# NSI CO Monitor — NSI CO Monitor Companion App

> Companion app for NSI Bluetooth carbon monoxide monitors, viewing logs and measurements. (iPhone/iPad app by National Comfort Institute, Inc..)

- Source: https://appshunter.io/ios/app/nsi-co-monitor/id1479590527 (this page in markdown: same URL + `.md`)
- Developer: [National Comfort Institute, Inc.](https://appshunter.io/developer/1097845247)
- Category: Utilities, Health & Fitness
- Price: Free
- Age rating: 4+
- Requires: iOS 11.0 · 24 MB
- Languages: English
- Released: 2021-05-21
- Data updated: 2026-06-01
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/nsi-co-monitor/id1479590527/reviews.md

## What is NSI CO Monitor?

A mobile app companion to National Safety Instruments' Bluetooth-enabled low-level carbon monoxide monitors such as the NSI 6000.  Used for syncing with the monitor's logs and viewing stored Carbon Monoxide measurements.

## Key features

- Syncs with Bluetooth CO monitors
- View stored carbon monoxide measurements
- Access monitor logs
- Companion app functionality

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/nsi-co-monitor/id1479590527/reviews.md

### 1/5 — Doesn’t work

*2026-01-13*

Says my monitor needs activation, and the “Pro” app crashes when trying to activate it, so it can’t be activated. The contractor wasn’t sure what to do.

## Frequently asked questions about NSI CO Monitor

### What is NSI CO Monitor used for?

NSI CO Monitor is a companion app for National Safety Instruments' Bluetooth-enabled carbon monoxide monitors. It allows you to sync with your monitor, view stored carbon monoxide measurements, and access device logs.

### What devices is NSI CO Monitor compatible with?

NSI CO Monitor is available for iPhone, iPad, and iPod devices. It requires iOS 11.0 or later.

### Is NSI CO Monitor free to download?

Yes, NSI CO Monitor is a free application. There are no in-app purchases or subscription fees associated with its use.

### Does NSI CO Monitor have ads?

No, NSI CO Monitor does not contain advertisements. It is a completely ad-free experience for users.

### How often is NSI CO Monitor updated?

The app was last updated on June 26, 2021, to version 1.0.5. Future updates will depend on the developer's release schedule.

### What is the age rating for NSI CO Monitor?

NSI CO Monitor has an age rating of 4+. This indicates it is suitable for general audiences and does not contain mature content.

### Which specific NSI monitors work with this app?

This app is designed as a companion for National Safety Instruments' Bluetooth-enabled low-level carbon monoxide monitors, such as the NSI 6000 model.

## Version history (last 5 releases)

### 1.0.5 — 2021-06-26

Edit and Manage a Monitor's Details.

### 1.0.4 — 2021-06-22

Minor change to Monitor Information for the cloud.

### 1.0.3 — 2021-06-20

Refresh Main Screen List of Monitors and Locations
Edit and Update Monitor Details

### 1.0.2 — 2021-06-09

Enhanced consistency of pairing/syncing with monitor.
Cleaner detach from monitor after sync complete.
Fix an issue in the Claim Device procedure.
Added app version number to navigation bar.

### 1.0.1 — 2021-06-04

Minor bug fix in Monitor Claim Process.

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## More apps by National Comfort Institute, Inc.

- [AirMaxx Mobile](https://appshunter.io/ios/app/airmaxx-mobile/id1313263134)
- [AirMaxx Lite](https://appshunter.io/ios/app/airmaxx-lite/id1319340072)
- [NSI Pro](https://appshunter.io/ios/app/nsi-pro/id1479575341)

All apps by National Comfort Institute, Inc.: https://appshunter.io/developer/1097845247

## Related topics

[nsi co monitor](https://appshunter.io/ios/topics/nsi-co-monitor) · [nsi pro](https://appshunter.io/ios/topics/nsi-pro) · [carbon monoxide](https://appshunter.io/ios/topics/carbon-monoxide) · [free carbon monoxide detector](https://appshunter.io/ios/topics/free-carbon-monoxide-detector)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-01.*