# Explore Intrepid vs Solitary Number

The clearest difference is in-app purchases: Explore Intrepid at none against Solitary Number's 1. Explore Intrepid also leads on ads (none vs shown) and iOS requirement (12.0 vs 15.1). On price and device support there is nothing between them.

Both are free to download. Solitary Number sells 1 one-off in-app purchase. Explore Intrepid asks for nothing beyond the download.

## The numbers

| Metric | Explore Intrepid | Solitary Number |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/explore-intrepid-engineering/id6751860705/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Monetization | Free | — |
| Size | 1.9 GB | 40 MB |
| Requires iOS | **12.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 9+ | 4+ |
| Developer | [Intrepid Museum](https://appshunter.io/developer/891318460) | [TATSUYA TAGUCHI](https://appshunter.io/developer/1886335141) |

## What reviewers say

### Explore Intrepid

[App page](https://appshunter.io/ios/app/explore-intrepid-engineering/id6751860705)

Step aboard a historic aircraft carrier and manage its complex engineering systems. Experience immersive simulations of the navigation bridge and engine rooms. Learn about naval history through interactive job training and historical accounts.

**Highlights:** Simulate aircraft carrier propulsion plant, Navigate navigation bridge and engine rooms, Story mode with mission objectives, Explore mode for self-paced learning, Interactive job training, Access historical images and accounts, Screen-reader friendly and accessible controls

**Features:** macOS Compatibility

**In-app purchases:** none


### Solitary Number

[App page](https://appshunter.io/ios/app/solitary-number/id6773939414)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $2.99 | one-time |


## Frequently asked questions

### Is Explore Intrepid free?

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

### Is Solitary Number free?

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

### Do Explore Intrepid or Solitary Number have ads?

Solitary Number shows ads; Explore Intrepid does not.

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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.*