# Underline Quest vs MorseCAT

The clearest difference is in-app purchases: Underline Quest at none against MorseCAT's 1. MorseCAT's advantage is update cadence (every 2 weeks vs every 5 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. MorseCAT sells 1 one-off in-app purchase. Underline Quest asks for nothing beyond the download.

Underline Quest ships an update every 5 weeks, MorseCAT every 2 weeks. The most recent releases landed on September 25, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | Underline Quest | MorseCAT |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (9 ratings)](https://appshunter.io/ios/app/underline-quest/id6753770430/reviews)** | — |
| Number of ratings | **9** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 2 weeks** |
| Monetization | Free | — |
| Size | 458 MB | 37 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Virginia Utility Protection Service, Inc.](https://appshunter.io/developer/1690618023) | [Aspen Ventures, LLC](https://appshunter.io/developer/1479334231) |

## What reviewers say

### Underline Quest

[App page](https://appshunter.io/ios/app/underline-quest/id6753770430)

Embark on an interactive adventure to identify and resolve issues within critical infrastructure. Players use smart inspections to diagnose problems and implement real-world solutions.

**Highlights:** Interactive utility-repair adventure, Scan environments to detect faults, Diagnose critical infrastructure issues, Fix problems through smart inspections, Real-world problem-solving gameplay

**In-app purchases:** none


### MorseCAT

[App page](https://appshunter.io/ios/app/morsecat-morse-code-trainer/id6793568945)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| MorseCAT Pro | $4.99 | one-time |


## Frequently asked questions

### Is Underline Quest free?

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

### Is MorseCAT free?

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

### Do Underline Quest or MorseCAT have ads?

Neither Underline Quest nor MorseCAT shows ads.

### Which is updated more often, Underline Quest or MorseCAT?

Underline Quest ships an update every 5 weeks, and MorseCAT every 2 weeks. Most recently, Underline Quest was updated on September 25, 2026 and MorseCAT on September 18, 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.*