# Domestic Water Sizer vs Collins ASG Technical Request

The clearest difference is iOS requirement: Domestic Water Sizer at 13.0 against Collins ASG Technical Request's 15.6. 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.

Domestic Water Sizer ships an update every 3 months, Collins ASG Technical Request every 2 months. The most recent releases landed on November 6, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | Domestic Water Sizer | Collins ASG Technical Request |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 months** |
| Size | 46 MB | 37 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Caleffi S.p.A](https://appshunter.io/developer/920722440) | [Rockwell Collins, Inc.](https://appshunter.io/developer/379086069) |

## 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


### Collins ASG Technical Request

[App page](https://appshunter.io/ios/app/collins-asg-technical-request/id6499199184)

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

**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 Collins ASG Technical Request free?

Collins ASG Technical Request is free to download, with no in-app purchases.

### Do Domestic Water Sizer or Collins ASG Technical Request have ads?

Neither Domestic Water Sizer nor Collins ASG Technical Request shows ads.

### Which is updated more often, Domestic Water Sizer or Collins ASG Technical Request?

Domestic Water Sizer ships an update every 3 months, and Collins ASG Technical Request every 2 months. Most recently, Domestic Water Sizer was updated on November 6, 2026 and Collins ASG Technical Request on November 4, 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.*