# AlertMeter vs MX3 Diagnostics

The clearest difference is rating: MX3 Diagnostics at 5.0 against AlertMeter's 4.4. MX3 Diagnostics also leads on iOS requirement (10.0 vs 16.4). AlertMeter's advantage is ratings volume (15 vs 2). On price, update cadence, ads and in-app purchases there is nothing between them.

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

MX3 Diagnostics holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: AlertMeter has 15 ratings behind it against 2, so its average is the more settled of the two.

Both ship on a similar rhythm, roughly monthly. The most recent releases landed on September 8, 2026 and August 20, 2026 respectively.

## The numbers

| Metric | AlertMeter | MX3 Diagnostics |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (15 ratings)](https://appshunter.io/ios/app/alertmeter/id1179939295/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/mx3-diagnostics/id1473092965/reviews)** |
| Number of ratings | **15** | 2 |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | Monthly |
| Monetization | Free | Free |
| Size | 25 MB | 124 MB |
| Requires iOS | 16.4 | **10.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Predictive Safety SRP, Inc.](https://appshunter.io/developer/1179939294) | [MX3 DIAGNOSTICS](https://appshunter.io/developer/1309508113) |

## What reviewers say

### AlertMeter

[App page](https://appshunter.io/ios/app/alertmeter/id1179939295)

This app helps identify when fatigue, illness, medication, or distraction may impact cognitive function. It allows individuals to regularly test their alertness levels, providing companies with a daily overview of employees in critical roles. The app is designed to respect employee privacy while assessing fitness for work.

**Highlights:** Personalized alertness testing, Company-wide daily overview, Privacy-respecting employee monitoring, Identifies impact of fatigue/illness, Assesses fitness for safety-critical roles

**Features:** Vision Pro support

**In-app purchases:** none


### MX3 Diagnostics

[App page](https://appshunter.io/ios/app/mx3-diagnostics/id1473092965)

Measure and track hydration and sweat sodium levels quickly and conveniently. This system allows athletes, coaches, and managers to manage hydration data for individuals or teams anytime, anywhere. Personalize assessments and manage athlete accounts.

**Highlights:** Perform hydration measurements, Perform sweat sodium measurements, View and edit historical data, Personalize hydration assessment, Create team/athlete accounts, Update device firmware

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

**In-app purchases:** none


## Frequently asked questions

### Is AlertMeter free?

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

### Is MX3 Diagnostics free?

MX3 Diagnostics is free to download, with no in-app purchases.

### Which has better reviews, AlertMeter or MX3 Diagnostics?

MX3 Diagnostics is rated higher. AlertMeter averages 4.4 out of 5 from 15 ratings, while MX3 Diagnostics averages 5.0 from 2 ratings.

### Do AlertMeter or MX3 Diagnostics have ads?

Neither AlertMeter nor MX3 Diagnostics shows ads.

### Which is updated more often, AlertMeter or MX3 Diagnostics?

AlertMeter ships an update monthly, and MX3 Diagnostics monthly. Most recently, AlertMeter was updated on September 8, 2026 and MX3 Diagnostics on August 20, 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.*