Original design that provides a new way for fast and intuitive input of chemical formula with automated calculation of molecular weight by IUPAC data for elements.
Builtin online dictionary of compounds allows to lookup widespread compounds with they credentials: CAS, InChI, PubChem Id, names.

Main features:

+ input element in single touch
+ creating formula with indexes and charges
+ multileveled grouping, e.g. for K4[Fe(CN)]6
+ "dot-joined" syntax support: K2SO4·KHSO4·2.15KHSO5
+ formula for minerals support: (Mg,Fe2)5Si8O22(OH)2
+ calculation of molecular weight by IUPAC weights data
+ molecular weight calculation report
+ name, CAS #, PubChem ID, InChI credentials is accessible when online