The base version of Alph can be purchased for $19.99 (or currency equivalent)
in the Apple App Store. It contains all the features listed below and has
VMG's Advanced Peng-Robinson for Natural Gas
property package and a selection of basic compounds used in natural gas processing:
C1-C10, iC4, iC5, H2O, CO2, H2S and N2
Additional compounds and property package options can be added by means of purchases made right
in the program in the Alph Store.
Most of these options are quite inexpensive, but the Alph Professional option, which includes
over 5600 compounds and the NRTL property package,
is $499.99. This may seem expensive for an IOS device, but it is a fraction of the price of
anything remotely comparable on a PC.
There is also a separate free version called Alph Jr available in the
Apple App Store. This has all the features of Alph, but is limited to just 10
compounds, C1-C10, and does not have the in application store for purchasing additional
options. This is intended both as a free introduction to Alph's features and for instructional
and learning purposes.