# Hydraulic schemes vs Smartuli

The clearest difference is price: Smartuli at Free against Hydraulic schemes's $0.99. Smartuli also leads on in-app purchases (none vs 1). Hydraulic schemes's advantage is update cadence (every 2 weeks vs every 2 months) and iOS requirement (11.0 vs 15.1). On ads and device support there is nothing between them.

Smartuli is free to download; Hydraulic schemes costs $0.99 up front. Hydraulic schemes sells 1 one-off in-app purchase. Smartuli asks for nothing beyond the download.

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

## The numbers

| Metric | Hydraulic schemes | Smartuli |
| --- | --- | --- |
| 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 | **No** |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 2 months |
| Monetization | Free with in-app purchases | — |
| Size | 10 MB | 24 MB |
| Requires iOS | **11.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Angel Martinez](https://appshunter.io/developer/1446956865) | [Ilia Manizhashvili](https://appshunter.io/developer/1802681433) |

## 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 |


### Smartuli

[App page](https://appshunter.io/ios/app/smartuli/id6482978577)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Hydraulic schemes free?

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

### Is Smartuli free?

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

### Do Hydraulic schemes or Smartuli have ads?

Neither Hydraulic schemes nor Smartuli shows ads.

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

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