# Dry Tools vs TrueFlow HVAC Air Flow

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.

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.

## The numbers

| Metric | Dry Tools | TrueFlow HVAC Air Flow |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (5 ratings)](https://appshunter.io/ios/app/dry-tools/id1462240541/reviews) | [5.0 (4 ratings)](https://appshunter.io/ios/app/trueflow-hvac-air-flow/id1518628173/reviews) |
| Number of ratings | **5** | 4 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 5 weeks** |
| Monetization | Free | Free |
| Size | 45 MB | 129 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [CLIMATE BY DESIGN INTERNATIONAL, INC.](https://appshunter.io/developer/1462240540) | [The Energy Conservatory](https://appshunter.io/developer/504703668) |

## What reviewers say

### Dry Tools

[App page](https://appshunter.io/ios/app/dry-tools/id1462240541)

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.

**Highlights:** Air Stream Mixing Calculator, HVAC Formulas, Lead Time Wheel, Psychrometric Calculator, Integrated Weather Data, Educational Content, Industry Glossary

**Features:** macOS Compatibility

**In-app purchases:** none


### TrueFlow HVAC Air Flow

[App page](https://appshunter.io/ios/app/trueflow-hvac-air-flow/id1518628173)

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.

**Highlights:** Accurate airflow measurement, Direct CFM readings, Fast 2-3 minute readings, Easy field use, Wide range of configurations, Replaces air filter for measurement

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Dry Tools free?

Dry Tools is free to download, with no in-app purchases.

### Is TrueFlow HVAC Air Flow free?

TrueFlow HVAC Air Flow is free to download, with no in-app purchases.

### Which has better reviews, Dry Tools or TrueFlow HVAC Air Flow?

Dry Tools and TrueFlow HVAC Air Flow are both rated 5.0 out of 5 on the App Store, from 5 and 4 ratings respectively.

### Do Dry Tools or TrueFlow HVAC Air Flow have ads?

Neither Dry Tools nor TrueFlow HVAC Air Flow shows ads.

### Which is updated more often, Dry Tools or TrueFlow HVAC Air Flow?

Dry Tools ships an update every 6 months, and TrueFlow HVAC Air Flow every 5 weeks. Most recently, Dry Tools was updated on November 3, 2026 and TrueFlow HVAC Air Flow on November 3, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*