Depending on what aspects of chiptunes you care about, the Polyend Tracker Mini (https://polyend.com/tracker-mini/ https://polyend.com/tracker-mini/) might be r

Depending on what aspects of chiptunes you care about, the Polyend Tracker Mini (https://polyend.com/tracker-mini/ https://polyend.com/tracker-mini/) might be right. It's less like a portable hardware version of Bintracker and more like a portable hardware version of Renoise. So it's a hardware tracker device, and you could load up some lofi square and saw wave looping samples and some looping noise samples and make music with the tracker that many would consider chiptunes, but you don't get the chip emulation that Bintracker has.