Domestic Water Sizer vs Collins ASG Technical Request
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Domestic Water Sizer
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We are delighted to introduce the new version of our Domestic Water Sizer app! Designed for engineers, installers and professionals in the plumbing sector, this app will help you to correctly size domestic water systems easily and accurately. Functions: -Flow Rate Calculation: based on the number and type of devices used in domestic water systems. - Pressure Reducing Valves: set the operating parameters and the design flow rate to obtain the codes for the most suitable Caleffi components. - Mixing Valves: choose between thermostatic mixing valves, electronic mixing valves or valves for solar thermal systems and obtain the codes for the most suitable Caleffi components. - Hot Water Cylinder with Storage: estimate the hot water cylinder volume required for various user categories. - Expansion Vessels: calculate the expansion vessel required by entering the operating parameters and obtain single- or dual-vessel solutions. - Report Generation: at the end of the calculation and sizing process, you can download a detailed document containing all the specifications and sized components, plus links to documentation and an application diagram. Why Choose Us? Our app is designed to help you work more efficiently, by reducing errors and improving the accuracy of the calculation and sizing procedures used for domestic water systems. Download Domestic Water Sizer today to see what’s new! Download now and optimise your domestic water systems with ease!
Collins ASG Technical Request
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This app is specifically designed for the Advanced Structures business unit (Cage Code: 51563) and their Nacelle, EBU, and Tailcone products. This App will allow our Customers to easily search existing cases/requests and their status, Create new tech requests, and two-way communication with Collins Support Team. Customer will also receive a push notification when a new email, chat or status update is received. Technical requests for other business units should still be sent to crc@collins.com or your dedicated Collins field support representative.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Domestic Water Sizer | Collins ASG Technical Request |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 46 MB | 37 MB |
| Age rating | 4+ | 4+ |
| Developer | Caleffi S.p.A | Rockwell Collins, Inc. |
In-app purchases
Domestic Water Sizer
No in-app purchases
Collins ASG Technical Request
No in-app purchases
Questions
Is Domestic Water Sizer free?
Is Collins ASG Technical Request free?
Do Domestic Water Sizer or Collins ASG Technical Request have ads?
Which is updated more often, Domestic Water Sizer or Collins ASG Technical Request?
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