# ChemistryEquations vs General Chemistry Test Prep

The clearest difference is update cadence: ChemistryEquations at every 3 weeks against General Chemistry Test Prep's every 14 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. ChemistryEquations sells 1 one-off in-app purchase and General Chemistry Test Prep sells 9 in-app purchases, starting at $8.99 per 7 days. Whichever you choose, the download price is not the number that matters.

ChemistryEquations ships an update every 3 weeks, General Chemistry Test Prep every 14 months. The most recent releases landed on October 3, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | ChemistryEquations | General Chemistry Test Prep |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/general-chemistry-test-prep/id6744531345/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 14 months |
| Size | 13 MB | 53 MB |
| Requires iOS | 16.0 | **15.1** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Robert J Sarvis Jr](https://appshunter.io/developer/1531648349) | [YAUHEN BAHDANOVICH](https://appshunter.io/developer/1711932790) |

## What reviewers say

### ChemistryEquations

[App page](https://appshunter.io/ios/app/chemistryequations/id6738890420)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Advanced Equations | $0.99 | one-time |


### General Chemistry Test Prep

[App page](https://appshunter.io/ios/app/general-chemistry-test-prep/id6744531345)

**Features:** macOS Compatibility

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Chemistry Weekly Full Access | $8.99 | per 7 days |
| Chemistry Monthly Full Access | $24.99 | per month |
| ACS Monthly Full Access | $34.99 | per month |
| ACS Quarterly Full Access | $55.99 | per 3 months |
| ACS Quarterly Full Access | $59.99 | per 3 months |
| ACS Semiannual Full Access | $75.99 | per 6 months |
| ACS Semiannual Full Access | $79.99 | per 6 months |
| ACS Annual Full Access | $109.99 | per year |
| ACS Annual Full Access | $119.99 | per year |


## Frequently asked questions

### Is ChemistryEquations free?

ChemistryEquations is free to download, with in-app purchases available.

### Is General Chemistry Test Prep free?

General Chemistry Test Prep is free to download, with in-app purchases available.

### Do ChemistryEquations or General Chemistry Test Prep have ads?

Neither ChemistryEquations nor General Chemistry Test Prep shows ads.

### Which is updated more often, ChemistryEquations or General Chemistry Test Prep?

ChemistryEquations ships an update every 3 weeks, and General Chemistry Test Prep every 14 months. Most recently, ChemistryEquations was updated on October 3, 2026 and General Chemistry Test Prep on October 24, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*