O3Z vs Wrist PDF
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
O3Z
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Via BLE technology (Bluetooth Low Energy), this app allows to connect and use the ozone generator O3Z-Tech to monitor the sanitisation and download the sanitisation report.
Wrist PDF
Access and read PDF files, documents, and notes directly from your smartwatch. Enjoy fast loading, smooth navigation, and a clean interface for on-the-go document management. Seamlessly integrates with your paired phone for quick access to essential information.
- View PDFs on smartwatch
- Fast PDF loading
- Smooth page navigation
- Supports documents and notes
- Clean, wrist-friendly interface
- Works with paired phone
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WristDocs allows you to view, read, and manage PDF files directly on your smartwatch. Quickly access documents, notes, manuals, receipts, and study material right from your wrist. Enjoy fast PDF loading, smooth page navigation, and easy zoom with a clean, wrist-friendly interface. Works seamlessly with your paired phone. Key Features: • View & read PDFs on smartwatch • Fast PDF loading • Clean & minimal interface • Smooth page navigation • Supports documents, notes & manuals • Works with paired phone Perfect For: • Students viewing notes • Professionals checking quick documents • Anyone who needs PDFs on their wrist APP SUBSCRIPTION • 1-Week Plan – $3.99 • 1-Month Plan – $9.99 • 1-Year Plan – $49.99 • Auto-renewable subscription • 3-day free trial available • Subscription auto-renews unless canceled 24 hours before the end of the current period • Payment charged to Apple ID at purchase confirmation • Manage & cancel from Apple ID settings APP INFO • Privacy Policy – https://sites.google.com/view/watchpdf/home • Terms of Use – https://sites.google.com/view/watchpdf/terms-of-use • Support – https://sites.google.com/view/watchpdf/support
Screenshots
Verdict
The clearest difference is in-app purchases: O3Z at none against Wrist PDF's 3. O3Z also leads on iOS requirement (13.0 vs 15.6). Wrist PDF's advantage is update cadence (every 11 days vs every 4 months). On price, ads 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
Both are free to download. Wrist PDF sells 3 in-app purchases, starting at $3.99 per 7 days. O3Z asks for nothing beyond the download.
O3Z ships an update every 4 months, Wrist PDF every 11 days. The most recent releases landed on October 27, 2026 and October 30, 2026 respectively.
| Parameter | O3Z | Wrist PDF |
|---|---|---|
| Price | Free | Free |
| Rating | — | 3.0 (2 ratings) — better |
| Positive reviews | — | 0.0% of reviews |
| Number of ratings | — | 2 — better |
| Update frequency | Every 4 months | Every 11 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Subscription |
| Devices | iPhone, iPod | iPhone, iPod, Apple Watch — better |
| Requires iOS | 13.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 4 MB | 52 MB |
| Age rating | 4+ | 4+ |
| Developer | STEM s.r.l. | Mr Siddharth |
In-app purchases
O3Z
No in-app purchases
Wrist PDF
- Weekly Plan3 Days trial$3.997 Days
- Monthly plan3 Days trial$9.991 Month
- Yearly Plan3 Days trial$49.991 Year
