DrPhos' pH Calculator
Master pH Problems Instantly
$0.99 · In‑App Purchases · Designed for iPad
Quickly calculate pH, pOH, [H⁺], and [OH⁻] for acids and bases. Enter concentration and instantly get results—perfect for chemistry students and exam prep.
Easily Calculate pH, pOH, [H⁺], and [OH⁻]
The DrPhos pH Calculator is a fast, reliable tool for solving acid-base problems in general chemistry. It supports both strong and weak acids and bases—automatically solving equilibrium expressions using the appropriate Ka or Kb values.
Whether you’re converting between pH and concentration, calculating [H⁺], or just checking your work, this app provides accurate, instant results.
Features:
• Calculate pH, pOH, [H⁺], or [OH⁻] from any one value
• Handles strong and weak acids/bases with Ka or Kb
• Built-in support for molarity and scientific notation
• Maintains pH + pOH = 14 automatically
• Clean, focused layout with visual feedback
Need more chemistry tools?
Unlock additional features within the app or explore the full DrPhos GenChem Helper, which includes:
• Significant Figures Counter
• Molar Mass Calculator
• Ionic Compound Builder
• General Chemistry Naming Tool
• Equation Balancer
• Stoichiometry Solver
• Solution Concentration Calculator
• Integrated Rate Law Calculator
• Scientific Calculator
• Quadratic Equation Solver
Unlock individual tools for $0.99 each—or get everything in the full GenChem Helper for just $9.99.
Ratings & Reviews
• Now supports weak acid and base calculations using Ka and Kb
• Improved UI for entering concentrations and switching between inputs
• Added visual feedback for calculated values
• Bug fixes and performance improvements for smoother operation
The developer, Monte L Helm, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Monte L Helm
- Size
- 15.8 MB
- Category
- Education
- Compatibility
Requires iOS 17.2 or later.
- iPhone
Requires iOS 17.2 or later. - iPad
Requires iPadOS 17.2 or later. - Mac
Requires macOS 14.2 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.1 or later.
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Significant Figures Calculator $0.99
- Quadratic Equation Solver $0.99
- Science Calculator $0.99
- Kinetics Calculator $0.99
- Reaction Balancer $0.99
- Solution Concentrations $0.99
- General Chemistry Naming $0.99
- Ionic Compound Builder $0.99
- pH Calculator $0.99
- Stoichiometry $0.99
- Copyright
- © Dr. Phosphorus Presents