PDF Expert by Readdle is the most-loved Mac and iPad PDF app. The annotation feel is exceptional and the design is genuinely Apple-tier.
Flint runs in browsers, including on iPad. Here is the comparison.
Where PDF Expert wins
Beautiful UI. Best-in-class iPad annotation with Apple Pencil. Offline by default. Strong reading experience.
Where Flint wins
Cross-platform browser tool — Windows, ChromeOS and Linux included. Day pass billing. Sign-pdf, convert-pdf-to-word and redact-pdf in one editor.
Pricing compared
PDF Expert is around $79.99/year. Flint Pro is similar on annual; the day pass is unique to Flint.
Best for…
PDF Expert for Mac and iPad obsessives. Flint for cross-device users.
FAQ
Is PDF Expert worth it on Mac alone?
Yes if you spend hours a day in PDFs and want the prettiest app. Otherwise Flint covers it.
Can I switch later?
Yes — both produce standard PDFs.
Which has the better iPad experience?
PDF Expert, comfortably.
iPad-heavy: PDF Expert. Cross-device: Flint.