GaugeRemote vs Ductulator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
GaugeRemote
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GaugeRemote is the remote control for the Retrotec DM-32 digital pressure and flow gauge, used for blower door and duct leakage testing. It shows the gauge's own screens, live, on your iPhone or iPad, and lets you work the gauge from across the building: • Live pressure, flow and fan readings, exactly as the gauge shows them • Set fan speed or a target pressure, nudge it up or down, and stop the fan • Choose the fan model, range, display mode, time averaging and baseline • Settings pages, @Pressure and the gauge's Diagnostics page (battery, network, link and firmware details) • The gauge's own language: English, German, French or Spanish • A link-health view that tells you plainly when the connection is weak and what to do How it connects GaugeRemote talks to the gauge over your local Wi-Fi network, or over the gauge's own Wi-Fi access point (its network name is DM32- followed by the gauge's serial number). It finds DM-32 gauges on the network by itself and remembers the ones you used. It needs a Retrotec DM-32 gauge with firmware 3.0; firmware 3.0 Builds 26 to 28 do not work over Wi-Fi, so update the gauge to the 3.0 release (free, with Retrotec's DM-32 Firmware Update page). It does not work with other gauges, including the DM32X. Try it without a gauge The connection screen's Simulator option runs a built-in simulated DM-32, so you can explore every screen first. Privacy GaugeRemote collects no personal data. It has no accounts, no analytics and no ads, and it talks only to your gauge on the local network. The few settings it keeps (the gauges you connected to and display preferences) stay on your device. Support: support@retrotec.com
Ductulator
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.
- 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
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Size HVAC ducts instantly using airflow, friction or velocity. Get accurate duct dimensions in seconds — no charts required. • Get a range of suitable duct sizes based on friction rate or velocity. • Get multiple valid duct dimensions instantly. • Tap on Friction Rate or Velocity to toggle between calculation methods. • IP and SI units. • Detailed sizing mode to adjust the duct dimensions and air flow rates. • Supports rectangular, circular and flexible ducts. • Automatic friction and velocity updates. Calculations are based on standard air 0.075 lb/ft3 (1.2 kg/m3) in clean galvanized steel or non-metallic flexible ducts. Any feedback is welcome, and will be the basis for future updates.
Screenshots
Verdict
The clearest difference is price: GaugeRemote at Free against Ductulator's $3.99. GaugeRemote also leads on iOS requirement (15.0 vs 18.6). Ductulator's advantage is update cadence (every 2 months vs every 6 months) and chart position (#69 vs unranked). On 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
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 6 months, Ductulator every 2 months. Both last shipped on November 11, 2026.
| Parameter | GaugeRemote | Ductulator |
|---|---|---|
| Price | Free — better | $3.99 |
| Rating | — | 4.7 (362 ratings) — better |
| Positive reviews | — | 50.0% of reviews |
| Number of ratings | — | 362 — better |
| Update frequency | Every 6 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Best chart rank | — | #69 — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.0 — better | 18.6 |
| Further details — not scored | ||
| Size | 19 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Retrotec, Inc. | Wassim Murr |
Bugs and requests
GaugeRemote
Not enough reviews yet to summarise bugs or requests.
Ductulator
Reported bugs
4 issues- Decimal point doesn't work on calculator
- New flex option isn't working properly
- Friction rate can't be changed in the latest version
- Skips duct sizes (e.g., 24-26)
Requested features
5 requests- Ability to pick duct size and see CFM
- Include flat oval ducts
- Option to select round or square duct
- Ability to enter duct size and get CFM
- Option for flex duct
In-app purchases
GaugeRemote
No in-app purchases
Ductulator
No in-app purchases
Questions
Is GaugeRemote free?
Is Ductulator free?
Do GaugeRemote or Ductulator have ads?
Which is updated more often, GaugeRemote or Ductulator?
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