Helio Smart Ring Health Tracker vs StrapsCo Pattern Comfort Stretch Band for Fitbit Charge 6: which is safer?

Where these two actually differ

• We flag Polymer band composition and residual monomers and Bacterial growth in sealed band-case junction on the Amazfit and not on the Fitbit.
• We flag Formaldehyde resins (dyes and finishes), Azo dyes (synthetic colorants), Antimony in polyester base fibers and Microplastic shedding during wear and wash on the Fitbit and not on the Amazfit.
• The Amazfit is Titanium alloy case, polymer band where the Fitbit is Elastane/spandex blend stretch fabric, which is most of the difference in these two grades.
• These two are level, close enough that price and fit should decide it rather than our grade.
• We are less certain about the Amazfit grade, at 35% confidence against 72%, because it discloses less.