# IMCA Diving CPD vs Catenary Cables

The clearest difference is in-app purchases: IMCA Diving CPD at none against Catenary Cables's 2. IMCA Diving CPD also leads on iOS requirement (12.0 vs 16.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Catenary Cables sells 2 in-app purchases, starting at $59.99 per month. IMCA Diving CPD asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 2 months. Both last shipped on September 8, 2026.

## The numbers

| Metric | IMCA Diving CPD | Catenary Cables |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (6 ratings)](https://appshunter.io/ios/app/catenary-cables/id6447140970/reviews)** |
| Number of ratings | — | **6** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | **Free** | Subscription |
| Size | 36 MB | 31 MB |
| Requires iOS | **12.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [ACUIZEN TECHNOLOGIES SINGAPORE PTE. LTD.](https://appshunter.io/developer/1438003775) | [Logan Copenhaver](https://appshunter.io/developer/1680415210) |

## What reviewers say

### IMCA Diving CPD

[App page](https://appshunter.io/ios/app/imca-diving-cpd/id1473933142)

Stay current with the commercial diving sector through multimedia content and quizzes. This application offers diving supervisors the latest updates and knowledge to maintain their professional development.

**Highlights:** Latest commercial diving updates, Multimedia content modules, Knowledge retention quizzes, Professional development tracking, Supervisor-focused learning

**Features:** macOS Compatibility

**In-app purchases:** none


### Catenary Cables

[App page](https://appshunter.io/ios/app/catenary-cables/id6447140970)

This app provides a more accurate and efficient method for calculating the sagging of overhead transmission line conductors. It replaces traditional approximate parabolic equations with precise catenary expressions, saving time and improving accuracy.

**Highlights:** Accurate sag calculations, Precise catenary expressions, Replaces traditional methods, Flexible transit setup, Time-saving efficiency

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $59.99 | per month |
| Yearly | $539.99 | per year |


## Frequently asked questions

### Is IMCA Diving CPD free?

IMCA Diving CPD is free to download, with no in-app purchases.

### Is Catenary Cables free?

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

### Do IMCA Diving CPD or Catenary Cables have ads?

Neither IMCA Diving CPD nor Catenary Cables shows ads.

### Which is updated more often, IMCA Diving CPD or Catenary Cables?

IMCA Diving CPD ships an update every 2 months, and Catenary Cables every 2 months. Most recently, IMCA Diving CPD was updated on September 8, 2026 and Catenary Cables on September 8, 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.*