# KingDrawHD vs Molecule Simulator

The clearest difference is in-app purchases: Molecule Simulator at none against KingDrawHD's 9. Molecule Simulator also leads on review sentiment (100% vs 73%) and device support (3 vs 1). KingDrawHD's advantage is update cadence (monthly vs every 4 months) and iOS requirement (12.0 vs 15.0). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. KingDrawHD sells 8 in-app purchases, starting at $1.99 per month. Molecule Simulator asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.2 for KingDrawHD against 4.3 for Molecule Simulator. Both are backed by a comparable volume of ratings — 10 and 24 respectively. Written reviews are what separate them: 73% of KingDrawHD's written reviews are positive against 100% of Molecule Simulator's.

KingDrawHD ships an update monthly, Molecule Simulator every 4 months. The most recent releases landed on September 9, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | KingDrawHD | Molecule Simulator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.2 (10 ratings)](https://appshunter.io/ios/app/kingdrawhd/id1535782391/reviews) | **[4.3 (24 ratings)](https://appshunter.io/ios/app/molecule-simulator/id1538249996/reviews)** |
| Number of ratings | 10 | **24** |
| Positive reviews | 73.3% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Monthly** | Every 4 months |
| Monetization | Freemium | **Free** |
| Size | 170 MB | 8 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Qingdao KingAgroot Precision Agriculture Technology Co., Ltd.](https://appshunter.io/developer/1452425595) | [仕清 刘](https://appshunter.io/developer/1531464103) |

## What reviewers say

### KingDrawHD

[App page](https://appshunter.io/ios/app/kingdrawhd/id1535782391)

This app is a professional chemical drawing editor for sketching molecules, reactions, and organic chemistry pathways. It offers features like real-time 3D modeling, IUPAC name conversion, and intelligent gesture drawing. The app supports multi-terminal synchronization and saving files in various common chemical drawing formats.

**Highlights:** Real-time 3D modeling, IUPAC name to structure conversion, Structural formula searching, Intelligent gesture drawing, Multi-terminal synchronization, Multi-format file saving

**Features:** macOS Compatibility

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| KingDrawVip-ContinuousMonthly | $1.99 | per month |
| KingDrawHD-ContinuousMonthly | $9.99 | per month |
| KingDraw一天会员 | $0.99 | one-time |
| KingDraw一个月会员 | $2.99 | one-time |
| Monthly Member | $9.99 | one-time |
| Monthly Member | $11.99 | one-time |
| KingDraw一年会员 | $14.99 | one-time |
| Annual Member | $99.99 | one-time |


### Molecule Simulator

[App page](https://appshunter.io/ios/app/molecule-simulator/id1538249996)

Visualize the 3D structures of molecules using data from PubChem and Protein Data Bank. Explore molecules in various viewing modes and download an extensive library of compounds.

**Highlights:** 3D molecular visualization, Space filling mode, Ball-and-stick mode, Data from PubChem, Data from Protein Data Bank, Downloadable molecule library

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is KingDrawHD free?

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

### Is Molecule Simulator free?

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

### Which has better reviews, KingDrawHD or Molecule Simulator?

Molecule Simulator is rated higher. KingDrawHD averages 4.2 out of 5 from 10 ratings, while Molecule Simulator averages 4.3 from 24 ratings.

### Do KingDrawHD or Molecule Simulator have ads?

Neither KingDrawHD nor Molecule Simulator shows ads.

### Which is updated more often, KingDrawHD or Molecule Simulator?

KingDrawHD ships an update monthly, and Molecule Simulator every 4 months. Most recently, KingDrawHD was updated on September 9, 2026 and Molecule Simulator on September 21, 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.*