Comparison

Watch PDF Reader vs NanoPDF

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Watch PDF Reader

Access and view PDF documents directly on your Apple Watch. Convert photos and scans into PDFs on your iPhone, then transfer them for offline viewing and quick reference on the go. Zoom in to see every detail.

Highlights
  • View PDFs on Apple Watch
  • Convert photos to PDF
  • Scan documents to PDF
  • Import PDFs from Files app
  • Offline PDF viewing
  • Zoom functionality
Features
Read full description

This is a simple but powerful PDF viewer for your Apple Watch. Having PDFs on your Apple Watch gives you following benefits 1. Convenience: Having PDFs on a smartwatch allows for easy access to important documents without having to pull out a phone or computer. This can be especially useful for people who are always on the go. 2. Quick reference: PDFs on a smartwatch can be used as quick reference guides for things like recipes, instructions, or presentations. This can be helpful for people who need to quickly look up information while they're away from their main device. 3. On-the-spot Decision Making: In a meeting or a presentation, having PDFs on smartwatch can be helpful for taking quick notes, making decisions and take actions on the spot. The iPhone app has a simple user-friendly PDF converter integrated so that you could create PDFs easily. Using iPhone app you could create PDFs from Photos & Scans.  You could also import your existing PDFs from Files app. The created/imported PDFs could be transferred to your Apple Watch with one single tap. The Apple Watch app lets you view the PDFs offline on the go. The zoom feature on the Apple Watch lets you view every little detail of your PDF.

About

NanoPDF

Access and view your PDF documents directly from your Apple Watch. Seamlessly sync files from your iPhone, zoom with a tap, and navigate pages intuitively using the Digital Crown. Manage your portable PDF library effortlessly.

Highlights
  • Quick PDF access on Apple Watch
  • Seamless iPhone to Watch sync
  • Easy tap-to-zoom functionality
  • Intuitive Digital Crown navigation
  • Simple PDF deletion from watch
  • Integrated user tutorial
Read full description

Discover NanoPDF, the app that transforms how you access PDF documents by making them available right on your Apple Watch. With NanoPDF, your essential files are with you everywhere, whether for work or leisure, making viewing your documents an effortless experience. Here’s a glimpse of the key features: Quick Access: Browse your PDFs with ease directly from your watch. Seamless Sync: Select a PDF on your iPhone and find it instantly on your watch. Easy Zoom: A simple tap on your watch screen to zoom for optimal reading, even of the most delicate texts. Ergonomic Navigation: The Digital Crown enables intuitive navigation through pages and zooming into specific details. Simple Deletion: Once finished reading, quickly delete the PDF from your watch. Integrated Guide: New to NanoPDF? Our built-in tutorial will quickly get you comfortable with all the features offered. NanoPDF is the perfect companion for professionals on the move, and anyone looking to blend productivity with mobility. Download NanoPDF today and transform your watch into a dynamic portable library for all your PDFs!

Screenshots

Watch PDF Reader4 screens
NanoPDF4 screens

Verdict

The call

The clearest difference is price: NanoPDF at Free against Watch PDF Reader's $4.99. NanoPDF also leads on rating (5.0 vs 3.1). Watch PDF Reader's advantage is ratings volume (16 vs 1) and iOS requirement (16.0 vs 18.6). On update cadence, ads, in-app purchases and monetization model there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

NanoPDF is free to download; Watch PDF Reader costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

NanoPDF holds the better App Store score, 5.0 against 3.1. That said, the two scores are not equally well evidenced: Watch PDF Reader has 16 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

Watch PDF Reader ships an update every 3 weeks, NanoPDF every 6 weeks. The most recent releases landed on November 12, 2026 and November 3, 2026 respectively.

Scorecard4 real differences · 6 level
Watch PDF Reader versus NanoPDF: the parameters behind the verdict, then further details
ParameterWatch PDF ReaderNanoPDF
Price$4.99Free — better
Rating3.1 (16 ratings)5.0 (1 ratings) — better
Positive reviews28.9% of reviews—
Number of ratings16 — better1
Update frequencyEvery 3 weeks — betterEvery 6 weeks
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, Apple WatchiPhone, iPad, Apple Watch — better
Requires iOS16.0 — better18.6
Further details — not scored
Size37 MB6 MB
Age rating12+4+
DeveloperEngels Cybersecurity & Consulting GmbHGiovanni Outerleys

Bugs and requests

Watch PDF Reader

Reported bugs

9 issues
  • App crashes
  • Syncing issues between phone and watch
  • Documents not displaying on watch
  • Refresh button only visible
  • Cannot load files
Show 4 more
  • App closes with multi-page documents
  • Not connecting to Apple Watch
  • Files not syncing
  • App crashes during sync

Requested features

5 requests
  • Support for complications
  • Improve page navigation while zoomed
  • Faster file upload
  • Better image quality
  • Improved user interface

NanoPDF

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Watch PDF Reader

No in-app purchases

None

NanoPDF

No in-app purchases

Questions

Is Watch PDF Reader free?
Watch PDF Reader costs $4.99, with no in-app purchases.
Is NanoPDF free?
NanoPDF is free to download, with no in-app purchases.
Which has better reviews, Watch PDF Reader or NanoPDF?
NanoPDF is rated higher. Watch PDF Reader averages 3.1 out of 5 from 16 ratings, while NanoPDF averages 5.0 from 1 ratings.
Do Watch PDF Reader or NanoPDF have ads?
Neither Watch PDF Reader nor NanoPDF shows ads.
Which is updated more often, Watch PDF Reader or NanoPDF?
Watch PDF Reader ships an update every 3 weeks, and NanoPDF every 6 weeks. Most recently, Watch PDF Reader was updated on November 12, 2026 and NanoPDF on November 3, 2026.

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