# ECOunit vs ChemBench

The clearest difference is in-app purchases: ECOunit at none against ChemBench's 4. ChemBench's advantage is update cadence (every 6 days vs monthly) and iOS requirement (16.0 vs 18.0). On price, ads and device support there is nothing between them.

Both are free to download. ChemBench sells 4 one-off in-app purchases. ECOunit asks for nothing beyond the download.

ECOunit ships an update monthly, ChemBench every 6 days. The most recent releases landed on October 25, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | ECOunit | ChemBench |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 6 days** |
| Size | 9 MB | 8 MB |
| Requires iOS | 18.0 | **16.0** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [ESC](https://appshunter.io/developer/1884401181) | [献慧 陈](https://appshunter.io/developer/1896370005) |

## What reviewers say

### ECOunit

[App page](https://appshunter.io/ios/app/ecounit/id6760427718)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### ChemBench

[App page](https://appshunter.io/ios/app/chembench-equation-balancer/id6813808389)

**Features:** macOS Compatibility, Family Sharing, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Intro Answers | $0.99 | one-time |
| Core Answers | $1.99 | one-time |
| Brainer Answers | $2.99 | one-time |
| Pro Lifetime | $4.99 | one-time |


## Frequently asked questions

### Is ECOunit free?

ECOunit is free to download, with no in-app purchases.

### Is ChemBench free?

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

### Do ECOunit or ChemBench have ads?

Neither ECOunit nor ChemBench shows ads.

### Which is updated more often, ECOunit or ChemBench?

ECOunit ships an update monthly, and ChemBench every 6 days. Most recently, ECOunit was updated on October 25, 2026 and ChemBench on October 31, 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.*