Invite-only, and self-hosted
Who paid, who owes, and what we're doing on Thursday.
GreenMagpie splits the money with the people you actually live and travel with — then keeps the whole trip in one place, planned day by day, with everyone's opinion on the record.
No ads, no tracking, no selling anything. It runs on a NAS in a shed.
The money
Split anything. Settle up once.
Every screen below is the real app, running — a made-up family and a made-up trip, but not a mockup.
Split it however it actually happened
Equally, by exact amounts, by percentage, by shares, or line by line off the receipt. More than one person can have paid. Someone can cover a bill they weren't part of.
- Shares always sum to the total, to the cent — the remainder is distributed, never dropped
- Claim your own items off an itemised receipt, including three of the same beer
- Amounts are whole cents end to end, so nothing rounds away over a fortnight
Fewest payments, not most
Four people, a fortnight of receipts, and it comes down to two transfers. GreenMagpie works out who should pay whom so the group nets to zero in as few payments as possible — per currency, never mixing them.
- Balances that can't net to zero are refused, not quietly rounded — a plausible wrong number is worse than none
- Settle in part or in full, and it stays on the record
- Trust levels: expenses from someone new wait for your approval, expenses from family don't
A group for the house, a group for the trip
Housemates, family, a weekend away — each group keeps its own members, currency and history. Add people by email, or send a link into the group chat.
- Comments and reactions on any expense, so "what was this?" gets answered where it was asked
- Recurring expenses materialise themselves — rent doesn't need re-entering
- Archive a finished group; it refuses while anyone still owes anyone
Trips
A trip is a group that knows it's going somewhere
Turn trip mode on and the same group grows a budget, a map, and a sense of how the spending is tracking — without becoming a separate app you have to keep in sync.
Know if you're ahead or behind, while there's still time to change it
Set a budget and GreenMagpie tells you what you've spent, what's left, and whether today's pace gets you home solvent.
- Daily spend, spread properly — a five-night hotel counts as five days, not one spike
- Where the money went, by country and by category, on a real map
- Exchange rates locked at the moment you enter an expense, never silently re-rated later
- Cash withdrawals are transfers, not spending. Refunds net out. Income can top the budget up
- A wrap-up card at the end: biggest day, longest under-budget streak, the lot
The agenda
Plan it together, or plan it alone and hear about it later
This is the part families argue about. GreenMagpie gives the argument somewhere to happen — a day-by-day plan everyone can see, add to, and vote on, instead of four screenshots and a group chat nobody can scroll back through.
Every day of the trip, in order
Destinations carry real dates, so the timeline knows you're in Tokyo until the 18th and Kyoto after that. Days with nothing planned still show up — a free Thursday is information, and it's where the "+" lives.
- Drag anything to another day. A five-night hotel keeps its five nights
- Where you're staying sits at the top of every day it covers
- Tap a place to open it in your maps app
- Activities are a morning or an afternoon — no inventing "14:30" for a temple visit
- Ideas with no date yet sit at the top instead of getting lost
- Flights, trains, stays, meals, events, notes — with booking references and confirmation numbers
Everyone gets a say, and the app never decides for you
Yes, maybe, or no on anything — change your mind whenever you like. Talk it through in a thread attached to the thing itself, not buried in a chat. Then somebody locks it in, and that's a decision the group made rather than a tally the app acted on.
- Votes never auto-decide anything. Three yeses is information, not consent
- Withdrawing a vote isn't the same as voting no — "I don't mind" stays sayable
- Locked items refuse edits until someone unlocks them, and the unlock is on the record
- Comments notify everyone else; votes stay quiet, so nobody mutes the trip
- The kid who only cares about one arcade can put it on the plan themselves
Stuck on a blank week? Have it drafted.
Tell it the pace and what you're into, and GreenMagpie proposes a day-by-day itinerary built around where you'll actually be — then hands it to you as suggestions, not as a plan.
- Nothing is added until you tap Add — one item, a whole day, or all of it
- Accepted suggestions are marked as suggestions, so months later you still know which parts came from a machine
- It won't suggest the museum you already booked
- Suggestions it got wrong are dropped and counted, never quietly "fixed"
- It sends your dates, destinations, budget and group size. Not names, not expenses
And the rest
The unglamorous things that make it usable
Photograph the receipt
Scan it and the line items come back filled in. Suggestions only — nothing saves until you say so.
Works without signal
Enter expenses on a train with no bars. They queue and sync when you're back.
Install it like an app
Add to your home screen and it opens full-screen, no app store involved.
Push notifications
Know when someone adds an expense you're in, or comments on the plan.
English and 日本語
Fully translated, including the currencies that don't have cents.
Import and export
Bring a spreadsheet in, take a CSV out. Your data leaves whenever you want it to.
Photos and avatars
Put a face to a name, or keep the generated bird. Either works.
Small delights
Streaks, group titles and a few things worth finding. None of it near the money.
Getting in
It's invite-only for now
GreenMagpie runs on a private server and takes new people by invitation, so it stays quick and stays ours. If someone sent you here, they can send you a link — it signs you up and adds you as a friend in one tap.
Already signed up? Everything's at the app.