Any apps or websites that have helped you while travelling in Europe?

For example apps like Google Translate + Maps for obvious reasons. Even ones that saved you money on transport, accommodation, flights, planning journeys, finding things to do or meeting new people.

Apps like Uber in most countries.

Getir for groceries, Tier (London) for e-scooters.

Recommend any global apps or country specific apps that have made your trip easier or saved you money on your trips in Europe.