Try Denomi

Every price on these pages is in a foreign currency. With Denomi turned on, each one shows your currency automatically, with the original beside it.

Before you start: open the Denomi app and turn on the extension in Settings > Apps > Safari > Extensions > Denomi, with All Websites set to Allow. If your chosen currency is the euro, pick another one, such as US Dollar, so the prices below have something to convert to.

Quick check

Espresso in Lisbon	1,20 €
Museum ticket in Paris	€17
Paperback in London	£9.99
Train ticket in Berlin	49,00 EUR

Each one should now show the amount in your currency first, followed by the original in smaller grey text. The exact amounts depend on today's rates.

Sample pages

Beach bar cocktail menuSaint-Barthélemy · euros Pastry café menuLisbon · euros Inn booking pageKyoto · yen Stationery shopLondon · pounds, with a sale price

Things to try

Open Denomi from Safari's page menu in the address bar to turn conversion off for a page, then back on.
In the Denomi app, change your currency, then come back to an open page. It updates without reloading.
In the app, choose to show only converted prices, then tap a price to reveal the original.

Numbers that aren't prices, like times, addresses, and room counts, are left alone on purpose.