# MX3 Diagnostics vs Karecirc

The clearest difference is in-app purchases: MX3 Diagnostics at none against Karecirc's 2. MX3 Diagnostics also leads on update cadence (every 3 weeks vs every 2 months). Karecirc's advantage is iOS requirement (13.0 vs 15.0). On price, ads and device support there is nothing between them.

Both are free to download. Karecirc sells 2 in-app purchases, starting at $5.00 per month. MX3 Diagnostics asks for nothing beyond the download.

MX3 Diagnostics ships an update every 3 weeks, Karecirc every 2 months. The most recent releases landed on November 3, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | MX3 Diagnostics | Karecirc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/mx3-diagnostics/id1473092965/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Monetization | Free | — |
| Size | 115 MB | 89 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [MX3 DIAGNOSTICS](https://appshunter.io/developer/1309508113) | [Karecirc LLC](https://appshunter.io/developer/1638851566) |

## What reviewers say

### 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


### Karecirc

[App page](https://appshunter.io/ios/app/karecirc/id1638851324)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Base Subscription | $5.00 | per month |
| Monthly Premium Subscription | $10.00 | per month |


## Frequently asked questions

### Is MX3 Diagnostics free?

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

### Is Karecirc free?

Karecirc is free to download, with in-app purchases available.

### Do MX3 Diagnostics or Karecirc have ads?

Neither MX3 Diagnostics nor Karecirc shows ads.

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

MX3 Diagnostics ships an update every 3 weeks, and Karecirc every 2 months. Most recently, MX3 Diagnostics was updated on November 3, 2026 and Karecirc on November 7, 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.*