Dry Tools vs TrueFlow HVAC Air Flow
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Dry Tools
This app provides HVAC professionals and students with essential calculation tools, including air stream mixing, HVAC formulas, lead time planning, and a psychrometric calculator with weather data. It also offers educational content and industry-specific terminology.
- Air Stream Mixing Calculator
- HVAC Formulas
- Lead Time Wheel
- Psychrometric Calculator
- Integrated Weather Data
- Educational Content
- Industry Glossary
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Dry Tools by CDI contains multiple tools to calculate Air Stream Mixing, HVAC formulas, Lead Times, as well as a Psychrometric calculator with integrated weather data for HVAC professionals and students. The app is designed to be your first step to calculating the conditions you need to achieve your critical mission. Key Features: Tools • Air Stream Mixing: Solve for mixed air conditions from any two airstreams . • HVAC Formulas: Handy, commonly used formulas where moisture in air is concerned. • Lead Time Wheel: Helpful tool for planning project lead times. • Psychrometric Calculator: Enter any two data points and get all the others. • Weather Data: GPS locator or search for ambient weather conditions worldwide. Education • Dr. Dry Talks: From relative humidity to vapor pressure, easy learning with dry humor. • Glossary: Not so common, commonly used terms in our industry. Products • Air Handling • Desiccant Dehumidification • Service More • Contact Us • About Us • To Our Competition In summary, Dry Tools will provide you with the tools you need in one handy app. Install the free App and get started on your psychrometric journey.
TrueFlow HVAC Air Flow
This tool offers a simple and accurate way to measure airflow through residential air handlers. It provides direct CFM readings quickly, without complex calculations. Designed for ease of use in various air handler configurations.
- Accurate airflow measurement
- Direct CFM readings
- Fast 2-3 minute readings
- Easy field use
- Wide range of configurations
- Replaces air filter for measurement
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The all new Digital TrueFlow® Air Handler Flow Meter provides a simple and accurate measurement of airflow through residential air handlers. The Digital TrueFlow® Meter temporarily replaces the filter in the air handler distribution system during the airflow measurement process. If the filter location is directly adjacent to the air handler, the TrueFlow Meter will measure the total air handler flow. If the filter is located remotely at a central return, the TrueFlow Meter will measure airflow through the central return. TrueFlow Air Handler Flow Meter Easy and fast to use in the field. The TrueFlow Meter provides direct CFM readings in 2 to 3 minutes without extensive calculations or setup. Can be used in a wide range of return plenums and air handler fan configurations. Proven to be more accurate than the single-point temperature rise method and easier than the fan curve method.
Screenshots
Verdict
The clearest difference is update cadence: TrueFlow HVAC Air Flow at every 5 weeks against Dry Tools's every 6 months. Dry Tools's advantage is iOS requirement (11.0 vs 15.0). On price, rating, review sentiment and ratings volume 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.
On the App Store both sit at effectively the same score — 5.0 for Dry Tools against 5.0 for TrueFlow HVAC Air Flow. Both are backed by a comparable volume of ratings — 5 and 4 respectively. Written reviews split almost evenly too, at 100% and 100% positive.
Dry Tools ships an update every 6 months, TrueFlow HVAC Air Flow every 5 weeks. Both last shipped on November 3, 2026.
| Parameter | Dry Tools | TrueFlow HVAC Air Flow |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (5 ratings) | 5.0 (4 ratings) |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 5 — better | 4 |
| Update frequency | Every 6 months | Every 5 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 11.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 45 MB | 129 MB |
| Age rating | 12+ | 4+ |
| Developer | CLIMATE BY DESIGN INTERNATIONAL, INC. | The Energy Conservatory |
Customer experience
Dry Tools
TrueFlow HVAC Air Flow
In-app purchases
Dry Tools
No in-app purchases
TrueFlow HVAC Air Flow
No in-app purchases
