Expenddy vs a shared spreadsheet
The spreadsheet is the default tool for shared expenses, and for good reason — it is free, flexible and already open. It fails in specific, predictable ways, and it is worth knowing which.
Where a spreadsheet is genuinely better
Worth saying first, because it is true and it should decide some of these cases for you:
- Custom rules. If your group splits costs by a formula nobody else uses — weighted by nights stayed, or by a sliding scale — a spreadsheet does it and an app with three fixed split methods does not.
- One-off analysis.Answering “what did this cost per person per day, excluding flights?” is a spreadsheet's natural work.
- Costs nobody else needs to see. A budget you are planning alone does not need shared infrastructure.
- Somebody insists on owning the format. A treasurer who wants the file, the columns and the totals in their own shape should have them.
The four ways shared spreadsheets break
1. One person maintains it
In practice a shared expense spreadsheet has one real editor. Everyone else sends amounts by message, and the maintainer types them in. That person becomes a bottleneck, and every expense waits on them. When they get busy, the record stops.
2. Formulas break silently
A fifth person joins and the division stays over four. A row is inserted outside a SUM range. Someone types £120 into a cell that expected 120. None of these announce themselves — the sheet still shows a number, and it is wrong. This is the failure that matters most, because a confidently wrong balance is worse than no balance at all.
3. There is no audit trail
When a figure is disputed weeks later, a spreadsheet cannot say who entered it, when, or what it replaced. Version history exists in some tools, but nobody reads a diff of a spreadsheet to settle an argument about £30.
4. Nobody fills it in at the till
The moment an expense is worth recording is the moment it is paid — standing at a counter, on a phone. That is the worst possible context for a spreadsheet, so the entry gets deferred, and deferred entries become forgotten entries.
Side by side
| Shared spreadsheet | Expenddy | |
|---|---|---|
| Cost | Free | Free |
| Who can add an expense | Anyone with edit access, in practice usually one person | Every member, from their own device |
| Split methods | Anything you can write a formula for | Equal, exact amounts, percentage |
| Balances | Correct if the formulas are correct | Calculated automatically from the expenses |
| Who-owes-whom | Needs building by hand | Shown per person, updated on every change |
| Recording at the moment of payment | Awkward on a phone | Designed for it |
| Audit trail | Version history at best | Activity feed and settlement history, with voided settlements annotated rather than deleted |
| Receipt photos | Links to files, if someone maintains them | Attached to the expense (mobile app) |
| Works offline | Yes, with a local file | No — needs a connection |
| Custom calculations | Unlimited | Three split methods only |
| Export | It is already a file | CSV export of any ledger |
| Currency handling | Whatever you build, including conversion | Per-currency balances, no automatic conversion |
What Expenddy does not do that a spreadsheet does
Three genuine gaps, stated plainly:
- No custom formulas. If your split rule is not equal, exact or percentage, Expenddy cannot express it.
- No offline use. A spreadsheet on your laptop works on a plane; Expenddy needs a connection.
- No arbitrary reporting. Expenddy shows spending by category and by period; a spreadsheet answers any question you can write.
If those matter to you, use a spreadsheet — or use both, and export from Expenddy to CSV when you want to do something bespoke with the data.
Choosing between them
| Situation | Better choice | Why |
|---|---|---|
| Four flatmates, ongoing bills | Expenddy | Multiple people entering costs over months, and nobody wants to be the maintainer. |
| A trip where everyone pays for things constantly | Expenddy | Entries happen on phones, in the moment, or they do not happen. |
| A wedding budget with bespoke categories and projections | Spreadsheet | Planning and modelling, not splitting. |
| A club treasurer keeping formal accounts | Spreadsheet, or both | Custom reporting requirements. Export from Expenddy if members are recording expenses themselves. |
| Two people splitting rent 60/40 | Expenddy | A percentage split set once, applied to every future payment. |
Try it alongside your spreadsheet
Run both for a month. Whichever one people actually update is the one to keep.
Free to use. Available for Android and in any web browser. An iOS app is in development and is not released yet.