Jewelers often need to convert between units for price calculations and appraisals, but some of the weight/mass units are esoteric to the industry and are not present in many calculation tools.
Jewelers Unit Converter Lite meets that need by allowing quick conversions between the following units:
AVOIRDUPOIS (Imperial weight):
grain, dram, ounce, pound
METRIC:
microgram, milligram, gram, kilogram
TROY:
carat, pennyweight, ounce, pound
ANCIENT:
Roman drachma, Greek drachma, Israeli sheqel, Chinese tael
Jewelers Unit Converter Pro has all these features, plus it is ad-free and interfaces with the Apple Watch for a dual-screen experience.