Comparison

GaugeRemote vs Ductulator

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

GaugeRemote

Features
Read full description

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

About

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.

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
Currently charting
Read full description

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

GaugeRemote4 screens
Ductulator4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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

UpkeepUpdate frequency

GaugeRemote ships an update every 6 months, Ductulator every 2 months. Both last shipped on November 11, 2026.

Scorecard4 real differences · 7 level
GaugeRemote versus Ductulator: the parameters behind the verdict, then further details
ParameterGaugeRemoteDuctulator
PriceFree — better$3.99
Rating—4.7 (362 ratings) — better
Positive reviews—50.0% of reviews
Number of ratings—362 — better
Update frequencyEvery 6 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNoNo
Monetization—Free
Best chart rank—#69 — better
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better18.6
Further details — not scored
Size19 MB1 MB
Age rating4+4+
DeveloperRetrotec, 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

None

GaugeRemote

No in-app purchases

None

Ductulator

No in-app purchases

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 6 months, and Ductulator every 2 months. Most recently, GaugeRemote was updated on November 11, 2026 and Ductulator on November 11, 2026.

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