PDF Expert, the powerful PDF viewing and editing application from Readdle, got a big update today that features few new features and tweaks to make it even more useful along with a big speed boost.

The big news, though, is that PDF Expert is a universal app for the first time. Where previous versions were device-specific for the iPhone and iPad, PDF Expert 5.1 brings both interfaces together in one app. To accommodate the change, the old iPhone version has been retired. Version 5.1, which was formerly iPad-only, will now work on the iPhone as well, with all features supported across both devices.

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Beyond that, the update includes a significant boost in performance: the app is now twice as fast as its predecessor, which is especially useful when searching or annotating large documents. Users will also find a new continuous-scrolling mode that makes breezing through long files easier than ever.

You’ll also find that PDF Expert is now capable of completing calculations in files created using Adobe Acrobat or LiveCycle Designer software. While it’s not a feature everyone will need, it’s definitely a useful addition to the app’s toolset.

PDF Expert 5.1 is available on the App Store for $9.99. Users who owned the previous iPad version will be able to download the upgrade for free. Users who previously owned the iPhone-only version will need to buy the update at full price.

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