Start with the length of a typical document rather than your monthly volume. The per-scan cap determines whether a piece goes through in one pass, and that affects output quality more than any other setting.
If your documents run under 1,500 words, the free plan handles them whole — 2,000 words a month is roughly one essay. Between 1,500 and 5,000 words, Writer at $18 a month is the first plan that takes them in one go.
Studio at $29 raises the per-scan cap to 15,000 words, which covers a dissertation chapter or a long report. Team at $59 removes the per-scan cap entirely and adds 5 seats.
Annual billing is 40% off, so Writer works out at $10.80 a month paid yearly. That is a real discount rather than a rounded one — the figure on the pricing page is exact.
Plans differ by volume only. There are no features locked behind a higher tier: every plan including Free gets sentence-level detection, all three tones, and no ads.
Start on the free plan and move up when a limit gets in your way. It is genuinely usable rather than a demonstration, and it is a better guide to which tier you need than any estimate you make in advance.
One thing that should not affect the decision: none of the tiers unlocks a better rewriter or a more accurate detector. You are buying volume and document length, not quality. Any vendor whose cheaper tier produces deliberately worse output is running a different kind of business.