# Domestic Water Sizer vs Techno System

The clearest difference is update cadence: Domestic Water Sizer at every 3 months against Techno System's every 19 months. 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.

Domestic Water Sizer ships an update every 3 months, Techno System every 19 months. Both last shipped on October 24, 2026.

## The numbers

| Metric | Domestic Water Sizer | Techno System |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 19 months |
| Monetization | — | Free |
| Size | 46 MB | 10 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Caleffi S.p.A](https://appshunter.io/developer/920722440) | [TNX srl](https://appshunter.io/developer/460967609) |

## What reviewers say

### Domestic Water Sizer

[App page](https://appshunter.io/ios/app/domestic-water-sizer/id972070226)

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

**In-app purchases:** none


### Techno System

[App page](https://appshunter.io/ios/app/techno-system/id1083928221)

This application assists users in identifying suitable plate heat exchangers for standard civilian uses. It also facilitates contact with technical support for industrial applications and helps locate nearby suppliers. Additional features include a unit converter and a comparison tool for exchangers.

**Highlights:** Identify heat exchangers for civilian applications, Contact tech support for industrial applications, Find closest supplier, Technical measurement unit conversion, Compare Techno System exchangers

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Domestic Water Sizer free?

Domestic Water Sizer is free to download, with no in-app purchases.

### Is Techno System free?

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

### Do Domestic Water Sizer or Techno System have ads?

Neither Domestic Water Sizer nor Techno System shows ads.

### Which is updated more often, Domestic Water Sizer or Techno System?

Domestic Water Sizer ships an update every 3 months, and Techno System every 19 months. Most recently, Domestic Water Sizer was updated on October 24, 2026 and Techno System on October 24, 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.*