The must-have apps on my phone are Instagram, Spotify and booking.
When I have free time I usually like watching what people post on Instagram because I love discovering some new and beautiful places to visit with my boyfriend or with my friends. Spotify is a must-have app because I listen to music everywhere, when I'm driving for example.
Booking is so important for the trip that I organize instead. I usually research the best option for me about price and location.