# Hydro Pro App vs 5dkey

The clearest difference is iOS requirement: Hydro Pro App at 13.4 against 5dkey's 15.0. On price, update cadence, ads and in-app purchases there is nothing between them.

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

Hydro Pro App ships an update every 2 months, 5dkey every 3 months. The most recent releases landed on September 28, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Hydro Pro App | 5dkey |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 3 months |
| Size | 21 MB | 79 MB |
| Requires iOS | **13.4** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [The Testing Agency LLC](https://appshunter.io/developer/1700427350) | [Sitepics.app Pty Ltd](https://appshunter.io/developer/1470026369) |

## What reviewers say

### Hydro Pro App

[App page](https://appshunter.io/ios/app/hydro-pro-app/id6456410800)

**Features:** macOS Compatibility

**In-app purchases:** none


### 5dkey

[App page](https://appshunter.io/ios/app/5dkey/id6463869995)

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


## Frequently asked questions

### Is Hydro Pro App free?

Hydro Pro App is free to download, with no in-app purchases.

### Is 5dkey free?

5dkey is free to download, with no in-app purchases.

### Do Hydro Pro App or 5dkey have ads?

Neither Hydro Pro App nor 5dkey shows ads.

### Which is updated more often, Hydro Pro App or 5dkey?

Hydro Pro App ships an update every 2 months, and 5dkey every 3 months. Most recently, Hydro Pro App was updated on September 28, 2026 and 5dkey on October 10, 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.*