This is not accounting software. It is a record of what you spent, in enough detail to answer the questions you actually ask: where did the money go, am I over on this category, and who owes whom.
Recording
An expense has an amount, a currency, a category, a date, and optionally a note and a receipt image. Categories are yours to define; the defaults are a starting point rather than a schema.
Budgets are set per category per month. The trends view shows the same categories over time, which is where a slow drift becomes visible.
More than one currency
Every amount stores the currency it was actually in. A trip does not have to be converted at entry and then remembered wrongly.
Summaries convert using exchange rates that refresh four times a day. The original amount is never overwritten. Conversion happens at the point of reading, so a report you run next year uses the rate you ask for rather than the rate on the day you typed it in.
Splitting
Split an expense between people, evenly or by explicit shares. The system keeps the running balance so neither of you has to.
When it is time to settle up, the settlement suggestion works out the smallest set of payments that clears everyone. In a household of four this is consistently fewer transfers than the obvious approach of everyone paying everyone.
Marking a settlement clears the balance. Splitting requires the other person to be someone you share a workspace or a connection with.
In a family workspace
Family workspaces add shared budgets across the household and a family expense report, so "are we over on groceries" is a question about the household rather than about whichever adult happened to pay.