# GaugeRemote vs Ductulator

The clearest difference is price: GaugeRemote at Free against Ductulator's $3.99. GaugeRemote also leads on iOS requirement (6.0 vs 18.6). Ductulator's advantage is chart position (#64 vs unranked). On update cadence, ads, in-app purchases and device support there is nothing between them.

GaugeRemote is free to download; Ductulator costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

GaugeRemote ships an update every 3 months, Ductulator every 2 months. The most recent releases landed on September 22, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | GaugeRemote | Ductulator |
| --- | --- | --- |
| Price | **Free** | $3.99 |
| Rating | — | **[4.7 (317 ratings)](https://appshunter.io/ios/app/ductulator-duct-sizing/id1474939475/reviews)** |
| Number of ratings | — | **317** |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | — | Free |
| Best chart rank | — | **#64** |
| Size | 5 MB | 1 MB |
| Requires iOS | **6.0** | 18.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [RETROTEC, INC.](https://appshunter.io/developer/899311156) | [Wassim Murr](https://appshunter.io/developer/1474939474) |

## What reviewers say

### GaugeRemote

[App page](https://appshunter.io/ios/app/gaugeremote/id676264513)

**Features:** macOS Compatibility

**In-app purchases:** none


### Ductulator

[App page](https://appshunter.io/ios/app/ductulator-duct-sizing/id1474939475)

**Currently charting:** #64 Top Paid · Productivity (US App Store)

Instantly calculate HVAC duct sizes based on airflow, friction rate, or velocity. This tool provides accurate duct dimensions in seconds without needing charts, supporting various duct types and units.

**Highlights:** Instant duct sizing, Friction rate or velocity calculation, Multiple valid duct dimensions, IP and SI units support, Detailed sizing mode, Rectangular, circular, and flexible ducts

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is GaugeRemote free?

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

### Is Ductulator free?

Ductulator costs $3.99, with no in-app purchases.

### Do GaugeRemote or Ductulator have ads?

Neither GaugeRemote nor Ductulator shows ads.

### Which is updated more often, GaugeRemote or Ductulator?

GaugeRemote ships an update every 3 months, and Ductulator every 2 months. Most recently, GaugeRemote was updated on September 22, 2026 and Ductulator on September 26, 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.*