UEi DTHA2 vs Digiduct
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
UEi DTHA2
This app connects to a wireless adapter to measure airflow velocity, volumetric flow, temperature, and relative humidity. It allows adjustments for ducting and offers averaging options for readings.
- Measure airflow velocity
- Measure volumetric flow
- Measure temperature
- Measure relative humidity
- Adjust for ducting
- Time or point averaging
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The companion app for UEi's DTHA2 wireless adapter. Enable Bluetooth on your mobile device, launch the app, connect DTHA2 and measure: a) Airflow velocity (ft/min, mph, m/s, or km/h) b) Volumetric flow (CFM, m^3/h, or L/s) c) Temperature (F or C) d) Relative Humidity The app allows you to adjust for Round or Rectangular Ducting (in or cm) as well as take Averages over Time or Average via Point readings.
Digiduct
This HVAC tool assists professionals with duct sizing calculations based on ASHRAE standards. It supports multiple duct shapes and offers intelligent features to ensure accurate and reliable designs for real-world scenarios.
- Duct sizing for rectangular, round, and flat oval ducts
- Customizable dimensions with locked values
- Duct location intelligence for context-aware sizing
- Calculations based on CFM, pressure drop, or velocity
- Alerts for exceeding pressure drop or velocity limits
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The Digiduct app is a powerful tool designed for HVAC professionals, supporting everything from design calculations to real-time field verification. Built utilizing the equations and recommendations from the ASHRAE Fundamentals – Duct Design chapter, it ensures your calculations are accurate and reliable, saving you time and reducing errors. Key Features: • Multiple Shape Sizing Options: Supports sizing for rectangular, round, and flat oval ducts, offering flexibility for various duct designs. • Customizable Dimensions: For rectangular and oval ducts, users can lock in one dimension, and the app calculates the other, ensuring precise results based on CFM, pressure drop due to friction, or velocity. • Duct Location Intelligence: offers the user predefined parameters to use as starting point and reference when selecting duct sizes so users at HVAC experience level can make confident selections. Why Choose Digiduct? Unlike other duct sizing tools, Digiduct goes above and beyond. It doesn’t just provide basic size outputs—it evaluates the location and context of your duct (high-pressure vs. low-pressure, shaft vs. plenum), alerting you if your selection exceeds maximum pressure drop or velocity limits. This added layer of intelligence ensures higher accuracy and gives users confidence that their sizing is optimal for the application. Get the assurance of precision with Digiduct—designed to meet the demands of real-world HVAC scenarios.
Screenshots
Verdict
The clearest difference is rating: Digiduct at 4.6 against UEi DTHA2's 4.0. Digiduct also leads on update cadence (every 2 months vs every 7 months). UEi DTHA2's advantage is monetization model (free vs ad-supported) and iOS requirement (12.0 vs 26.2). 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.
Digiduct holds the better App Store score, 4.6 against 4.0. Both are backed by a comparable volume of ratings — 4 and 11 respectively.
UEi DTHA2 ships an update every 7 months, Digiduct every 2 months. The most recent releases landed on October 15, 2026 and October 16, 2026 respectively.
| Parameter | UEi DTHA2 | Digiduct |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (4 ratings) | 4.6 (11 ratings) — better |
| Positive reviews | 50.0% of reviews | — |
| Number of ratings | 4 | 11 — better |
| Update frequency | Every 7 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Ad-supported |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 12.0 — better | 26.2 |
| Further details — not scored | ||
| Size | 17 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Kane Asia Inc. | Syska Hennessy Group |
Customer experience
UEi DTHA2
Digiduct
In-app purchases
UEi DTHA2
No in-app purchases
Digiduct
No in-app purchases









