1Zpresso K-Ultra

What it does well

Switching methods is fast. The Way to Coffee describes a ring that runs from 0 to 10, with 10 clicks per number and 100 per rotation, and lists starting points by method: 7.0 for V60 and 9.0 to 10.0 for French press. Home Coffee Expert makes the same point from the other side, saying the K-Ultra's advantage over the J-Ultra is quicker movement between brew methods.

Consistency holds up. Home Coffee Expert calls the finest settings "very consistent. Which is where it matters most." The Way to Coffee credits the burr for balanced, clean cups across pour-over, AeroPress, French press and occasional espresso.

It is fast. The Way to Coffee reports about 25 seconds for an 18 g filter dose, and about 45 seconds for 30 g at espresso fineness. Home Coffee Expert reports roughly the same: 30 g in about 45 seconds at espresso fineness and about 25 seconds for pour-over. The Way to Coffee measured retention at about 0.1 g.

The build gets praise. Home Coffee Expert describes solid, well-machined parts and says the reviewer dropped it and it survived. The Way to Coffee notes a Red Dot design award and a hard-shell case.

Where it falls short

Fine control is limited. Each click moves the burr 0.02 mm, per The Way to Coffee, and Home Coffee Expert says that is too coarse a step to dial in a shot. Both reviewers say it can pull usable espresso, but The Way to Coffee wouldn't do it daily because grinding fine for espresso is "a workout."

Coarse settings get less even. Home Coffee Expert says things "started to get a little uneven at the very coarsest settings," and adds that this did not hurt its French press flavor. For that reason BrewMark rates its coarse grinding below the 1Zpresso J.

Small annoyances add up. The Way to Coffee reports that the magnetic catch cup can knock off, static can appear at fine settings depending on the bean, and lighter, denser roasts produced more fines. It also names the twist-and-push handle fold as the most likely long-term wear point, a worry Home Coffee Expert shares.

Who should buy it, and who shouldn't

Buy it if your week includes several brew methods and you are tired of counting clicks. Pour-over, AeroPress, French press and moka pot sit comfortably in its range.

Skip it if espresso is your main brew. Both reviewers send espresso-first buyers to the J-Ultra. Home Coffee Expert also notes the J-Ultra is the cheaper of the two. Skip it, too, for ultra-clear light-roast filter: The Way to Coffee says the ZP6 is the better fit there.

How it compares

The 1Zpresso J-Ultra shares the K-Ultra's handle, catch cup, dial and burr size, but moves 8 microns per click, per The Way to Coffee. Home Coffee Expert also lists titanium-coated burrs on the J-Ultra against stainless steel on the K-Ultra. It is the better espresso choice and the slower grinder to retune between methods.

The 1Zpresso X-Ultra and K-Plus are the other siblings to price against it. Check convert grind settings between grinders if you move from one to another.

Owning it

1Zpresso gives a one-year limited warranty on materials and workmanship, with damage from misuse and wear excluded. Home Coffee Expert expects about a decade of normal use from the burrs. The Way to Coffee says disassembly for cleaning is straightforward, and our hand grinder cleaning guide covers the routine. The store page shows the K-Ultra for sale.