NSI Pro vs Ply Inventory
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
NSI Pro
This app allows NCI-Certified Contractors to activate and pair with National Safety Instruments' Bluetooth-enabled low-level carbon monoxide monitors. It specifically supports devices like the NSI 6000 for professional use.
- Bluetooth connectivity
- Device activation
- Monitor pairing
- Carbon monoxide monitoring
- NSI 6000 support
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The NCI-Certified Contractor's app for activating and pairing with National Safety Instruments' Bluetooth-enabled low-level carbon monoxide monitors such as the NSI 6000.
Ply Inventory
Manage your business inventory with automated supplier pricing and streamlined kit requests. This app offers improved performance and stability for a smoother user experience.
- Automated supplier pricing for POs
- Request whole kits for field requests
- Faster performance
- Fewer crashes
- Simplified inventory tracking
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**Your Suppliers, Auto-Loaded** Creating POs? We'll now grab pricing from your go-to suppliers automatically. It's like having a really efficient personal assistant. **Kits in Field Requests** Because requesting one item at a time is so 2024. Add whole kits to your field requests now. **The Boring (But Important) Stuff** Faster performance, fewer crashes, and generally making your life easier.
Screenshots
Verdict
The clearest difference is rating: Ply Inventory at 5.0 against NSI Pro's 3.0. Ply Inventory also leads on update cadence (weekly vs every 2 weeks) and ratings volume (11 vs 2). NSI Pro's advantage is iOS requirement (11.0 vs 16.0). On price, 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Ply Inventory holds the better App Store score, 5.0 against 3.0. That said, the two scores are not equally well evidenced: Ply Inventory has 11 ratings behind it against 2, so its average is the more settled of the two.
NSI Pro ships an update every 2 weeks, Ply Inventory weekly. The most recent releases landed on October 24, 2026 and October 30, 2026 respectively.
| Parameter | NSI Pro | Ply Inventory |
|---|---|---|
| Price | Free | Free |
| Rating | 3.0 (2 ratings) | 5.0 (11 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | 2 | 11 — better |
| Update frequency | Every 2 weeks | Weekly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 11.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 30 MB | 73 MB |
| Age rating | 4+ | 4+ |
| Developer | National Comfort Institute, Inc. | Ply Financial, Inc |
Customer experience
NSI Pro
Ply Inventory
In-app purchases
NSI Pro
No in-app purchases
Ply Inventory
No in-app purchases
