# Catenary Cables vs HydroSewer

The clearest difference is update cadence: HydroSewer at every 3 weeks against Catenary Cables's every 2 months. On price, ads, in-app purchases 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 and HydroSewer sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Catenary Cables ships an update every 2 months, HydroSewer every 3 weeks. The most recent releases landed on November 3, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Catenary Cables | HydroSewer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (7 ratings)](https://appshunter.io/ios/app/catenary-cables/id6447140970/reviews)** | — |
| Number of ratings | **7** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | Subscription | — |
| Size | 31 MB | 51 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Logan Copenhaver](https://appshunter.io/developer/1680415210) | [Transparent Blue Water LLC](https://appshunter.io/developer/1847968351) |

## What reviewers say

### 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 |


### HydroSewer

[App page](https://appshunter.io/ios/app/hydrosewer-drainage-network/id6754671899)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| HydroSewer Pro | $14.99 | one-time |


## Frequently asked questions

### Is Catenary Cables free?

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

### Is HydroSewer free?

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

### Do Catenary Cables or HydroSewer have ads?

Neither Catenary Cables nor HydroSewer shows ads.

### Which is updated more often, Catenary Cables or HydroSewer?

Catenary Cables ships an update every 2 months, and HydroSewer every 3 weeks. Most recently, Catenary Cables was updated on November 3, 2026 and HydroSewer on November 5, 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.*