The options, honestly
Five kinds of tool, and their real trade-offs
"App" is a broad word. Before you download anything, it helps to know which category of tool you're really choosing between, because they fail in very different ways.
📝
Notes app
Free and already on your phone. Great for a jotted list on a short solo trip. But you'll do every currency conversion by hand, there's no budget to push against, and the totals never add themselves up. Fine as a stopgap, painful for a real trip.
📊
Spreadsheet
Endlessly flexible, and genuinely capable if you enjoy building one. The catch is that you have to build and maintain it, entering rows on a phone keyboard is slow, and live exchange rates and receipt capture are hard to bolt on. Best for planners who love a template.
🏦
Bank or card app
Accurate to the cent and no manual entry needed, since the transaction just appears. But it only sees spending on that one card, it can lag a day or two, cash is invisible to it, and it won't split a bill or hold a trip budget. A useful cross-check, not a trip tracker.
💼
General expense app
Built for business receipts and reimbursement. Solid at logging and exporting, but the workflow is aimed at a finance department, not a holiday. You often get no per-trip budget, no way to split with friends, and a subscription priced for companies.
✈️
Dedicated travel app
Built for exactly this: a trip budget, fast multi-currency entry, receipt scanning, splitting and a map of where your money went. The trade-off is one more app to install, which is worth it if you travel regularly and overkill for a single afternoon out.
🧭
Which fits you?
Occasional, solo, one currency? A notes app is fine. Frequent trips, cash and cards, several currencies, sometimes with friends? That's the point where a dedicated app stops being a luxury and starts saving you real money and a few arguments.