Expenddy vs splitting by hand
A calculator, a quick division and an instant transfer. For a single bill among people who will not share another cost this month, this is the right answer and no app improves it.
When splitting by hand is the right choice
- One bill, everyone present, everyone pays on the spot. Nothing is left outstanding, so there is nothing to track.
- Two people who settle instantly, every time.
- An amount small enough that precision does not matter and nobody will think about it again.
- A group that will genuinely never share another cost.
If that describes your situation, stop here — you do not need an app, and this page is not trying to convince you otherwise.
Where it stops working
Costs arrive at different times
One person books in March, another pays for petrol in May. There is no single moment at which everyone is present with a calculator, so the division never happens and the debt just sits there.
Not everyone can pay right now
“I'll get you later” is the point at which manual splitting converts into an unrecorded loan. Later is exactly when nobody remembers.
The exceptions accumulate
Two of five people skipped the museum. One does not drink. Someone arrived on the second day. Each exception is easy on its own; six of them across a week is beyond what anyone reconstructs accurately.
Rounding drifts
“Call it £20” is fine once. Twelve times across a trip, always rounded in the payer's favour or against it, and the accumulated drift is real money.
Nobody wants to raise it
The deepest problem is social rather than arithmetical. Asking for £15 back costs more socially than £15 is worth, so people write it off — and quietly keep score anyway.
What the drift looks like
A week of rounding, one person
Six shared costs across a week, each split by hand and rounded to a convenient number rather than the exact share.
| Cost | Exact share | Rounded to | Difference |
|---|---|---|---|
| Dinner | £23.75 | £25 | −£1.25 |
| Taxi | £8.33 | £10 | −£1.67 |
| Groceries | £17.40 | £20 | −£2.60 |
| Tickets | £31.50 | £30 | +£1.50 |
| Lunch | £12.25 | £12 | +£0.25 |
| Drinks | £19.60 | £20 | −£0.40 |
| Total | £112.83 | £117 | −£4.17 |
Result: Over one week this person paid £4.17 more than their share. Nothing was unfair on any single occasion, and nobody did anything wrong — but the rounding was not symmetrical, and small differences compound in whichever direction the habit leans.
Recorded exactly and settled once, the same week produces one transfer and no drift at all.
Side by side
| By hand | Expenddy | |
|---|---|---|
| Setup | None | Create a group once |
| Effort per expense | Calculate and transfer, every time | Record it — a few seconds |
| Number of transfers | One per person per bill | One per person at the end |
| Handles delayed payment | No — it becomes an unrecorded loan | Yes, it is a balance |
| Handles partial groups | Recalculated by hand each time | Choose who shares the expense |
| Rounding | Drifts | Exact to the penny; shares always total the bill |
| Record months later | None | Full ledger, exportable |
| Needs everyone present | Yes | No |
| Works with no internet | Yes | No |
The middle ground most groups land on
In practice the best system is usually both. Split by hand when everyone is present and can settle immediately — that genuinely is faster. Record it when anything is left outstanding.
The rule of thumb: if the words “I'll get you back” are said, it should be recorded. That sentence is the exact boundary between a split and a debt.
Record the ones that stay outstanding
Record a shared expense, see the balance update, and settle it when the money moves.
Free to use. Available for Android and in any web browser. An iOS app is in development and is not released yet.