Concentrations vs APHL Lab Matters
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Concentrations
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Concentrations is a powerful chemical calculator designed for laboratory professionals who need fast, accurate concentration calculations in the field. Say goodbye to manual dilution factor calculations, density conversions, and purity adjustments. The Problem We Solve: Ever needed to prepare a 1M sulfuric acid solution, but your stock bottle only shows "98% w/w" with molecular weight and density? Concentrations does the complex math for you instantly—just input your stock solution data and get precise preparation instructions with a single tap. Key Features: Smart Dilution Calculator – Calculate dilution parameters from stock solutions or known molar concentrations with ease Comprehensive Concentration Types – Support for Molar, Normal, Molal, Mole Fraction, Mass Concentration, Volume Fraction, and more Simple Input, Powerful Results – Enter your compound's molecular weight, desired concentration, and volume—Concentrations handles the rest Customizable Precision – Adjust decimal places in results to match your experimental requirements Localized Interface – Automatically adapts decimal indicators to your regional format Who It's For: Perfect for chemists, laboratory technicians, students, and researchers who need reliable concentration calculations without the hassle of manual computation. Stop fumbling with calculators and conversion tables. Get accurate results every time with Concentrations.
APHL Lab Matters
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.
- 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
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The Association of Public Health Laboratories (APHL) works to strengthen laboratory systems serving the public’s health in the US and globally. APHL’s member laboratories monitor and detect a variety of potential health threats.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Concentrations | APHL Lab Matters |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (2 ratings) — better |
| Number of ratings | — | 2 — better |
| Update frequency | Every 3 months — better | Every 9 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone | iPhone, iPad, iPod — better |
| Requires iOS | 18.5 | 11.0 — better |
| Further details — not scored | ||
| Size | 9 MB | 74 MB |
| Age rating | 4+ | 12+ |
| Developer | Marcal Casas Cartagena | The Association of Public Health Laboratories, Inc. |
In-app purchases
Concentrations
No in-app purchases
APHL Lab Matters
No in-app purchases
Questions
Is Concentrations free?
Is APHL Lab Matters free?
Do Concentrations or APHL Lab Matters have ads?
Which is updated more often, Concentrations or APHL Lab Matters?
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