# NOX TESTER

> Diagnostic device and app for testing NOx sensors and generating reports. (iPhone/iPad app by Proformance Diagnostics LLC.)

- Source: https://appshunter.io/ios/app/nox-tester/id6758373750 (this page in markdown: same URL + `.md`)
- Developer: [Proformance Diagnostics LLC](https://appshunter.io/developer/1852904316)
- Category: Utilities, Productivity
- Price: Free
- Rating: 5.00/5 from 1 App Store ratings
- Age rating: 4+
- Requires: iOS 15.6 · 5 MB
- Languages: English, Russian, Chinese
- Released: 2026-02-26
- Data updated: 2026-06-05
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/nox-tester/id6758373750/reviews.md

## What is NOX TESTER?

The NOx SENSOR TESTER is a specialized testing device for NOx sensors. It connects to the sensor via a dedicated diagnostic harness. The self-developed APP+ diagnostic device communicates with the NOx sensor via CAN signals, testing the sensor circuit board and detection probe. Upon successful communication, a working command can be sent to activate the NOx sensor. The probe will then start heating up and, once it reaches its operating temperature, will continuously collect NOx values and oxygen concentration. The testing process takes 3 minutes, during which the device analyzes the collected data to determine the sensor's condition, identifies the cause of any faults, and generates a test report.

## Key features

- Connects to NOx sensor via diagnostic harness
- Communicates via CAN signals
- Tests sensor circuit board and detection probe
- Activates NOx sensor
- Collects NOx and oxygen concentration data
- Analyzes data and generates test reports


## Frequently asked questions about NOX TESTER

### What is NOX TESTER used for?

NOX TESTER is a specialized diagnostic device and app designed to test the functionality of NOx sensors. It connects directly to the sensor to analyze its performance and identify any faults.

### How long does a NOX TESTER test take?

A complete test cycle using NOX TESTER takes approximately 3 minutes. During this time, it heats the probe, collects data, and analyzes the sensor's output.

### Does NOX TESTER provide a report?

Yes, after the 3-minute testing period, NOX TESTER analyzes the collected NOx and oxygen concentration data. It then generates a comprehensive test report detailing the sensor's condition and any identified faults.

### What devices is NOX TESTER compatible with?

NOX TESTER is currently supported on iPhone and iPod devices. The diagnostic device itself connects to the NOx sensor via a dedicated harness.

### How often is NOX TESTER updated?

The latest version of NOX TESTER is 1.25, which was last updated on April 29, 2026. Updates ensure continued compatibility and performance improvements for the diagnostic tool.

### What is the age rating for NOX TESTER?

NOX TESTER has an age rating of 4+. This indicates it is suitable for a wide range of users, though its primary audience is automotive professionals.

### Does NOX TESTER have ads?

NOX TESTER does not contain advertisements. The application is free to use without any interruptions from ads.

### What is the user rating for NOX TESTER?

NOX TESTER has received a perfect rating of 5.0 stars based on one user review. This suggests a highly positive initial user experience.

## Version history (last 4 releases)

### 1.25 — 2026-04-29

Fixed some known issues.

### 1.17 — 2026-03-24

Fixed some known issues.

### 1.15 — 2026-03-18

Fixed some known issues.

### 1.00 — 2026-02-27

No release notes.

## More apps by Proformance Diagnostics LLC

- [ProformanceLink](https://appshunter.io/ios/app/proformancelink/id6755274184)

All apps by Proformance Diagnostics LLC: https://appshunter.io/developer/1852904316

## Related topics

[nox tester](https://appshunter.io/ios/topics/nox-tester) · [nox solutions](https://appshunter.io/ios/topics/nox-solutions)

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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 2026-06-05.*