Smallpdf's free plan caps you at a small, strict number of tasks per day before it asks you to upgrade to Pro. Because iampdf never uploads your file to a server in the first place, there's nothing to meter — you can convert, merge, or compress as many files as your device can handle, back to back.
Compared against Smallpdf’s own pricing page, last checked August 2026. Their plans can change after that date — verify current details on their site before relying on this for a purchase decision.