Disclaimer : I have limb deformities, but my deformities haven’t been an issue with any wrist based gadget in the past. Especially in the non-dominant hand, apart from it being stunted I haven’t faced restrictions to daily activities due to my disabilities. But I’m open to the idea that the the issues I faced with Fitbit could be related to my medical conditions but the symptoms have been synonymous with experiences of others reported in forums.