# ChemBench: Equation Balancer — Molar mass, pH, stoichiometry

> Molar mass, pH, stoichiometry (iPhone/iPad app by 献慧 陈.)

- Source: https://appshunter.io/ios/app/chembench-equation-balancer/id6813808389 (this page in markdown: same URL + `.md`)
- Developer: [献慧 陈](https://appshunter.io/developer/1896370005)
- Category: Education, Reference
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 16.0 · 8 MB
- Languages: Chinese (Simplified, China), German (Germany), Japanese, French (France), Chinese (Traditional, Taiwan), American English, European Spanish, Korean
- Released: 2026-09-24
- Data updated: 2026-10-12
- User reviews in markdown: https://appshunter.io/ios/app/chembench-equation-balancer/id6813808389/reviews.md

## What is ChemBench?

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.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Pro Lifetime | $4.99 | one-time |



## Version history (last 3 releases)

### 1.2 — 2026-10-10

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.

### 1.1 — 2026-10-07

Diese App wird von einem unabhängigen Entwickler entwickelt und gepflegt. Feedback und Fehlermeldungen sind jederzeit willkommen. Bei Kooperationsanfragen kontaktieren Sie mich bitte per E-Mail. Viel Freude mit der App.
E-Mail: yemaozi2026@outlook.com

157 Level in acht Fächern, darunter Redox, organische Strukturen, Gleichgewicht, Ionen und Kristalle. Neu: Tagesaufgabe, Kurse, 13 Rechenwerkzeuge mit Ladung und Masse bei der Schmelzflusselektrolyse, Offline-Teilen sowie PDF oder Druck für freigeschaltete Lösungen. Lösungen vor dem Lösen sind getrennt von Pro.

### 1.0 — 2026-09-24

No release notes.

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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 2026-10-12.*