The free, no-login calculator you keep open all trip: - Currency + math in one: type "12,800×2", see it live in your home currency - Every "=" auto-saves to your history with place & time — no manual expense entry - "Cheap or expensive here?" See how a price compares to real local prices, as a number - Trip budget tracks itself by category - Offline · no login · 10 languages · installs as an app - Your photos never leave your device Free, no account needed.