Two tools
Both of these are small on purpose. Neither will tell you a dose, a dilution, a temperature or a soak time, and neither composes a mixture. The rules each one uses are printed on its own page, and every answer says which rule produced it.
Two classes, one answer
Pick a product class on each side. The answer is one of three states: never together, check both labels, or no known conflict published. The last of those is an absence of evidence and never a permission.
Input: nine product classes on each side, with the class already chosen on one side turned off on the other.
What the box actually counts
Pick a category and then a listing. You get the share of that category stating a load count at all, and the figure the chosen listing states. Where a listing says nothing, you are told so, and nothing is substituted.
Input: two categories, then the listings inside the one you chose.