Stoichiometry vs Atom Structure
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
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.
- Balance chemical reactions
- Calculate molar masses
- Determine moles and actual masses
- Identify limiting reagents
- Supports various formula formats
- Integrates with Gas Phase Stoichiometry app
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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) β 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 donβt 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.
Atom Structure
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Explore the fascinating structure of atoms and electron distribution with interactive learning! βThe Structure of an Atom (Electron Distribution) by EduTech Eraβ helps students understand how electrons are arranged around the nucleus and how this arrangement influences chemical behavior. With clear visuals, step-by-step explanations, and interactive examples, this app makes learning atomic structure simple and engaging. Features: - Detailed explanation of atomic structure and electron shells - Interactive visuals to explore electron distribution - Simple, student-friendly language for all learning levels - Real-life examples to connect concepts with chemistry - Zoom, rotate, and explore diagrams for better clarity - Works fully offline - no internet required - Ideal for school students, teachers, and self-learners Whether you're studying chemistry for exams or just curious about atoms, this app provides a complete and engaging way to understand the fundamentals of atomic structure and electron arrangement. Download now and explore the building blocks of matter!
Screenshots
Verdict
The clearest difference is update cadence: Stoichiometry at every 2 months against Atom Structure's every 41 months. Atom Structure's advantage is price ($1.99 vs $2.99) and iOS requirement (12.0 vs 17.1). On 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
Stoichiometry costs $2.99 and Atom Structure $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Stoichiometry ships an update every 2 months, Atom Structure every 41 months. The most recent releases landed on September 7, 2026 and September 10, 2026 respectively.
| Parameter | Stoichiometry | Atom Structure |
|---|---|---|
| Price | $2.99 | $1.99 β better |
| Positive reviews | 50.0% of reviews | β |
| Update frequency | Every 2 months β better | Every 41 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | β |
| Devices | iPhone, iPad | iPhone, iPad, iPod β better |
| Requires iOS | 17.1 | 12.0 β better |
| Further details β not scored | ||
| Size | 1 MB | 232 MB |
| Age rating | 4+ | 4+ |
| Developer | Roman Volinsky | VIRTUAL FILAMENTS PRIVATE LIMITED |
In-app purchases
Stoichiometry
No in-app purchases
Atom Structure
No in-app purchases
Questions
Is Stoichiometry free?
Is Atom Structure free?
Do Stoichiometry or Atom Structure have ads?
Which is updated more often, Stoichiometry or Atom Structure?
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