Helium 10 is a serious Amazon toolkit, and some authors use it. But it measures the supply side — keywords and competition — not what readers are asking for. For romance, that distinction matters.
Fair play first: Where Helium 10 is strong: deep Amazon keyword and listing tooling, big data, a free plan. If you’re optimising an existing product listing, it’s powerful.
Helium 10 vs Tropesmith + PlotProse, side by side
The verdict
Helium 10 optimises a book you’ve already written; Tropesmith helps you pick the right one to write. Use keyword tools after you’ve chosen the winning trope — not to choose it.
Tropesmith scores your exact trope stack on live demand vs supply — the archetypes, heat, comps and cover direction readers are asking for that nobody’s writing yet.
Get your book’s demand-vs-supply Map →New here? Start with the free romance trope library or the 2026 demand report.