Comparison

Concentrations vs Chemistry Toolbox

Price, ratings, monetisation and update history for both apps, side by side β€” with what reviewers say about each.

Head to head
About

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 instantlyβ€”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 volumeβ€”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.

About

Chemistry Toolbox

Features
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Features already available: β€’ The BEST MOLECULAR MASS CALCULATOR, by symbol or group abbreviation e.g. K4Fe(CN)6.3H2O, AcOMe... β€’ A periodic table, with element characteristics and a dynamic comparison table β€’ Several calculation tools for solution preparation (dilution, molar mass, molar concentration and density), and converter β€’ Solubility table β€’ pH color indicators β€’ NMR (proton, carbon, constants and multiplets) β€’ Data on common solvents (polarity, elution strength, boiling point, density...) β€’ pKa β€’ Buffer solutions β€’ Organic functions (amino acids, monosaccharides, aromatic compounds, alkanes) β€’ Standard oxidation-reduction potentials β€’ ...

Screenshots

Concentrations4 screens
Chemistry Toolbox4 screens

Verdict

The call

The clearest difference is in-app purchases: Concentrations at none against Chemistry Toolbox's 2. Chemistry Toolbox's advantage is update cadence (daily vs every 3 months). On price, ads, device support and iOS requirement there is nothing between them.

Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. Chemistry Toolbox sells 2 one-off in-app purchases. Concentrations asks for nothing beyond the download.

UpkeepUpdate frequency

Concentrations ships an update every 3 months, Chemistry Toolbox daily. The most recent releases landed on October 1, 2026 and October 19, 2026 respectively.

Scorecard2 real differences Β· 4 level
Concentrations versus Chemistry Toolbox: the parameters behind the verdict, then further details
ParameterConcentrationsChemistry Toolbox
PriceFreeFree
Update frequencyEvery 3 monthsDaily β€” better
AdsNoNo
In-app purchasesNo β€” betterYes
DevicesiPhoneiPhone, iPad β€” better
Requires iOS18.517.6 β€” better
Further details β€” not scored
Size7 MB12 MB
Age rating4+4+
DeveloperMarcal Casas CartagenaFlorent Breton

In-app purchases

None

Concentrations

No in-app purchases

2 purchases

Chemistry Toolbox

One-time2
  • One month subscription$0.99
  • Full app$4.99

Questions

Is Concentrations free?
Concentrations is free to download, with no in-app purchases.
Is Chemistry Toolbox free?
Chemistry Toolbox is free to download, with in-app purchases available.
Do Concentrations or Chemistry Toolbox have ads?
Neither Concentrations nor Chemistry Toolbox shows ads.
Which is updated more often, Concentrations or Chemistry Toolbox?
Concentrations ships an update every 3 months, and Chemistry Toolbox daily. Most recently, Concentrations was updated on October 1, 2026 and Chemistry Toolbox on October 19, 2026.

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