# Concentrations vs APHL Lab Matters

The clearest difference is update cadence: Concentrations at every 3 months against APHL Lab Matters's every 9 months. APHL Lab Matters's advantage is device support (3 vs 1) and iOS requirement (11.0 vs 18.5). On price, 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.

Concentrations ships an update every 3 months, APHL Lab Matters every 9 months. The most recent releases landed on November 6, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | Concentrations | APHL Lab Matters |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/aphl-lab-matters/id1156370719/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 9 months |
| Monetization | — | Free |
| Size | 9 MB | 74 MB |
| Requires iOS | 18.5 | **11.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [Marcal Casas Cartagena](https://appshunter.io/developer/468150889) | [The Association of Public Health Laboratories, Inc.](https://appshunter.io/developer/606229774) |

## What reviewers say

### Concentrations

[App page](https://appshunter.io/ios/app/concentrations/id468150886)

**In-app purchases:** none


### APHL Lab Matters

[App page](https://appshunter.io/ios/app/aphl-lab-matters/id1156370719)

This app provides access to a magazine focused on public health laboratories. It highlights the work of laboratories in monitoring and detecting health threats to protect public health in the US and globally.

**Highlights:** Access to Lab Matters Magazine, Information on public health laboratory systems, Details on health threat monitoring, Global and US health security insights, Updates on laboratory advancements

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Concentrations free?

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

### Is APHL Lab Matters free?

APHL Lab Matters is free to download, with no in-app purchases.

### Do Concentrations or APHL Lab Matters have ads?

Neither Concentrations nor APHL Lab Matters shows ads.

### Which is updated more often, Concentrations or APHL Lab Matters?

Concentrations ships an update every 3 months, and APHL Lab Matters every 9 months. Most recently, Concentrations was updated on November 6, 2026 and APHL Lab Matters on November 2, 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.*