We can use product names, just not retailer names. I use Rootone powder for when I repot or divide. I use KLN rooting liquid for plants after transplanting if they don't show roots in a couple weeks. I have not tried the gels yet. I think the main point for me is that the powder (and therefore probably the gels) stick to the plant and continue to encourage root growth while protecting the area from rot/fungus. The liquid I use as a booster when I don't want to unpot the plant to apply powder/gel.
I am sure different people use different products, it's a matter of personal preference.