DSMally vs TrueFlow HVAC Air Flow
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
DSMally
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Energy efficiency program software and services. DSMally is a mobile app for trade allies to file audits and to deliver notifications of completed work. DSMfolio is administrative software for rebate claim intake, tracking, and reporting. Powered by Incentit. There are no purchases, no exchanging of money or subscription. Businesses use our app to enable their employees to perform field service. The app is used to collect data and send the data to a centralized location where the data can be acted upon. For example, a person needs a new furnace. Data would be collected by our app as to why the person needs a new furnace.
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 DSMally's every 3 months. On price, ads, in-app purchases and device support 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.
DSMally ships an update every 3 months, TrueFlow HVAC Air Flow every 5 weeks. The most recent releases landed on November 7, 2026 and November 3, 2026 respectively.
| Parameter | DSMally | TrueFlow HVAC Air Flow |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (4 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 4 — better |
| Update frequency | Every 3 months | Every 5 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.1 | 15.0 — better |
| Further details — not scored | ||
| Size | 36 MB | 129 MB |
| Age rating | 4+ | 4+ |
| Developer | Incentit, LLC | The Energy Conservatory |
In-app purchases
DSMally
No in-app purchases
TrueFlow HVAC Air Flow
No in-app purchases






