates, couples or a trip. Say what you paid, and your assistant keeps the balance.

Use cases All use cases

For builders

How to connect ChatGPT and Claude to the same data How to give an AI agent safe, scoped access to data A database for vibe-coded apps, with access built in

AI and engineering

Keep a daily work log Keep a prompt library for Claude, ChatGPT and Cursor Let agents build on each other’s findings Run a task queue for your agents Share agent traces across a team Share research notes Track eval results over time Start an experiment tracker Keep a model training log Keep feature flags and config agents can read Keep bug reproductions and test cases Record deploy and release history Keep an inventory of API keys and services Start a dataset registry Collect standup notes from assistants Keep an incident log Log benchmarks and latency measurements Track GPU and compute spend Start a labeling and annotation queue

Personal

Keep a side-project idea backlog Start a habit tracker Start a reading log Track what you’re learning Track subscriptions Start a budget tracker Start a movie and TV tracker Start a home inventory Keep a plant care log Keep a car maintenance log Plan your travel Keep a tasting journal Track a collection Keep notes on the people you know Track job applications Keep a vocabulary list Track important documents Keep a food log Start a training log Keep a log of your own numbers Keep a schedule of what is due and when to refill Start a recipe collection Keep a list of things to buy Share a pet care log Keep a daily journal Keep gift ideas and birthdays

Business

Track consulting time Track freelance clients and invoices Track fundraising Start a lightweight issue tracker Back an internal tool Store a customer-facing app’s data Plan a content calendar Collect customer feedback and feature requests Manage event attendees and sponsors Report from many sources Start a customer list Track sales deals Keep a customer support log Track hiring Start an employee directory and onboarding checklist Track inventory Track orders and suppliers Start an asset and equipment register Track partners and resellers Track contracts and renewal dates Keep a price list and build quotes

Collaborative

Split expenses Share a research reading list Plan an open-source project roadmap Build a shared world-building bible Plan a house renovation Start a shared household list Share a household chores rota Keep a family schedule Track kids’ activities Plan a trip with friends Plan a wedding or party Run a book club Run a sports team or club Run volunteer and community sign-ups Run a student group project Start a neighborhood tool-lending list Share a weekly meal plan Write babysitter and caregiver handover notes Plan a shift schedule Plan a carpool rota Share a packing list Coordinate help for a parent

An example

@ADoor I paid the electricity bill, 840, split three ways. And 45 for cleaning supplies, just between me and Sara.

ADoor Added 2 entries to Shared costs

Shared costs

DateWhatAmountPaid bySplit
Oct 20Electricity840ErikErik, Sara, Jonas
Oct 20Cleaning supplies45ErikErik, Sara

What you can ask later

  • “Who owes whom right now?”
  • “How much have we spent on electricity since the summer?”
  • “What did I pay for that hasn’t been settled?”
  • “Mark Sara’s transfer as settled.”
  • “Chart our shared bills by month this year.”

Who can see what

  • Everyone in the group adds what they paid and reads the balances, from their own assistant.
  • Nobody can edit someone else’s entries, if you set it up that way. Every change keeps who made it and the before and after.
  • Your personal budget stays in your own space, out of the shared one.

How it compares with Splitwise or Tricount

Splitwise and Tricount handle the payment side: simplified debts, currencies and settling up through a payment app.

ADoor fits when shared costs are part of a bigger picture, like house bills next to the chores rota. Anyone adds in a sentence, the history shows recent changes and who made them, and your assistant can answer any question about the balance.

How to start

  1. Sign in to ADoor, then add it to an assistant like ChatGPT, Claude, Grok or Cursor through MCP.
  2. Tell it: “Track our shared costs: date, what, amount, paid by, split between, and settled. Invite my roommates.”
  3. Let each person edit only the entries where Paid by is their name, one grant per person.

Get your account

Questions people ask

Can it handle uneven splits?

Yes. Say how it’s split and the entry records it.

What if someone edits an amount?

The history shows the change, who made it and the old value.

What does it cost?

Nothing on the free plan, which holds 3 tables and 100 rows. Pro is $10 a month per workspace, with 1 GB of storage and no per-GB charges.

Which assistants can I use?

Any of ChatGPT, Claude, Grok or Cursor, connected through MCP. Each one asks for your approval, and you decide which lists it can use.

Updated October 20, 2026.

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