# 911sms vs Drug Structures

The clearest difference is iOS requirement: 911sms at 15.6 against Drug Structures's 18.6. On price, update cadence, ads and in-app purchases there is nothing between them.

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

911sms ships an update every 11 months, Drug Structures every 14 months. The most recent releases landed on September 29, 2026 and September 16, 2026 respectively.

## The numbers

| Metric | 911sms | Drug Structures |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.7 (3 ratings)](https://appshunter.io/ios/app/drug-structures/id1207401347/reviews)** |
| Number of ratings | — | **3** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 11 months** | Every 14 months |
| Monetization | — | Free |
| Size | 21 MB | 3 MB |
| Requires iOS | **15.6** | 18.6 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 12+ | 12+ |
| Developer | [LifeGuard Global Inc.](https://appshunter.io/developer/1060701210) | [David Bourne](https://appshunter.io/developer/1031086386) |

## What reviewers say

### 911sms

[App page](https://appshunter.io/ios/app/911sms/id1181355084)

**Features:** macOS Compatibility

**In-app purchases:** none


### Drug Structures

[App page](https://appshunter.io/ios/app/drug-structures/id1207401347)

This game helps pharmacy and healthcare students practice identifying drug structures. It offers a focused learning experience for medical professionals in training.

**Highlights:** Identify drug structures, Practice for healthcare students, Targeted medical education, Free to play

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 911sms free?

911sms is free to download, with no in-app purchases.

### Is Drug Structures free?

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

### Do 911sms or Drug Structures have ads?

Neither 911sms nor Drug Structures shows ads.

### Which is updated more often, 911sms or Drug Structures?

911sms ships an update every 11 months, and Drug Structures every 14 months. Most recently, 911sms was updated on September 29, 2026 and Drug Structures on September 16, 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.*