# DrPhos' Chemistry Pro — Stoichiometry, pH & Molar Mass

> All-in-one chemistry calculator and problem-solving toolkit for students. (iPhone/iPad app by Monte L Helm.)

- Source: https://appshunter.io/ios/app/drphos-chemistry-pro/id6477353606 (this page in markdown: same URL + `.md`)
- Developer: [Monte L Helm](https://appshunter.io/developer/1715082616)
- Category: Education, Utilities
- Price: $4.99
- Rating: 5.00/5 from 6 App Store ratings · 2 written reviews indexed
- Age rating: 4+
- Requires: iOS 17.2 · 15 MB
- Languages: American English
- Released: 2024-02-05
- Data updated: 2026-08-19
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/drphos-chemistry-pro/id6477353606/reviews.md

## What is DrPhos' Chemistry Pro?

DrPhos' Chemistry Pro brings a practical collection of general chemistry calculators together in one focused app.

Balance chemical equations and solve stoichiometry problems. Calculate kinetics and half-lives, solution concentrations, pH and buffers, molar mass, significant figures, quadratic equations, ionic compounds, and chemical names.

Included tools:

• Reaction Solver with balancing and stoichiometry
• Kinetics and half-life calculations
• Solution concentration calculations
• pH calculations, including buffers
• Molar mass and elemental analysis
• Scientific calculations and significant figures
• Quadratic equations
• Ionic compound building and chemical naming

Every tool is included with purchase. No account or internet connection is required, and the app works offline.

Clear inputs, validation messages, adjustable precision, formatted chemistry notation, and draft persistence help make calculations easier to enter and review.

DrPhos' Chemistry Pro is designed for chemistry education and study. It is not a substitute for professional laboratory, medical, or safety guidance. Follow your instructor's conventions and verify critical work independently.

## Key features

- Science Calculator with sig fig control
- Molar Mass Calculator
- Equation Balancer
- Stoichiometry Solver
- pH Calculator
- Offline Support

## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/drphos-chemistry-pro/id6477353606/reviews.md

### 5/5 — Great app!

*2024-06-18*

Perfect for intro chem students!

### 5/5 — The best!

*2024-03-06*

This has helped me in my chemistry classes a lot! Definitely worth it and I highly recommend for students.

## Frequently asked questions about DrPhos' Chemistry Pro

### What is DrPhos' Chemistry Pro?

DrPhos' Chemistry Pro is a comprehensive chemistry calculator and problem-solving toolkit designed to help students master chemistry concepts. It offers a wide range of tools for calculations and balancing equations.

### What chemistry topics does DrPhos' Chemistry Pro cover?

DrPhos' Chemistry Pro covers topics such as stoichiometry, pH calculations, molar mass, rate laws, concentration, and balancing chemical reactions. It also includes tools for generating names and formulas and building ionic compounds.

### Can I use DrPhos' Chemistry Pro offline?

Yes, DrPhos' Chemistry Pro offers full offline support, allowing you to use its features anywhere, anytime without an internet connection.

### What devices is DrPhos' Chemistry Pro available on?

DrPhos' Chemistry Pro is available for iPhone and iPad devices.

### How much does DrPhos' Chemistry Pro cost?

DrPhos' Chemistry Pro is a paid application, priced at $4.99. There are no in-app purchases or advertisements.

### What is the age rating for DrPhos' Chemistry Pro?

DrPhos' Chemistry Pro has an age rating of 4+, making it suitable for a wide range of users.

### How often is DrPhos' Chemistry Pro updated?

The latest version of DrPhos' Chemistry Pro was released on 2025-07-28, indicating active development and updates.

### Does DrPhos' Chemistry Pro have ads?

No, DrPhos' Chemistry Pro is ad-free. It is a paid application that provides a clean and uninterrupted user experience.

## Version history (last 5 releases)

### 4.0.1 — 2026-08-11

Improved the Science Calculator clear key: C now cancels a pending operation while preserving the current number, and AC resets the calculator. Includes accessibility and reliability improvements.

### 4.0 — 2026-07-16

Version 4.0 substantially modernizes DrPhos' Chemistry Pro:

• Reorganized chemistry tools into clear categories
• Unified reaction balancing and stoichiometry workflows
• Refreshed kinetics, solution concentration, pH, and buffer tools
• Improved calculator layouts, numeric formatting, and validation
• Improved draft persistence, accessibility, and device layouts
• Reliability improvements throughout

### 3.0 — 2025-07-28

• Added Science Calculator with significant figure rounding and multiple display formats
• Improved Solutions Calculator layout and usability
• Enhanced Stoichiometry View with custom formula entry
• UI refinements and performance improvements
• Bug fixes for smoother input and decimal handling

### 2.5.1 — 2025-02-26

Added the custom toolbar to the decimal pad in the quadratic equation solver.

### 2.5 — 2025-02-26

Added a calculator with scientific notation display and basic functions.

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## 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' Stoichiometry](https://appshunter.io/ios/app/drphos-stoichiometry/id6475633178)
- [DrPhos' GenChem Naming](https://appshunter.io/ios/app/drphos-genchem-naming/id6476617346)

All apps by Monte L Helm: https://appshunter.io/developer/1715082616

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*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 2026-08-19.*