Context · Streaming
The rating on a show, game or app is a single label covering wildly different things, so it tells you almost nothing about the one detail you actually want, which is what specifically is in it.
One label, several very different reasons
The same rating in the streaming app gets applied for language, for a frightening scene and for sustained cruelty, and those land on a child in completely different ways. A parent who is relaxed about swearing and careful about horror gets no help at all from the number, because it never says which one it was for.
App store ratings are self-reported
Games and apps are usually rated on information the developer supplies, and the rating rarely reflects what other players say to your kid in chat, which is often the real risk. An app rated for nine-year-olds can still have an open chat channel in it.
Where the useful information is
Sites that list scenes rather than assign a grade give you what the app's rating cannot, which is the specific moment at the specific minute. Searching one of those with your kid takes two minutes and turns your no into a reason instead of a rule.