Caleffi Pipe Sizer vs Si
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Caleffi Pipe Sizer
This application assists hydraulic and HVAC professionals in accurately sizing water or air pipes. It calculates pressure drops and offers a modern, intuitive interface for precise system design on the go.
- Accurate water/air pipe sizing
- Pressure drop calculation
- Customizable technical parameter calculations
- Extensive material and configuration library
- Modern and intuitive interface
- Enhanced performance
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Caleffi Pipe Sizer is the essential app for engineers, designers and installers operating within the hydraulic systems and heating and cooling sector. This app can be used to size water or air pipes accurately and calculate both localised and widely distributed pressure drops easily, wherever you are. The app, featuring a fully redesigned frontend, offers a new-look interface and improved performance. Download the app and start designing with speed and precision! Main Features of the Update: - Native Look & Feel: new, more modern and intuitive interface - Alignment with Standards: compatible with the latest mobile app standards - Enhanced Performance: optimised performance to guarantee a fluid and reactive user experience Functions: - Accurate sizing of water or air pipes - Customisable calculations based on technical parameters - Extensive library of materials and configurations Why Choose Us? - Precision: advanced calculation tools ensure accurate results - Innovation: the new version is enhanced with cutting-edge technologies which offer improved performance and greater ease of use - Complete support: compatible with the latest iOS devices
Si
Instantly and accurately displays numerous measurements like pressure and temperature for specific devices. It supports long-range Bluetooth connectivity and can store and update approximately 120 refrigerants, including environmentally friendly options.
- Real-time measurement display
- Bluetooth 4.2 connectivity (up to 30m)
- Storage for ~120 refrigerants
- Environmentally friendly refrigerant support
- Updateable refrigerant database
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This App is used to instantly and accurately display numerous measurements, including pressure, temperature, etc., for the Si-RM3, Si-RM13, Si-RV3, and Si-RM1. It comes with long-range low-energy Bluetooth® 4.2 up to 30 meters (98 ft) and the ability to store and update approximately 120 refrigerants, including environmentally-friendly low global warming potential (GWP) and natural refrigerants.
Screenshots
Verdict
The clearest difference is rating: Caleffi Pipe Sizer at 5.0 against Si's 1.0. Caleffi Pipe Sizer also leads on review sentiment (50% vs 33%). Si's advantage is update cadence (every 2 months vs every 7 months). On price, ratings volume, 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.
Caleffi Pipe Sizer holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively. Written reviews point the same way: 50% of Caleffi Pipe Sizer's written reviews are positive against 33% of Si's.
Caleffi Pipe Sizer ships an update every 7 months, Si every 2 months. The most recent releases landed on October 2, 2026 and October 6, 2026 respectively.
| Parameter | Caleffi Pipe Sizer | Si |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | 1.0 (1 ratings) |
| Positive reviews | 50.0% of reviews — better | 33.3% of reviews |
| Number of ratings | 1 | 1 |
| Update frequency | Every 7 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 | 12.4 — better |
| Further details — not scored | ||
| Size | 44 MB | 87 MB |
| Age rating | 4+ | 4+ |
| Developer | Caleffi S.p.A | SAUERMANN INDUSTRIE |
Customer experience
Caleffi Pipe Sizer
Si
In-app purchases
Caleffi Pipe Sizer
No in-app purchases
Si
No in-app purchases
Questions
Is Caleffi Pipe Sizer free?
Is Si free?
Which has better reviews, Caleffi Pipe Sizer or Si?
Do Caleffi Pipe Sizer or Si have ads?
Which is updated more often, Caleffi Pipe Sizer or Si?
Other comparisons
