# KingDraw vs Molecular Model Simulator

The clearest difference is review sentiment: KingDraw at 59% against Molecular Model Simulator's 0%. KingDraw also leads on ads (none vs shown). Molecular Model Simulator's advantage is update cadence (every 10 days vs every 3 weeks). On price, in-app purchases, monetization model and device support there is nothing between them.

Both are free to download. KingDraw sells 8 in-app purchases, starting at $1.99 per month and Molecular Model Simulator sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

KingDraw ships an update every 3 weeks, Molecular Model Simulator every 10 days. The most recent releases landed on September 19, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | KingDraw | Molecular Model Simulator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.3 (58 ratings)](https://appshunter.io/ios/app/kingdraw/id1336806206/reviews)** | — |
| Number of ratings | **58** | — |
| Positive reviews | **58.8% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 weeks | **Every 10 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 187 MB | 84 MB |
| Requires iOS | 12.0 | **11.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Qingdao KingAgroot Precision Agriculture Technology Co., Ltd.](https://appshunter.io/developer/1452425595) | [博 彭](https://appshunter.io/developer/1293268076) |

## What reviewers say

### KingDraw

[App page](https://appshunter.io/ios/app/kingdraw/id1336806206)

This app is a professional tool for chemists to sketch molecules, reactions, and organic chemistry pathways. It offers advanced features like real-time 3D modeling and IUPAC name conversion, with multi-device synchronization and broad file format compatibility.

**Highlights:** Sketch molecules and reactions, Real-time 3D modeling, IUPAC name to structure conversion, Multi-terminal synchronization, Multi-format file saving, Intelligent gesture drawing

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

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| KingDrawVip-ContinuousMonthly | $1.99 | per month |
| KingDrawVip-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 |


### Molecular Model Simulator

[App page](https://appshunter.io/ios/app/molecular-model-simulator/id6459994670)

Visualize and interact with complex 3D molecular structures. Explore atomic arrangements, chemical bonds, and create custom compounds. Ideal for students, educators, and chemistry enthusiasts.

**Highlights:** Dynamic 3D molecular modeling, Interactive exploration (zoom, rotate, pan), Realistic atomic bonding visualization, Custom compound creation, Intuitive user interface, Educational and engaging content

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| UpgradeToPro | $0.99 | one-time |


## Frequently asked questions

### Is KingDraw free?

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

### Is Molecular Model Simulator free?

Molecular Model Simulator is free to download, with in-app purchases available.

### Do KingDraw or Molecular Model Simulator have ads?

Molecular Model Simulator shows ads; KingDraw does not.

### Which is updated more often, KingDraw or Molecular Model Simulator?

KingDraw ships an update every 3 weeks, and Molecular Model Simulator every 10 days. Most recently, KingDraw was updated on September 19, 2026 and Molecular Model Simulator on September 8, 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.*