This isn't part of the evaluation, but it's a useful item to include for conversation starters. Whether these are useful conversation starters in a particular company is up to your judgement.
If you are interviewing for an Alcohol friendly company then the calculator might be a fun side project that shows you know Android development. Raytheon would probably love the ballistic energy calculator. If your interviewing with the quaker church then both items will probably have you rejected for culture fit.
