# e vs Engine Room Simulator

The clearest difference is in-app purchases: e at none against Engine Room Simulator's 2. e also leads on iOS requirement (12.3 vs 16.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Engine Room Simulator sells 2 in-app purchases, starting at $9.99 per year. e asks for nothing beyond the download.

e ships an update every 10 days, Engine Room Simulator every 3 weeks. The most recent releases landed on September 9, 2026 and September 6, 2026 respectively.

## The numbers

| Metric | e | Engine Room Simulator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.8 (4 ratings)](https://appshunter.io/ios/app/engine-room-simulator-ers/id6767850469/reviews)** |
| Number of ratings | — | **4** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 10 days** | Every 3 weeks |
| Monetization | — | Free with in-app purchases |
| Size | 58 MB | 174 MB |
| Requires iOS | **12.3** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [ELOSOFT INC](https://appshunter.io/developer/1582738042) | [Louie Juera](https://appshunter.io/developer/1638500957) |

## What reviewers say

### e

[App page](https://appshunter.io/ios/app/e-trb/id6458732896)

**Features:** macOS Compatibility

**In-app purchases:** none


### Engine Room Simulator

[App page](https://appshunter.io/ios/app/engine-room-simulator-ers/id6767850469)

This app offers a high-fidelity simulation for marine engineering training. It allows users to practice shipboard engine-room procedures, from safety training to full voyage simulation, with clear guidance and feedback. Ideal for cadets, students, and seafarers to build practical skills anytime, anywhere.

**Highlights:** High-fidelity marine engineering simulation, PPE safety training and induction, Generator synchronization and startup, Full voyage simulation, Guided and assessment learning modes, Offline practice capability

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ERS Pro Yearly | $9.99 | per year |
| ERS Pro Lifetime | $19.99 | one-time |


## Frequently asked questions

### Is e free?

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

### Is Engine Room Simulator free?

Engine Room Simulator is free to download, with in-app purchases available.

### Do e or Engine Room Simulator have ads?

Neither e nor Engine Room Simulator shows ads.

### Which is updated more often, e or Engine Room Simulator?

e ships an update every 10 days, and Engine Room Simulator every 3 weeks. Most recently, e was updated on September 9, 2026 and Engine Room Simulator on September 6, 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.*