# Hydrostation vs DID

The clearest difference is device support: DID at 3 against Hydrostation's 1. DID also leads on iOS requirement (14.0 vs 16.0). 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.

Hydrostation ships an update every 3 months, DID every 6 months. The most recent releases landed on September 10, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | Hydrostation | DID |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 6 months |
| Size | 2 MB | 1 MB |
| Requires iOS | 16.0 | **14.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Ebara Pumps Europe S.p.A.](https://appshunter.io/developer/1736991874) | [Delattre Industrie Développement](https://appshunter.io/developer/1816216129) |

## What reviewers say

### Hydrostation

[App page](https://appshunter.io/ios/app/hydrostation/id6479708636)

**In-app purchases:** none


### DID

[App page](https://appshunter.io/ios/app/did-brumisation/id6746334766)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Hydrostation free?

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

### Is DID free?

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

### Do Hydrostation or DID have ads?

Neither Hydrostation nor DID shows ads.

### Which is updated more often, Hydrostation or DID?

Hydrostation ships an update every 3 months, and DID every 6 months. Most recently, Hydrostation was updated on September 10, 2026 and DID on September 23, 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.*