Stoichiometric equations vs SimpleTools
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Stoichiometric equations
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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,
SimpleTools
Instantly solve chemistry problems with AI-powered, step-by-step explanations. Snap a photo of any chemistry question and receive a clear, structured solution in seconds, helping students and parents understand problem-solving processes.
- AI-powered problem solving
- Photo scanning for problems
- Step-by-step explanations
- Supports various chemistry topics
- Unlimited scans with premium
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Solve chemistry problems instantly with AI-powered step-by-step explanations. Take a photo of any chemistry problem and get a clear, structured solution in seconds. Whether you’re a student preparing for exams or a parent helping with homework, SimpleTools: Chemistry Solver helps you understand how to solve problems — not just get answers. What you can solve: • Chemical equations and reactions • Stoichiometry problems • pH and acid-base calculations • Organic chemistry problems • Ionic equations • Chemical formulas and balancing • Laboratory and homework tasks How it works: 1. Take a photo of your chemistry problem 2. Our AI analyzes it 3. Receive a detailed step-by-step solution Free & Premium: Free users can solve only one problem per day. Premium subscription unlocks: • Unlimited AI-powered solutions • Unlimited scans • Full step-by-step explanations Subscriptions are available weekly and yearly. A free trial is available for new yearly subscribers. Subscription Terms: Payment will be charged to your Apple ID account at confirmation of purchase. Subscription automatically renews unless it is canceled at least 24 hours before the end of the current period. Terms of Use: https://simpletools-apps.com/terms Privacy Policy: https://simpletools-apps.com/privacy
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Verdict
The clearest difference is in-app purchases: Stoichiometric equations at none against SimpleTools's 2. Stoichiometric equations also leads on device support (4 vs 2) and iOS requirement (15.0 vs 17). SimpleTools's advantage is update cadence (weekly vs every 3 months). On price and ads 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. SimpleTools sells 2 in-app purchases, starting at $4.99 per 7 days. Stoichiometric equations asks for nothing beyond the download.
Stoichiometric equations ships an update every 3 months, SimpleTools weekly. The most recent releases landed on October 5, 2026 and October 19, 2026 respectively.
| Parameter | Stoichiometric equations | SimpleTools |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 1 — better |
| Update frequency | Every 3 months | Weekly — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Freemium |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone, iPad |
| Requires iOS | 15.0 — better | 17 |
| Further details — not scored | ||
| Size | 17 MB | 15 MB |
| Age rating | 9+ | 4+ |
| Developer | Peter Sauer | Yevhenii Kniaziev |
In-app purchases
Stoichiometric equations
No in-app purchases
SimpleTools
- Premium Weekly$4.997 Days
- Premium Yearly$29.991 Year
Questions
Is Stoichiometric equations free?
Is SimpleTools free?
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Which is updated more often, Stoichiometric equations or SimpleTools?
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