Typically I use pen and paper, but I've been interested in a tablet or similar device for a while and am interested in what other people are using.
The reMarkable 2 seems like a really cool option to play with, but also pretty pricey for trying it out to see if it would even work well.
While it's not directly related, when playing in games, I usually use a paper character sheet for reference, a notepad for consumables, story notes, and HP, and Pathbuilder on my phone for spells.
The Pathfinder Society will automatically take care of this for you during your downtime. You can see the rules on it in the Organized Play Guide.
Note that repairing damaged gear does not include resupplying consumables such as ammunition, potions, or talismans.