# DrPhos' Stoichiometry — Stoichiometry Problem Solver > Chemistry stoichiometry problem solver for students, calculating moles and mass from balanced equations. (iPhone/iPad app by Monte L Helm.) - Source: https://appshunter.io/ios/app/drphos-stoichiometry/id6475633178 (this page in markdown: same URL + `.md`) - Developer: [Monte L Helm](https://appshunter.io/developer/1715082616) - Category: Education, Utilities - Price: $0.99 with in-app purchases - Rating: 5.00/5 from 1 App Store ratings - Age rating: 4+ - Requires: iOS 17.2 · 15 MB - Languages: English - Released: 2024-01-07 - Data updated: 2026-07-18 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/drphos-stoichiometry/id6475633178/reviews.md ## What is DrPhos' Stoichiometry? Solve Stoichiometry Problems Fast The DrPhos Stoichiometry Tool makes solving chemical reaction problems simple. Enter a balanced equation, choose known and unknown compounds, and instantly calculate moles and mass. Designed for chemistry students, this tool walks you through the stoichiometric process with clean visuals and intelligent logic. Whether you’re solving basic mole ratios or limiting reactant problems, this app keeps your work fast, accurate, and focused. Features: • Supports mole, mass, and volume conversions • Works with balanced chemical equations • Select known and unknown compounds easily • Built-in limiting reactant detection • Ideal for high school and college chemistry Use this app on its own or unlock it within the full DrPhos GenChem Helper suite to streamline your chemistry toolkit. ## Key features - Mole, mass, and volume conversions - Balanced chemical equation support - Compound selection - Limiting reactant detection - High school and college chemistry focus ## Pricing and in-app purchases Base price: $0.99. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Significant Figures Counter | $0.99 | one-time | | Science Calculator | $0.99 | one-time | | Quadratic Equation Solver | $0.99 | one-time | | Kinetics | $0.99 | one-time | | Molar Mass Calculator | $0.99 | one-time | | General Chemistry Naming | $0.99 | one-time | | Ionic Compound Builder | $0.99 | one-time | | Solution Concentrations | $0.99 | one-time | | Reaction Balancer | $0.99 | one-time | | pH Calculator | $0.99 | one-time | | Stoichiometry | $0.99 | one-time | ## Frequently asked questions about DrPhos' Stoichiometry ### What is DrPhos' Stoichiometry used for? DrPhos' Stoichiometry is designed to help students solve chemical reaction problems quickly and accurately. It assists with calculations involving moles, mass, and volume conversions based on balanced chemical equations. ### What types of stoichiometry problems can DrPhos' Stoichiometry solve? This tool can handle various stoichiometry problems, including basic mole ratios and limiting reactant calculations. It supports conversions for moles, mass, and volume, making it versatile for different problem types. ### Is DrPhos' Stoichiometry suitable for beginners? Yes, the app is ideal for high school and college chemistry students. It provides clean visuals and intelligent logic to walk users through the stoichiometric process, making it accessible for those learning the concepts. ### Does DrPhos' Stoichiometry work with any chemical equation? The app works with balanced chemical equations. Users need to input a correctly balanced equation to utilize the solver's full capabilities for accurate calculations. ### What devices does DrPhos' Stoichiometry support? DrPhos' Stoichiometry is available on iPhone and iPad devices, allowing students to solve problems on their preferred Apple mobile devices. ### How often is DrPhos' Stoichiometry updated? The app was last updated on July 31, 2025, indicating ongoing development and support. The latest version is 3.0. ### What is the price of DrPhos' Stoichiometry? DrPhos' Stoichiometry is a paid application, priced at $0.99. This one-time purchase grants access to its full functionality. ### Does DrPhos' Stoichiometry have ads? No, DrPhos' Stoichiometry does not contain advertisements. As a paid application, it offers an ad-free experience for users. ## Version history (last 5 releases) ### 3.0 — 2025-07-31 What’s New • Initial release of the Stoichiometry Tool • Supports mole, mass, and volume conversions • Added limiting reactant detection • Improved UI for selecting known and unknown compounds • Fast, accurate calculations with clean visual feedback ### 2.3.1 — 2024-10-17 Minor improvements and bug fixes. ### 2.3 — 2024-07-17 Bug fixes and updated graphics ### 2.2.2 — 2024-06-29 bug fixes added kinetics calculator ### 2.1 — 2024-06-25 Updated app to prevent crashes. Added Kinetics helper app. ## Apps similar to DrPhos' Stoichiometry | App | Rating | Price | Category | | --- | --- | --- | --- | | [CLEP Chemistry Prep](https://appshunter.io/ios/app/clep-chemistry-prep/id6744746926) | — | $1.99 | Education | | [Explayn: Learn Chemistry](https://appshunter.io/ios/app/explayn-learn-chemistry/id6448284993) | 4.2 (6) | Free | Education | | [Chemical-Equation-Balance](https://appshunter.io/ios/app/chemical-equation-balance/id1619656341) | — | Free | Education | | [Gas Law Calc](https://appshunter.io/ios/app/gas-law-calc/id6444635697) | 5.0 (4) | Free | Education | | [Illini Central CUSD 189](https://appshunter.io/ios/app/illini-central-cusd-189/id1459687275) | 3.7 (6) | Free | Education | | [Mole Concept in Chemistry](https://appshunter.io/ios/app/mole-concept-in-chemistry/id1187116572) | — | $0.99 | Education | ## More apps by Monte L Helm - [DrPhos' Molar Mass](https://appshunter.io/ios/app/drphos-molar-mass/id6471319631) - [Ionic Compound Builder](https://appshunter.io/ios/app/ionic-compound-builder/id6472619902) - [DrPhos' Ionic Compounds](https://appshunter.io/ios/app/drphos-ionic-compounds/id6473097401) - [DrPhos' Reaction Balancer](https://appshunter.io/ios/app/drphos-reaction-balancer/id6474077005) - [DrPhos' GenChem Naming](https://appshunter.io/ios/app/drphos-genchem-naming/id6476617346) All apps by Monte L Helm: https://appshunter.io/developer/1715082616 ## Related topics [stoichiometry](https://appshunter.io/ios/topics/stoichiometry) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-18.*