Comparison

Formulae Pro vs Stoichiometric equations

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

Head to head
About

Formulae Pro

This educational app provides students and teachers with a comprehensive collection of solved formulas and exercises. It uses explanatory images and videos to enhance understanding and offers search functionality for specific formulas. Improve your academic skills effectively and simply.

Highlights
  • Solved formulas and exercises
  • Explanatory images and videos
  • Search for specific formulas
  • Concept comprehension tools
  • Academic performance improvement
Features
Read full description

Our application is the perfect solution for students and teachers. It offers a wide range of solved forms and exercises with the aim of helping users better understand concepts and improve their academic performance. The application features explanatory images and videos to facilitate concept comprehension, as well as the ability to search for specific formulas and assist with tasks. By downloading this application, you will be able to improve your academic skills in a simple and effective way. Terms of Use (EULA): https://formulaeapps.com/terms/ Privacy Policy: https://formulaeapps.com/privacidad/

About

Stoichiometric equations

Features
Read full description

Stoichiometric Equation balances chemical reaction equations for you — no trial and error, no guessing. Enter the reactants and the products, tap Balance equation, and the app returns the stoichiometric coefficients as the smallest set of whole numbers. Balancing an equation means making sure that the same number of atoms of every element appears on both sides. For a reaction such as 2Na + Cl₂ = 2NaCl you can still do that in your head. For e.g 3As₂S₃ + 28HNO₃ + 4H₂O = 6H₃AsO₄ + 9H₂SO₄ + 28NO, trial and error quickly stops being practical. That is exactly where this app takes over. HOW IT WORKS Instead of guessing, the app treats the equation the way a mathematician would: every unknown coefficient becomes a variable, the atom counts for each element become one linear equation, and the resulting system is solved with Gaussian elimination. The coefficient matrix is transformed into reduced row echelon form and the solution is scaled to the smallest whole-number coefficients. The complete derivation is included in the app, step by step, with a fully worked example — so you can not only get the answer, but also understand how it is found. FEATURES • Balances simple reactions and long, complex equations alike • Nested grouping with parentheses ( ), square brackets [ ] and braces { } • More than 90 chemical elements, written with the international IUPAC symbols • Results in the smallest whole-number coefficients • Clear, formatted output: proper subscripts, highlighted coefficients, monospaced layout • Long results are wrapped automatically to fit your screen • Precise error messages — unbalanced brackets, unknown element symbol, non-balanceable equation and more, each named instead of a vague "invalid input" • A collection of ready-made example equations: tap one and it is solved instantly • Built-in theory section explaining the mathematics behind the solver • German and English interface, chosen automatically from your device language • Optimised for iPhone and iPad, in portrait and landscape BUILT-IN EXAMPLES The app ships with examples ranging from textbook reactions to equations that would take a very long time by hand,

Screenshots

Formulae Pro4 screens
Stoichiometric equations3 screens

Verdict

The call

The clearest difference is price: Stoichiometric equations at Free against Formulae Pro's $1.99. Stoichiometric equations also leads on in-app purchases (none vs 3) and ads (none vs shown). Formulae Pro's advantage is update cadence (every 4 days vs every 3 months). On device support and iOS requirement 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

CostPrice · In-app purchases · Ads · Monetization

Stoichiometric equations is free to download; Formulae Pro costs $1.99 up front. Formulae Pro sells 3 in-app purchases, starting at $1.99 per 7 days. Stoichiometric equations asks for nothing beyond the download.

UpkeepUpdate frequency

Formulae Pro ships an update every 4 days, Stoichiometric equations every 3 months. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

Scorecard4 real differences · 4 level
Formulae Pro versus Stoichiometric equations: the parameters behind the verdict, then further details
ParameterFormulae ProStoichiometric equations
Price$1.99Free — better
Positive reviews100.0% of reviews—
Update frequencyEvery 4 days — betterEvery 3 months
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod, MaciPhone, iPad, iPod, Mac
Requires iOS15.015.0
Further details — not scored
Size46 MB17 MB
Age rating4+9+
DeveloperCAPDESIS S.A. DE C.V.Peter Sauer

In-app purchases

3 purchases

Formulae Pro

Subscriptions3
  • Formulae Pro Semanal$1.997 Days
  • Formulae Pro Mensual$5.991 Month
  • Formulae Pro Anual$59.991 Year
None

Stoichiometric equations

No in-app purchases

Questions

Is Formulae Pro free?
Formulae Pro costs $1.99, and also offers in-app purchases.
Is Stoichiometric equations free?
Stoichiometric equations is free to download, with no in-app purchases.
Do Formulae Pro or Stoichiometric equations have ads?
Formulae Pro shows ads; Stoichiometric equations does not.
Which is updated more often, Formulae Pro or Stoichiometric equations?
Formulae Pro ships an update every 4 days, and Stoichiometric equations every 3 months. Most recently, Formulae Pro was updated on October 24, 2026 and Stoichiometric equations on October 25, 2026.

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