# NOX TESTER vs SoluThium

The clearest difference is update cadence: SoluThium at every 3 days against NOX TESTER's every 3 weeks. SoluThium also leads on iOS requirement (13.0 vs 15.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

NOX TESTER ships an update every 3 weeks, SoluThium every 3 days. The most recent releases landed on June 5, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | NOX TESTER | SoluThium |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/nox-tester/id6758373750/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 3 days** |
| Monetization | Free | — |
| Size | 5 MB | 51 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [Proformance Diagnostics LLC](https://appshunter.io/developer/1852904316) | [SoluThium, Inc.](https://appshunter.io/developer/1893853531) |

## What reviewers say

### NOX TESTER

[App page](https://appshunter.io/ios/app/nox-tester/id6758373750)

This diagnostic tool tests NOx sensors by connecting to the sensor's circuit board and probe. It activates the sensor, collects data on NOx and oxygen levels for three minutes, and analyzes the results to identify faults and generate a report.

**Highlights:** 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

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### SoluThium

[App page](https://appshunter.io/ios/app/soluthium/id6762333741)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is NOX TESTER free?

NOX TESTER is free to download, with no in-app purchases.

### Is SoluThium free?

SoluThium is free to download, with no in-app purchases.

### Do NOX TESTER or SoluThium have ads?

Neither NOX TESTER nor SoluThium shows ads.

### Which is updated more often, NOX TESTER or SoluThium?

NOX TESTER ships an update every 3 weeks, and SoluThium every 3 days. Most recently, NOX TESTER was updated on June 5, 2026 and SoluThium on September 10, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*