# Pen Dig vs Marine Engine ASMR

The clearest difference is rating: Pen Dig at 4.6 against Marine Engine ASMR's 4.0. Pen Dig also leads on ratings volume (3.6K vs 8) and review sentiment (11% vs 0%). Marine Engine ASMR's advantage is in-app purchases (none vs 1) and update cadence (every 2 weeks vs monthly). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Pen Dig sells 1 one-off in-app purchase. Marine Engine ASMR asks for nothing beyond the download.

Pen Dig holds the better App Store score, 4.6 against 4.0. That said, the two scores are not equally well evidenced: Pen Dig has 3.6K ratings behind it against 8, so its average is the more settled of the two. Written reviews point the same way: 11% of Pen Dig's written reviews are positive against 0% of Marine Engine ASMR's.

Pen Dig ships an update monthly, Marine Engine ASMR every 2 weeks. The most recent releases landed on October 19, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Pen Dig | Marine Engine ASMR |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (3.6K ratings)](https://appshunter.io/ios/app/pen-dig/id1669978113/reviews)** | [4.0 (8 ratings)](https://appshunter.io/ios/app/marine-engine-asmr/id1672280746/reviews) |
| Number of ratings | **3.6K** | 8 |
| Positive reviews | **11.3% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | Monthly | **Every 2 weeks** |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Size | 164 MB | 448 MB |
| Requires iOS | 11.0 | 11.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [DoDo Game Co](https://appshunter.io/developer/1604391608) | [GOODROID,Inc.](https://appshunter.io/developer/951688937) |

## What reviewers say

### Pen Dig

[App page](https://appshunter.io/ios/app/pen-dig/id1669978113)

Engage in a clicker idle game where you dig the ground with a pen to earn money. Upgrade your digging tools and use your earnings to construct a city, opening new areas and creating your own unique playstyle.

**Highlights:** Clicker idle gameplay, Earn coins by digging, Upgrade various pen tools, Build a city from mines, Create a personalized playstyle, Develop a prosperous city

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

**In-app purchases (1)**

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

**What reviewers like**

- 💡 Fun game concept
- 👍 Satisfying gameplay

**What reviewers complain about**

- 🤯 Overwhelming number of ads
- 🐛 Game-breaking bugs and glitches
- 🔒 Paid 'no ads' option doesn't work as expected

**Reported bugs**

- Pencil/drill stops collecting materials at certain depths
- Progress resets or gets stuck after reaching certain milestones
- Inability to progress past first city/area

**Requested features**

- More levels and content to extend gameplay
- Reduce frequency of ads
- Improve stability and fix bugs


### Marine Engine ASMR

[App page](https://appshunter.io/ios/app/marine-engine-asmr/id1672280746)

Compete in races by upgrading your engines to finish faster than opponents. Earn money to enhance your vehicle and achieve victory. This is a popular clicker game focused on speed and upgrades.

**Highlights:** Engine upgrades, Race to earn money, Faster progression, Competitive gameplay, Clicker mechanics

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

**In-app purchases:** none


## Frequently asked questions

### Is Pen Dig free?

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

### Is Marine Engine ASMR free?

Marine Engine ASMR is free to download, with no in-app purchases.

### Which has better reviews, Pen Dig or Marine Engine ASMR?

Pen Dig is rated higher. Pen Dig averages 4.6 out of 5 from 3.6K ratings, while Marine Engine ASMR averages 4.0 from 8 ratings.

### Do Pen Dig or Marine Engine ASMR have ads?

Both Pen Dig and Marine Engine ASMR show ads.

### Which is updated more often, Pen Dig or Marine Engine ASMR?

Pen Dig ships an update monthly, and Marine Engine ASMR every 2 weeks. Most recently, Pen Dig was updated on October 19, 2026 and Marine Engine ASMR 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.*