Spend in any currency.
Budget in yours.
Enter YNAB transactions in their original foreign currency — yen in Tokyo, euros in Lisbon — and this app converts each one to your plan's currency using the official exchange rate of the transaction's date, updating the amount right in YNAB.
1. Point it at an account
Pick the YNAB account where you enter foreign-currency transactions, the currency they're in, and a start date.
2. Preview
See every unconverted transaction with its date-accurate ECB exchange rate and the exact amount it will become. Untick anything you want to leave alone.
3. Approve
One click updates the amounts in YNAB and notes the original amount and
rate in each memo, e.g. -1,817 JPY (FX rate: 0.0087987) —
so nothing is ever converted twice.
Your data stays yours
Nothing is written to YNAB without your explicit approval, and the app stores no transaction data at all — the preview you approve is exactly what gets applied. Exchange rates come from the European Central Bank via the free Frankfurter API.