ChemBench: Equation Balancer
Molar mass, pH, stoichiometry
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
157 levels in eight subjects. Calculate before checking the result. Daily challenges, review and custom problems. Pro and answer passes are separate purchases.
ChemBench turns chemistry into interactive reasoning. Adjust conditions, build structures and enter calculation evidence before checking your conclusion. Compare reagents and calculate yield; predict gas quantities and partial pressures; compose reactions and calculate signed enthalpy changes. Key readings appear after the corresponding calculations pass.
EIGHT SUBJECTS, 157 LEVELS
Stoichiometry, solutions and acids/bases, gases and thermochemistry, redox and electrochemistry, organic structures, equilibrium, ions and precipitation, molecules and crystals. 63 levels are free; 94 require Pro. Each subject includes Intro, Core and Brainer difficulties.
PRACTICE AND EXPLORE
• A free daily challenge, including rotating questions drawn from Pro levels
• Courses, a review queue and subject learning records; assisted and independent solves are recorded separately
• Reaction Cards explain the laws using the current problem's values
• 13 quick tools, including molar mass, balancing, half-reactions, equilibrium constants, ionic coexistence and solubility curves; unlimited results and non-consumable hints
• Periodic trends and comparisons, 3D crystal models, packing calculations and linked concepts
• iPad split layouts and handwritten scratch work; resume unfinished problems
PRO — ONE-TIME PURCHASE
All 157 levels, full post-solve Reaction Card derivations, quick-tool working, configurable saved experiments, and custom problem creation with offline export. Change equations, solution conditions or gas-mixture components and check a new calculation.
ANSWER PASSES — SEPARATE ONE-TIME PURCHASES
Full worked answers before solving official levels are sold separately in Intro, Core and Brainer tiers. They are not included in Pro. Reading an answer marks the solve as assisted. Answers for authored or imported problems are free. Exchange offline problem codes or files through system sharing; recipients can play imported problems for free.
PRIVACY AND MODELS
Problems, calculations and local records work offline. No ads or analytics SDK. Each teaching model has stated limits, such as ideal gases, concentration-based acid/base calculations at 25°C and Hess reactions with specified physical states. See the in-app model notes. This is a calculation and reasoning tool; it contains no laboratory procedures and promises no exam-score gains.
Support, Privacy Policy and Terms of Use are in Settings.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
This app is independently developed and maintained by an indie developer. Feedback and bug reports are always welcome. For collaboration inquiries, please contact me by email. Enjoy the app.
Email: yemaozi2026@outlook.com
New Daily challenge home screen widget in small and medium sizes: today’s free question and your unaided coverage across eight subjects. Tap to start. A level is scored only after it is saved; if saving fails, the bench stays open so you can retry. Clearer notices for saved work and widget updates.
The developer, 献慧 陈, 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
- 献慧 陈
- Size
- 8.2 MB
- Category
- Education
- Compatibility
Requires iOS 16.0 or later.
- iPhone
Requires iOS 16.0 or later. - iPad
Requires iPadOS 16.0 or later. - Mac
Requires macOS 13.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
English and 7 more
- English, French, German, Japanese, Korean, Simplified Chinese, Spanish, Traditional Chinese
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Pro Lifetime $4.99
- Brainer Answers $2.99
- Core Answers $1.99
- Intro Answers $0.99
- Copyright
- © 2026 ye maozi
