PDF Viewer＆Scanner

Review by eFreeware

PDF Viewer & Scanner is a free Android app in the Tools category, published by developer Emily Yu. It is built around a simple promise: reading and managing documents on a phone without bouncing between several utilities. It is a document processing assistant, and the feature set backs that up with format support, annotation, scanning, file assembly and password protection.

That combination is the main reason to consider it. Most phone document apps do one job well and leave the rest to someone else. This one gathers the everyday tasks into a single download, which matters if you deal with contracts, class readings, invoices or forms on a handset rather than a laptop.

The app has been installed more than 10 million times and holds a 3.8 average from 32,600 ratings, with 432 written reviews. It was released on July 5, 2024 and last updated on September 1, 2026. It is free to download, carries ads and offers no in-app purchases, and it is rated for Everyone.

Reading formats beyond PDF

The app opens PDF files along with Word, PPT and Excel documents, so a single viewer covers the formats most offices, schools and households actually send around. If you regularly receive a mix of attachments and want to check them without installing a separate reader for each type, that breadth is the point.

The developer pitches this as reading that works whenever and wherever you need it, which is the usual claim for a viewer. What matters more is the modest, useful idea behind it: one place to open the common document types rather than a folder full of single-purpose apps.

For anyone who reviews material on a phone before sitting down at a computer, a viewer that handles several formats is a convenience worth having. It reduces the friction of opening an unfamiliar attachment on the spot instead of forwarding it to yourself for later.

Marking up a PDF as you read

You can highlight, underline or strike through text in a PDF. These are the three marks most people reach for when working through a document: flagging what matters, emphasizing a line, or crossing out something that no longer applies.

I would expect this to appeal to students working through readings, or to anyone reviewing a draft and wanting to leave visible notes before passing it on. It is annotation rather than full editing, so the marks are for your own reference or for whoever opens the file next.

Because the marks live in the PDF itself, the workflow stays simple: open the file, mark it up, save it.

Turning paper into a PDF with the camera

Scanning turns paper documents into PDFs using the phone's camera. That covers the ordinary cases: a receipt you need to keep, a signed form to send back, a page from a book, a printed handout from a meeting.

This is the feature that makes the app more than a viewer. Once a page is captured as a PDF, it can be treated like any other file in the app, which is where the merge, split and encryption tools come in. Scanning is presented as a quick step rather than a production process, which matches how most people use a phone camera for documents.

If your paperwork arrives as physical sheets and leaves as a file, this is the part of the app you would use most. It saves a trip to a flatbed scanner for the small jobs that do not justify one.

Merging, splitting and locking files

PDF Merge and Split does exactly what the names suggest. You can combine several PDFs into a single file, or break a large PDF into smaller parts. Merging is useful when a project arrives as a dozen separate scans and needs to go out as one document; splitting helps when only part of a long file is relevant to the person receiving it.

Encryption adds password protection to PDF files, which the developer frames as a way to keep documents secure. For anyone sending a financial statement, an identification document or a contract, a password on the file is a reasonable extra step before it leaves your hands.

Together these three tools cover the housekeeping side of document work: assembling, dividing and protecting files. They are not glamorous features, but they are the ones that come up repeatedly once you start handling documents on a phone.

What the free download involves

The app costs nothing to download and is supported by ads. There are no in-app purchases, so none of the tools described sit behind a paid tier, a subscription or a one-off unlock. The feature set you read about is the feature set you get.

The trade-off is the advertising. How the ads are placed or how often they appear is not clear, but a free app with this many installs will show them somewhere, and that is the price of admission.

For most people the calculation is straightforward: a free tool that handles reading, scanning and file management, with ads along the way. The 3.8 average from a large number of ratings suggests a broadly workable app rather than a flawless one, which is about what you would expect at this price.

How it compares with the alternatives

The obvious comparison is a dedicated PDF reader, which typically opens PDFs and little else. If your documents are always PDFs, a single-format reader may be all you need, and it will often be leaner. This app is most useful when Word, PPT and Excel files also land in your inbox.

The other comparison is a standalone scanner app. Those tend to focus on capture and cleanup, whereas here scanning feeds into a broader set of tools for merging, splitting and protecting the resulting files. If you scan occasionally and then need to do something with the output, having both in one place saves a step.

There is also the option of desktop software for the heavier jobs. A phone app is convenient for reading, marking up and quick assembly, but large-scale document work still tends to be easier on a computer. This app is best understood as the phone-sized version of those tasks, not a replacement for them.

A practical pick for phone-based document work

PDF Viewer & Scanner is worth installing if documents regularly arrive on your phone and you want to read them, mark them up, scan the occasional page and tidy the results without installing several apps. The mix of formats, annotation, camera capture, merging, splitting and password protection covers the common ground well.

The free price and the absence of in-app purchases make it easy to try, with ads as the cost. The 3.8 rating from a large install base is a fair signal: useful and widely used, without being exceptional. If you need a single place to handle everyday document tasks on Android, this one is a reasonable starting point.