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(Credit: Dusan Petkovic, Shutterstock / Dusan Petkovic)

Adobe Acrobat Reader (download for Android) may be the go-to app for viewing, annotating, collaborating on, filling out, signing and storing PDF documents on your phone or tablet.

But you'll have to pay $24.99 per month for an Adobe Acrobat Pro DC subscription to take advantage of many of the app's most coveted features, such as organizing and editing PDFs, creating PDFs from documents and images, exporting PDFs to other file formats, combining multiple files into a single PDF and sending documents to reviewers. Or maybe you don't even need the comprehensive toolset that Adobe's premium subscription offers.

Whether you're looking for a more affordable PDF editor or only need one that's more barebones to complete a simple task like signing a contract, we've got you covered with our picks for the best alternatives to Adobe Acrobat Reader.

SEE: Best PDF editor app alternatives to Adobe Acrobat for iOS

1. Adobe Fill & Sign: Easy PDF Form Filler

Adobe Fill & Sign (download for Android) allows users to fill out, sign and send out electronic forms for free. You can even take a photo of an existing paper form with your phone or tablet and sign and send right from your device.

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2. Xodo PDF Reader & Editor

Xodo PDF Reader & Editor (download for Android) allows you to quickly read, annotate, comment on, fill out, sign and manage your PDFs -- all for free.

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3. PDFelement

The free Wondershare PDFelement (download for Android) app helps you read, fill out, edit, mark up, convert, create and sign PDF files on your Android device. You can even snap a photo of a document and convert it into a PDF to share with others.

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4. PocketBook Reader

PocketBook Reader (download for Android) is a free e-book reading app that allows you to read, bookmark and annotate PDF, EPUB, DOCX, RTF, TXT, HTML and many other document file types.

Start reading on one device and finish on another using the app's complimentary PocketBook Cloud service.

Those who'd prefer to give their eyes a break can hear text read aloud using the app's text-to-speech feature and even listen to audiobooks with the app. Put on bedtime stories confident that -- with the sleep timer set -- your device will automatically turn off after you fall asleep.

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5. ezPDF Reader PDF Annotate Form

For $3.99, the ezPDF Reader PDF Annotate Form (download for Android) lets users view multimedia and frame-animation PDF pages, as well as annotate, fill out and sign PDF documents in the app.

Want to spare your eyes some strain? Then let the app read your documents aloud to you with its Voice Reading feature.

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6. SmartOffice

As its name spells out, SmartOffice - View & Edit MS Office files & PDFs (download for Android) is both a robust Microsoft Office document reader, editor, creator, presenter and sharer as well as an excellent PDF reader, annotator and converter that supports documents in over 35 languages.

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Joshua is an editor for CNET's Download.com. He covers the mobile tech and apps that power our lives and interviews celebrities about their favorite apps. Previously, he worked as an editor at Healthline and Gay.com and as a contributing writer for Mac Directory, MacAddict, SF Weekly, SF Examiner, and SF Chronicle.