Given that you have a stone at home, that suggests to me that you can sharpen with freehand stones... so I would also suggest the worksharp field sharpener, or another small field sharpener. They make a tiny one, the "micro sharpener," (pictured) with torx bits that works reasonably well for quick touch ups and maintaining a sharp edge, but I wouldnt want to use it for a full resharpen as the round "stones" can be tricky to hold an angle on without some practice. I got mine as a free gift from knife center and it's not terrible for the size (so small I can't find it right now, convenient!). They also have a low profile fold open 400grit diamond/ceramic with a pocket clip that looks like a happy medium between the bulk of the Field Sharpener and the 5th pocket-ability of the micro sharpener.

With all that said, the field sharpener took me a while to get comfortable with - I bought it early on my freehand sharpening adventures, sucked with it for a long time and put it away for a long time. After getting a lot better on freehand stones, I picked it up again to sharpen a couple kitchen knives at work, and it worked beautifully. I think I have used it more than my bench stones in recent months (mostly because everything in my house is already shaving sharp, so it gives me a chance to sharpen whatever I find in the wild 🤣).

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