NanoPDF vs WatchPDF
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
NanoPDF
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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!
WatchPDF
View PDF files directly on your Apple Watch. This app allows you to access and navigate PDFs stored on your paired iPhone without needing to transfer them. Enjoy convenient PDF viewing anytime, anywhere.
- View PDFs on Apple Watch
- Stream PDFs from iPhone
- Zoom and navigate pages
- Support for password-locked PDFs
- Adjustable screen brightness
- App Lock feature
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PDF app for Apple Watch only View PDF files by inserting them into your Apple Watch. You can check PDF files anytime, anywhere on your Apple Watch. The watch app can be run alone, but To send PDF files to Apple Watch, you need the iPhone app. Please make sure you have an Apple Watch before purchasing the app. The iPhone app does not support viewing PDF files. The iPhone app sends PDF files to a connected Apple Watch. *Features* - Device: Apple Watch (WatchOS 10+), iPhone (iOS 17+) - File: PDF - Zoom in and out: Zoom in and out of content using the zoom in/zoom out buttons. - Page mode: Switch pages back and forth and go to a specific page - Vertical mode: Navigate pages by scrolling up and down in the list - Support for password-locked PDFs - Runs alone on Apple Watch, iPhone app required for file transfer - Touch the content screen to hide and display various menus and buttons - App screen brightness - App Lock: Only possible when the watch is password-protected ** Phone Streaming ** - Browse and open files inside nearby iPhone app from paired Apple Watch app, and switch pages - Access, browse, and open files on your iPhone from your watch without transferring them to your watch - Paired iPhone and Apple Watch must be in close proximity, and install and run the app on iPhone - Page quality will be adjusted. ** Search "WatchPDF" on YouTube to watch a usage video. ** Our app does not provide separate PDF files. PDF files can be viewed by inserting the file stored by the app user into the app.
Screenshots
Verdict
The clearest difference is price: NanoPDF at Free against WatchPDF's $4.99. WatchPDF's advantage is update cadence (weekly vs every 6 weeks) and iOS requirement (16.0 vs 18.6). On ads, in-app purchases and device support 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
NanoPDF is free to download; WatchPDF costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.
NanoPDF ships an update every 6 weeks, WatchPDF weekly. The most recent releases landed on October 7, 2026 and October 2, 2026 respectively.
| Parameter | NanoPDF | WatchPDF |
|---|---|---|
| Price | Free — better | $4.99 |
| Rating | — | 5.0 (1 ratings) — better |
| Positive reviews | — | 88.9% of reviews |
| Number of ratings | — | 1 — better |
| Update frequency | Every 6 weeks | Weekly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Paid |
| Devices | iPhone, iPad, Apple Watch — better | iPhone, Apple Watch |
| Requires iOS | 18.6 | 16.0 — better |
| Further details — not scored | ||
| Size | 6 MB | 16 MB |
| Age rating | 4+ | 4+ |
| Developer | Giovanni Outerleys | kim juyoung |
In-app purchases
NanoPDF
No in-app purchases
WatchPDF
No in-app purchases








