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
Read full descriptionHide full description
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
This application connects to specific Sauermann instruments to display real-time measurement data on your smartphone. It allows you to manage, save, and export measurement datasets in various formats, including PDF, CSV, and XML.
- Real-time measurement display
- Data management
- Report generation
- Export to PDF, CSV, XML
- Bluetooth connectivity
- Measurement of temperature, humidity, pressure, air velocity
Read full descriptionHide full description
Si-HVACR Measurement MobileApp delivers a user-friendly experience for the Si-TT3 / Si-TI3 / Si-HH3 / Si-VV3 / Si-VH3 / Si-PM3 Sauermann instruments. This app displays on your smartphone screen all the results in real time and allows the management of measurement datasets over a duration of your choice, to create reports to be saved and exported in PDF, CSV or XML format. Si-HVACR Measurement MobileApp relays the following measurements: - Temperature (thermocouple, NTC, ambient, infrared) - Relative humidity - Pressure - Air velocity - Calculated parameters (air velocity, airflow, dew point, absolute humidity, enthalpy, mixing ratio, wet bulb temperature). Convenient data transmission is ensured by low-consumption 4.2 Bluetooth® with a maximum open-field range of 49’ (15 meters).
Screenshots
Verdict
The clearest difference is review sentiment: Caleffi Pipe Sizer at 50% against Si's 0%. Caleffi Pipe Sizer also leads on rating (5.0 vs 3.0). On price, ratings volume, update cadence and ads 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 3.0. 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 0% of Si's.
Caleffi Pipe Sizer ships an update every 7 months, Si every 6 months. The most recent releases landed on October 18, 2026 and October 22, 2026 respectively.
| Parameter | Caleffi Pipe Sizer | Si |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | 3.0 (1 ratings) |
| Positive reviews | 50.0% of reviews — better | 0.0% of reviews |
| Number of ratings | 1 | 1 |
| Update frequency | Every 7 months | Every 6 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 | 55 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
