O vs Nexus by Norwalt Digital
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
O
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Batch Measurement for Inspection Measure multiple O-Rings simultaneously using your iPhone camera and our advanced machine vision technology—fast and hassle-free. Size Matching Automatically identify matching O-Ring sizes from your inventory or standard size charts to streamline your workflow. Precision Measurement Get highly accurate measurements of inner diameter, cross-section, and roundness with millimeter precision. Batch Tracking Organize your measurements by purchase order and batch number for full traceability and easy record-keeping. Barcode Scanning Quickly link measurements to batches by scanning barcodes or QR codes, saving you time and reducing errors. In-App Purchases Oring Tracker offers optional in-app purchases to unlock premium features such as batch tracking, barcode scanning, and cloud sync. Subscriptions renew automatically unless canceled at least 24 hours before the end of the current period. Manage your subscription in your device settings. Perfect for manufacturers, engineers, quality control teams, and maintenance professionals who need fast, reliable O-Ring measurement and inventory management right from their iPhone. For more information read our privacy policy and terms of service: https://oringtracker.com/privacy https://oringtracker.com/terms
Nexus by Norwalt Digital
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Norwalt Nexus puts real-time machine data in the palm of your hand. Designed for Norwalt customers, this secure app provides instant access to performance metrics, machine status, event notifications, and production analytics—whether you're on the shop floor or across the globe. With Nexus, you can: - Remotely monitor your Norwalt automation systems - Receive alerts for downtime, faults, or production milestones - Track OEE and other KPIs in real-time - View historical logs and diagnostic data - Get insight into uptime, throughput, and cycle performance Built with data security in mind, Nexus ensures encrypted access and seamless integration with Norwalt systems. Take control of your productivity—wherever you are.
Screenshots
Verdict
The clearest difference is in-app purchases: Nexus by Norwalt Digital at none against O's 2. Nexus by Norwalt Digital also leads on iOS requirement (12.0 vs 17.0). O's advantage is update cadence (weekly 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. O sells 2 in-app purchases, starting at $19.99 per month. Nexus by Norwalt Digital asks for nothing beyond the download.
O ships an update weekly, Nexus by Norwalt Digital every 4 months. The most recent releases landed on November 8, 2026 and October 28, 2026 respectively.
| Parameter | O | Nexus by Norwalt Digital |
|---|---|---|
| Price | Free | Free |
| Update frequency | Weekly — better | Every 4 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 17.0 | 12.0 — better |
| Further details — not scored | ||
| Size | 22 MB | 30 MB |
| Age rating | 12+ | 4+ |
| Developer | FunPokes Inc. | Ei3 Corporation |
In-app purchases
O
- O-Ring Tracker Pro (1 Month)$19.991 Month
- O-Ring Tracker Pro (1 Year)$199.991 Year
Nexus by Norwalt Digital
No in-app purchases






