I know you were originally talking about the Sanderson, but just Incase you're interested - Pianoscope and Piano Meter are two great apps which have really affordable subscription options, and they both have the most of the familiar historical tuning temperaments built right in, as well as pure twelves. You could basically use them for one month at a time and then only subscribe when you need it.
Cyber and tunelab are amazing also, and both have historical tunings, but do not have a subscription model.
I've been super impressed with the pianoscope app. Some great info about the pianoscope features here:
All the best!
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Matthew W.
A.M.O. Pianos
Lebanon, TN 37087
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