# Hydraulic Power Unit vs witNAV

The clearest difference is update cadence: witNAV at monthly against Hydraulic Power Unit's every 37 months. Hydraulic Power Unit's advantage is iOS requirement (6.0 vs 13.0.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Hydraulic Power Unit ships an update every 37 months, witNAV monthly. The most recent releases landed on November 1, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | Hydraulic Power Unit | witNAV |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 37 months | **Monthly** |
| Size | 4 MB | 9 MB |
| Requires iOS | **6.0** | 13.0.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Zanthic Automation Inc.](https://appshunter.io/developer/574695320) | [ADDERIT QUATRE AMICS SL](https://appshunter.io/developer/535859179) |

## What reviewers say

### Hydraulic Power Unit

[App page](https://appshunter.io/ios/app/hydraulic-power-unit/id608111471)

**Features:** macOS Compatibility

**In-app purchases:** none


### witNAV

[App page](https://appshunter.io/ios/app/witnav/id1201213461)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Hydraulic Power Unit free?

Hydraulic Power Unit is free to download, with no in-app purchases.

### Is witNAV free?

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

### Do Hydraulic Power Unit or witNAV have ads?

Neither Hydraulic Power Unit nor witNAV shows ads.

### Which is updated more often, Hydraulic Power Unit or witNAV?

Hydraulic Power Unit ships an update every 37 months, and witNAV monthly. Most recently, Hydraulic Power Unit was updated on November 1, 2026 and witNAV on October 26, 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.*