# SIRE 2.0 Prep vs Marine Engineer

The clearest difference is in-app purchases: SIRE 2.0 Prep at none against Marine Engineer's 6. Marine Engineer's advantage is update cadence (every 6 days vs every 6 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Marine Engineer sells 6 in-app purchases, starting at $0.99 per month. SIRE 2.0 Prep asks for nothing beyond the download.

SIRE 2.0 Prep ships an update every 6 weeks, Marine Engineer every 6 days. The most recent releases landed on October 10, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | SIRE 2.0 Prep | Marine Engineer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 6 days** |
| Size | 22 MB | 65 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 12+ |
| Developer | [Ceejo Thomas](https://appshunter.io/developer/1147475045) | [Oral Elmas](https://appshunter.io/developer/1896350657) |

## What reviewers say

### SIRE 2.0 Prep

[App page](https://appshunter.io/ios/app/sire-20-prep/id6478749472)

**Features:** macOS Compatibility

**In-app purchases:** none


### Marine Engineer

[App page](https://appshunter.io/ios/app/marine-engineer/id6809253477)

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| EngineRoom Pro - 3 Vessels | $0.99 | per month |
| EngineRoom Pro - 5 Vessels | $1.99 | per month |
| EngineRoom Pro - 10 Vessels | $2.99 | per month |
| EngineRoom Pro - 15 Vessels | $3.99 | per month |
| EngineRoom Pro - Unlimited | $5.99 | per month |
| ORB Part I – Lifetime Access | $24.99 | one-time |


## Frequently asked questions

### Is SIRE 2.0 Prep free?

SIRE 2.0 Prep is free to download, with no in-app purchases.

### Is Marine Engineer free?

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

### Do SIRE 2.0 Prep or Marine Engineer have ads?

Neither SIRE 2.0 Prep nor Marine Engineer shows ads.

### Which is updated more often, SIRE 2.0 Prep or Marine Engineer?

SIRE 2.0 Prep ships an update every 6 weeks, and Marine Engineer every 6 days. Most recently, SIRE 2.0 Prep was updated on October 10, 2026 and Marine Engineer on October 13, 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.*