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Apple Cider is based on an older US Patent that says Isopropyl Alchol is used for improved cleaning.
Here is an excerpt from another US Patent I found.
It uses Butyl Alcohol!
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The tertiary alcohol is included to enhance cleaning performance of the hypochlorite composition. The tertiary alcohol is included in an amount from about 0.1 to about 3% by weight of the composition, preferably from about 0.50 to about 2.0%, most preferably from about 0.75 to 1.50%.

Suitable alcohols are those having eight or fewer carbon atoms in the alcohol molecule. Specific examples of the tertiary alcohol include 2-methyl-2-propanol (tert-butyl alcohol); 2-methyl-2-butanol (tert-amyl alcohol); 3-methyl-3-pentanol; 3-ethyl-3-pentanol; 2-methyl-2-hexanol, and 2-methyl-2-pentanol. Although 3-ethyl-3-pentanol provides directionally better performance than the aforementioned alcohols, tert-amyl and tert-butyl alcohols are preferred because of cost.