# Marine Knots vs Learn COBOL Programming

The clearest difference is update cadence: Marine Knots at every 9 days against Learn COBOL Programming's every 20 months. Learn COBOL Programming's advantage is iOS requirement (13.0 vs 15.1). On price, ads, in-app purchases and device support there is nothing between them.

Marine Knots costs $1.99 and Learn COBOL Programming $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Marine Knots ships an update every 9 days, Learn COBOL Programming every 20 months. The most recent releases landed on September 28, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Marine Knots | Learn COBOL Programming |
| --- | --- | --- |
| Price | $1.99 | $1.99 |
| Rating | — | **[4.7 (3 ratings)](https://appshunter.io/ios/app/learn-cobol-programming/id6738732521/reviews)** |
| Number of ratings | — | **3** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 9 days** | Every 20 months |
| Monetization | — | Paid |
| Size | 31 MB | 35 MB |
| Requires iOS | 15.1 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | +4 |
| Developer | [Jerome De Watteville](https://appshunter.io/developer/1697193275) | [Muhammad Mubeen](https://appshunter.io/developer/1553722821) |

## What reviewers say

### Marine Knots

[App page](https://appshunter.io/ios/app/marine-knots/id6451214846)

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

**In-app purchases:** none


### Learn COBOL Programming

[App page](https://appshunter.io/ios/app/learn-cobol-programming/id6738732521)

Master COBOL programming from beginner to advanced levels with comprehensive tutorials, hands-on examples, and interactive quizzes. This app is designed for students, programmers, and professionals looking to understand this vital business language.

**Highlights:** Comprehensive tutorials, Syntax highlighting, Text-to-speech learning, Tips and tricks, Interview preparation, Bookmark key lessons

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

**In-app purchases:** none


## Frequently asked questions

### Is Marine Knots free?

Marine Knots costs $1.99, with no in-app purchases.

### Is Learn COBOL Programming free?

Learn COBOL Programming costs $1.99, with no in-app purchases.

### Do Marine Knots or Learn COBOL Programming have ads?

Neither Marine Knots nor Learn COBOL Programming shows ads.

### Which is updated more often, Marine Knots or Learn COBOL Programming?

Marine Knots ships an update every 9 days, and Learn COBOL Programming every 20 months. Most recently, Marine Knots was updated on September 28, 2026 and Learn COBOL Programming on October 9, 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.*