I've tested a fair few of these AI visibility tools myself, so here's my honest take from the user side.
Simple to me means three things most of them still mess up.
First, prompt generation. A lot will auto-generate queries from a topic input, but that gives you shallow coverage. You need prompts structured by buyer journey stage - awareness, comparison, problem-aware - and by persona. If you're in B2B, missing that split means you're blind to where AI search actually decides for or against you.
Second, competitor identification. The auto-detected list often misses the real category players. The better tools run live web search to find actual competitors, not just the ones in some pre-loaded database.
Third, the output. Most collapse everything into one visibility score. That's worthless if you don't know whether you're invisible at the awareness stage versus the comparison stage. Useful tools break it down by stage and topic zone - brand, category, problem, comparison, local - then give you a prioritised fix list for the actual gaps.
One extra piece if your business has physical locations or serves multiple cities: most tools roll up averages instead of distributing prompts per city. You might think you're visible when one city is completely dark. That's a gap worth checking before you commit.
Happy to compare notes if you're deep into evaluating these.