Grammarly catches the errors you can already see: articles, prepositions, spelling. The ones that make you sound translated, it barely sees at all. ChatGPT can, but only with a specific prompt, and only if you stop it flattening your voice. Here is the split, and the four verdicts that keep you in charge.
Every 100-day LinkedIn post ends with a spike. Mine ends with 370 followers, 65 days of zero engagement, an archive that did nothing during an eleven-day break, and five job offers that arrived through a channel the analytics can't see. Here is the whole export.
You know "turn off" and "set up" perfectly well. You write "deactivate" and "configure" anyway, because school called those advanced. That reflex is measurable, it's the loudest signal of textbook English in copy, and the fix is not "use more phrasal verbs." It's a test.
Search for regional copywriting rates and you get confident country tables with no survey behind them. Two regions have real data. The rest is estimate. And the number that decides your rate isn't where you live, it's where your client does.
Delve is measured. Tapestry is perceived. Leverage is just a word an editor would question. Those are three different claims, and every list you've read collapses them into one. Here is the reference that doesn't, with 218 entries graded by how sure we actually are.
Delete every "delve" and "leverage" and the text still reads as machine-made. The vocabulary is the surface tell. The real one is that nothing in the draft could only have come from you. Three layers, in order, with the one that actually works last.
The accusation always arrives after the work is done, when it is too late to start documenting. So you build the paper trail while you write, not after. Four layers, set up once, and the question stops being frightening.
Most prompt lists give you fifteen ways to say "improve this," which is why the output always sounds like ChatGPT instead of you. These fifteen do three specific jobs, and each one shows what it actually produces.
Most first-client guides sell the dream. This one gives you the four-week plan and the honest probability, including what makes it fail. The bottleneck is almost never your writing. It is that nobody can see evidence you can do the job.
Most comparisons test first-draft quality. The question that matters for a working copywriter is different: after weeks of training, which model still sounds like you, and which one drifts back to sounding like itself?