Comparison

Stoichiometry vs Matrix

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

Head to head
About

Stoichiometry

This tool helps balance chemical reactions and calculate molar masses, moles, and actual masses of reactants and products. It supports various formula formats and can identify limiting reagents. Data can be sent to another app for gas phase calculations.

Highlights
  • Balance chemical reactions
  • Calculate molar masses
  • Determine moles and actual masses
  • Identify limiting reagents
  • Supports various formula formats
  • Integrates with Gas Phase Stoichiometry app
Features
Read full description

Stoichiometry is an ultimate tool for balancing chemical reactions, finding molar masses, moles and actual masses of reactants and products based on their chemical formulas, stoichiometric coefficients and any quantitative data provided, that available on Apple Store for iOSΒ and Mac . It is enough to provide initial or final (after reaction accomplishment) mass or moles of one of the reaction component, to calculate all required and obtained masses and moles of all components. If data is available for several components, then limiting reagent will be found based on reaction stoichiometry. Molecular formula format: charge or unpaired electrons (in free radicals), if exist, must be provided as well, separated by coma: Na,+ ; R,: ; SO4,2- . Application supports state indexes: (g), (s), (l), (aq) – all are lowercase only, placed at the end of compound formula. App can send the data toΒ  Gas Phase Stoichiometry app to further calculate pressures and volumes of gaseous compounds. Either moles or masses can be filled in, but if by mistake both are provided and they don’t match, then the moles value will have a preference. Component will be taken into consideration once the stoichiometric coefficient is provided for it. For balancing redox reactions please refer to Electrochemistry application. Further information and examples are provided at http://www.volard.wordpress.com.

About

Matrix

Features
Read full description

The MatrixAnalysis is carefully designed to be a simple and elegant app. This app has tools to help you analyze matrices like finding eigenvalues and eigenvectors, diagonalization, QR, SLU, LU factorization. This app can also be used to do matrix operations like, finding inverse, determinant, dot product, cross product, and much more. You can also do elementwise operations and scalar operations. Want to do fast fourier transform (FFT) or inverse fourier transform (IFFT), this app is capable of IFFT Want to find an pseudo inverse of a non-square matrix, this app has you covered Want to know a rotation matrix for a given angle or rotate a vector by the given angle? This app has you covered. The expressions and the solutions are displayed in beautiful mathematical way. Once the expressions are solved, a beautifully written solutions are created that you can share with other or save it locally. It automatically saves your hard work locally on your device so you can come back and pick up from where you left off as your great effort will not be lost. There is also a Study page to help you with learning some important matrix vector formulas and some useful technique. This is an app for all student groups. From high school to college to university students. Be creative. Enjoy the app!

Screenshots

Stoichiometry4 screens
Matrix4 screens

Verdict

The call

The clearest difference is price: Matrix at $1.99 against Stoichiometry's $2.99. Matrix also leads on iOS requirement (15.1 vs 17.1). On update cadence, ads, in-app purchases and device support 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

Stoichiometry costs $2.99 and Matrix $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Stoichiometry ships an update every 2 months, Matrix every 5 weeks. The most recent releases landed on September 7, 2026 and August 16, 2026 respectively.

Scorecard2 real differences Β· 6 level
Stoichiometry versus Matrix: the parameters behind the verdict, then further details
ParameterStoichiometryMatrix
Price$2.99$1.99 β€” better
Positive reviews50.0% of reviewsβ€”
Update frequencyEvery 2 monthsEvery 5 weeks β€” better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidβ€”
DevicesiPhone, iPadiPhone, iPad, iPod β€” better
Requires iOS17.115.1 β€” better
Further details β€” not scored
Size1 MB28 MB
Age rating4+4+
DeveloperRoman VolinskyOm Prakash Chapagain

In-app purchases

None

Stoichiometry

No in-app purchases

None

Matrix

No in-app purchases

Questions

Is Stoichiometry free?
Stoichiometry costs $2.99, with no in-app purchases.
Is Matrix free?
Matrix costs $1.99, with no in-app purchases.
Do Stoichiometry or Matrix have ads?
Neither Stoichiometry nor Matrix shows ads.
Which is updated more often, Stoichiometry or Matrix?
Stoichiometry ships an update every 2 months, and Matrix every 5 weeks. Most recently, Stoichiometry was updated on September 7, 2026 and Matrix on August 16, 2026.

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