# Hydraulic schemes vs ECAP

The clearest difference is price: ECAP at Free against Hydraulic schemes's $0.99. ECAP also leads on update cadence (every 2 days vs every 2 weeks). Hydraulic schemes's advantage is iOS requirement (11.0 vs 15.0). On ads, in-app purchases and device support there is nothing between them.

ECAP is free to download; Hydraulic schemes costs $0.99 up front. Hydraulic schemes sells 1 one-off in-app purchase and ECAP sells 3 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Hydraulic schemes ships an update every 2 weeks, ECAP every 2 days. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Hydraulic schemes | ECAP |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/hydraulic-schemes/id1602894931/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 76.9% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 2 days** |
| Monetization | Free with in-app purchases | — |
| Size | 10 MB | 35 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Angel Martinez](https://appshunter.io/developer/1446956865) | [VEGARD HELLAND BU](https://appshunter.io/developer/6780784892) |

## What reviewers say

### Hydraulic schemes

[App page](https://appshunter.io/ios/app/hydraulic-schemes/id1602894931)

Easily design hydraulic, heating, cooling, and air conditioning schematics. Drag and drop symbols to quickly build your diagrams. Save and edit your work with the PRO version.

**Highlights:** Create hydraulic schemes, Drag and drop symbol placement, Extensive symbol library, Save and edit schemes (PRO), Export as image or PDF, Multiple HVAC system support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove ads, save/edit diagram | $3.99 | one-time |


### ECAP

[App page](https://appshunter.io/ios/app/ecap-electrical-docs/id6780784890)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ECAP Pro | $4.99 | per 7 days |
| ECAP Pro | $12.99 | per month |
| ECAP Pro | $89.99 | per year |


## Frequently asked questions

### Is Hydraulic schemes free?

Hydraulic schemes costs $0.99, and also offers in-app purchases.

### Is ECAP free?

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

### Do Hydraulic schemes or ECAP have ads?

Neither Hydraulic schemes nor ECAP shows ads.

### Which is updated more often, Hydraulic schemes or ECAP?

Hydraulic schemes ships an update every 2 weeks, and ECAP every 2 days. Most recently, Hydraulic schemes was updated on October 30, 2026 and ECAP on October 31, 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.*