Sixteen best PDF readers for Android and iPhone.

1. Adobe Acrobat Reader

Download: Android iOS

Cost: Adobe Acrobat Reader (Free) (Free), Acrobat Pro (Unavailable in app listing. Subscription pricing varies by region and plan.)

As a college student juggling tons of PDFs for classes and research, Adobe Acrobat Reader is my go-to PDF reader. It consistently outperforms other apps thanks to its seamless integration with other Adobe products and lightning-fast performance, even with huge files—something I've experienced firsthand. With over 800 million downloads, it's clearly a trusted choice, proving its reliability and widespread use. Ultimately, its speed, reliability, and smooth functionality make it worth the download.

Key Features:

• View and annotate documents.
• Organize and manage files easily.
• Supports various document formats.

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2. PDF Reader

Download: Android

PDF Reader is a versatile mobile pdf reader that's surprisingly easy to navigate, offering a wide array of tools for editing, documenting, and studying, as one user noted. While excelling at ebook reading with features like highlighting that aid comprehension – particularly helpful for rereading complex passages – it occasionally misinterprets page numbering (e.g., Roman numerals). Despite this minor flaw, the quick search, smooth scrolling, and even dark mode functionality make it a top choice. The minimal, easily skippable ads and intuitive interface, combined with the powerful (though slightly mysterious) merge and split functions, solidify its place as a robust and user-friendly PDF reader.

Key Features:

• Quickly opens and displays documents.
• Supports various file formats seamlessly.
• Offers annotation and editing tools.

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3. ReadEra

Download: Android iOS

ReadEra isn't just another PDF reader; it's my go-to app because of its blazing-fast speed and support for tons of formats beyond just PDFs—like EPUB, MOBI, and even DOCX files. Unlike other readers that bog down or crash with large files, ReadEra handles them smoothly, letting me get back to my reading without annoying lags. With over 45 million downloads, it's clearly a favorite among users, proving its reliability and ease of use. That's why I picked it – it's simple, effective, and handles everything I throw at it.

Key Features:

• Supports various document formats including PDFs.
• Offers an ad-free and offline reading experience.
• Enables seamless navigation and text customization.

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4. Document Reader

Download: Android

Document Reader is a mobile PDF reader app offering a convenient way to view and manage PDF files on smartphones and tablets. Its intuitive interface and fast loading times make accessing documents quick and easy, as evidenced by over 47 million downloads. While praised for its simplicity and broad file format support (beyond just PDFs), some users report occasional slowdowns with very large files or complex documents. Overall, Document Reader provides a solid, free solution for everyday PDF viewing needs but might not be ideal for intensive professional use.

Key Features:

• Opens various file formats easily.
• Supports seamless file organization.
• Provides a quick and efficient viewing experience.

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5. WPS Office

Download: Android iOS

Cost: Free (Free), WPS Office Premium (Unavailable - Varies by region and subscription length. Check the app for current pricing in the USA.)

WPS Office, functioning admirably as a mobile PDF reader, offers a surprisingly intuitive interface praised for its ease of navigation—perfect for crafting a book, as one user attested. While its extensive features are a major plus, cross-platform compatibility inconsistencies between iOS, macOS, and Android present a notable drawback, as some formatting and functionality may not sync seamlessly across devices. Although it lacks the ability to directly insert PDF pages into Word documents (a limitation also present in the desktop version), its overall user-friendliness and robust PDF handling capabilities make it a compelling choice for many, especially those seeking convenient mobile access to their documents. The seamless experience and ease of use outweigh the minor shortcomings for many users.

Key Features:

• Creates, edits, and views documents.
• Converts files to and from various formats.
• Provides robust annotation and markup tools.

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