# VN vs ChemForge 9

The clearest difference is update cadence: ChemForge 9 at fortnightly against VN's every 2 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

VN ships an update every 2 months, ChemForge 9 fortnightly. The most recent releases landed on September 13, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | VN | ChemForge 9 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Fortnightly** |
| Size | 22 MB | 31 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Dung Do Tri](https://appshunter.io/developer/1861127929) | [Phuong Ma Thi](https://appshunter.io/developer/1871886299) |

## What reviewers say

### VN

[App page](https://appshunter.io/ios/app/vn-physics-7/id6756649299)

**Features:** macOS Compatibility

**In-app purchases:** none


### ChemForge 9

[App page](https://appshunter.io/ios/app/chemforge-9/id6758269568)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is VN free?

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

### Is ChemForge 9 free?

ChemForge 9 is free to download, with no in-app purchases.

### Do VN or ChemForge 9 have ads?

Neither VN nor ChemForge 9 shows ads.

### Which is updated more often, VN or ChemForge 9?

VN ships an update every 2 months, and ChemForge 9 fortnightly. Most recently, VN was updated on September 13, 2026 and ChemForge 9 on September 22, 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.*