Ask HN: What apps are 'must haves' on your phone?

I have Spotify to control my PS4 with, a voice recorder for my piano lessons and Codebox which is a list of algorithms I can review and learn. I'm not really a big app user though.

Transportation(Moovit + Google maps). Browser. Music player. Internet radio and podcasts,

iMessage. TOTP client. Mail. Safari + 1Blocker. Maps.