Keep writing
The Neo Smartpen R1 takes standard D1-type refills, and these are the ones we’d put in ours. Ordinary ballpoint ink, ordinary feel on paper — but matched to the pen so your handwriting still transcribes cleanly.
A pack of three, which for most people is a year of note-taking.
Changing a refill
Pull the old tip straight out and push the new one in the same direction. No tools, nothing to unscrew.
Why the refill matters
R1 reads a dot pattern on the paper while you write. A refill that’s too thick, too thin, or sits at the wrong depth changes how the pen meets the page, and recognition accuracy drops. Any D1 refill will write — but a verified one will transcribe better.
Verified refills
If you’d rather buy elsewhere, these eighteen are tested and confirmed:
| Zebra 4C (0.4 / 0.5 / 0.7 / 1.0) | Rotring 23SSOR07442 |
| Mitsubishi SE-7 | Caran d’Ache RNX316 |
| Kaweco Soul D1 1.0 | Kyocera D1 (75SD1) |
| Parker D1 (0.8 / 1.0) | Shachihata TK-RF |
| Pilot BRF-8EF / -8F / -8M | Visconti Mignon |
| Staedtler 92RE | Yard-O-Led |
| Sailorpen 18-0103-1 / -2 | Pentel |
| Schmidt | UNI Jetstream (Red) |
| Ohto | Platinum |
Refills outside this list may lower handwriting recognition accuracy.
Compatible with
Neo Smartpen R1 and other Neo Smartpen models using D1 refills.
