# On High Alert vs Ship Maneuvering Simulator

The clearest difference is in-app purchases: Ship Maneuvering Simulator at none against On High Alert's 6. Ship Maneuvering Simulator also leads on update cadence (every 8 days vs every 2 weeks). On High Alert's advantage is iOS requirement (12.0 vs 15.0). On price, ads and device support there is nothing between them.

Both are free to download. On High Alert sells 6 one-off in-app purchases. Ship Maneuvering Simulator asks for nothing beyond the download.

On High Alert ships an update every 2 weeks, Ship Maneuvering Simulator every 8 days. The most recent releases landed on October 26, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | On High Alert | Ship Maneuvering Simulator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.3 (104 ratings)](https://appshunter.io/ios/app/ship-maneuvering-simulator/id6475722175/reviews)** |
| Number of ratings | — | **104** |
| Positive reviews | — | 85.9% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | Every 2 weeks | **Every 8 days** |
| Monetization | — | Ad-supported |
| Size | 157 MB | 390 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 9+ | 4+ |
| Developer | [Synthetic Mind AB](https://appshunter.io/developer/1256122836) | [WPC](https://appshunter.io/developer/1681830786) |

## What reviewers say

### On High Alert

[App page](https://appshunter.io/ios/app/on-high-alert/id1609630385)

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Handful of Gems | $0.99 | one-time |
| Pile of Gems | $3.99 | one-time |
| Pouch of Gems | $8.99 | one-time |
| Barrel of Gems | $22.99 | one-time |
| Chest of Gems | $54.99 | one-time |
| Vault of Gems | $109.99 | one-time |


### Ship Maneuvering Simulator

[App page](https://appshunter.io/ios/app/ship-maneuvering-simulator/id6475722175)

Pilot large vessels through challenging maritime scenarios. Experience realistic ship physics and handling in various missions, from navigating channels to berthing. Compete globally on leaderboards and unlock new ships as you progress.

**Highlights:** Realistic ship physics (MMG hydrodynamic model), Career mode with ranks and missions, 8 unique ships with distinct handling, Free play mode with custom settings, Weekly and all-time leaderboards, Detailed sound effects

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

**In-app purchases:** none


## Frequently asked questions

### Is On High Alert free?

On High Alert is free to download, with in-app purchases available.

### Is Ship Maneuvering Simulator free?

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

### Do On High Alert or Ship Maneuvering Simulator have ads?

Both On High Alert and Ship Maneuvering Simulator show ads.

### Which is updated more often, On High Alert or Ship Maneuvering Simulator?

On High Alert ships an update every 2 weeks, and Ship Maneuvering Simulator every 8 days. Most recently, On High Alert was updated on October 26, 2026 and Ship Maneuvering Simulator on October 30, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*