Spreadsheet or expense app? When each one is the right answer

A spreadsheet isn't the choice of people who haven't heard apps exist, and an app isn't the choice of people who can't use a spreadsheet. They're tools with different strengths, and there are cases where the spreadsheet clearly wins.

It's worth knowing which before migrating in either direction.

Where the spreadsheet wins

When the question is unusual. Every app shows what it decided to show. If you want to cross two categories, see what you spent at one merchant over two years, or model three rent scenarios, the spreadsheet does it and the app doesn't. Particular questions are infinite and no app covers them all.

When it's a calculation, not a record. Simulating an instalment purchase against paying outright, projecting how long your emergency fund will take, computing your essential month under different assumptions. That's a spreadsheet, always.

When it's a one-off project with an end date. A renovation, a wedding, a trip that's over and needs closing. A project with twenty rows and three people doesn't need an app.

When you already have one that's worked for years. If you keep it current, don't change it. The best tool is the one you use.

Where the app wins

At logging in the moment. It's the decisive difference and it isn't close. Opening a spreadsheet on your phone, waiting for it to load, finding the row, typing across four columns — against three taps or dictating a sentence. And since tracking gets abandoned through friction rather than lack of will, this decides almost everything.

At recurring expenses. In a spreadsheet, rent gets typed twelve times a year. In an app it's entered once. It's in recurring expenses.

At more than one currency. A spreadsheet can convert, but the rate for the day of the expense has to be looked up and pasted by hand, expense by expense. And if you use a formula that pulls today's rate, every closed month recalculates itself and the history stops being comparable — the problem is explained in tracking two currencies.

At shared expenses. This is where the spreadsheet breaks completely: everyone has to edit the same file, nobody can overwrite a row, and someone has to recalculate the balances. In practice one person ends up doing all the logging, which is the problem covered in splitting with roommates.

At not breaking. A formula copied wrong, a row inserted in the wrong place, a range that wasn't extended. Spreadsheet errors are silent: the number still appears, it's just wrong.

The point almost nobody makes: it isn't one or the other

The setup that works best in practice combines both, and neither replaces the other:

• The app records, because that's the daily act and where friction rules.
• The spreadsheet calculates, when a question comes up that the app doesn't answer.

The bridge is export: you pull a CSV, do the calculation you need, and carry on logging in the app. It's in exporting your expenses.

Which is why export is a more important feature than it looks: it's what means you don't have to choose.

If you're coming from a spreadsheet and want to migrate

Three things, in this order:

1. Don't import three years. Start with the current month. Keep looking at the old history in the spreadsheet, where it already is.
2. Enter the recurring expenses first. It's half an hour and it handles half your month permanently.
3. Leave the spreadsheet as it is for two months. If the app doesn't convince you, you've lost nothing.

The rest of the method is in starting fresh mid-year.

In one line

The spreadsheet wins for calculating, simulating and projects with an end date; the app wins for daily logging, recurring expenses, currencies and shared costs. What actually works is using both, and export is what makes that possible.

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Shared expenses with no cap, 150+ currencies, and the numbers explained.