# Ductulate HD — user reviews > 26 indexed App Store user reviews of Ductulate HD by Steven Ramsay, rated 4.90/5 from 23 ratings. - Source: https://appshunter.io/ios/app/ductulate-hd/id441054001/reviews - App overview in markdown: https://appshunter.io/ios/app/ductulate-hd/id441054001.md - Rating breakdown: 5★ 21 · 4★ 2 · 3★ 0 · 2★ 0 · 1★ 0 ## Newest reviews (10 of 26) ### 5/5 — Beautiful Ductulator *2013-02-13* Excellent Ductulator, great display, and smooth functions. Great app! ### 5/5 — Fabulous App! *2013-02-09* . ### 5/5 — Hr *2013-01-17, version 2.2* Great app, quick and easy, just like the original! ### 5/5 — Great app *2012-12-31* I use this app all of the time and love it. ### 5/5 — Great *2012-11-15, version 2.2* As good as it could possibly be. Well done on a great app. ### 5/5 — Nice app *2012-05-09* Simple to use and let's you leave your old cardboard ductulator back in the office. ### 5/5 — Quick, quick, quick... *2011-11-04* I use design software when installing a new system or completely replacing an existing system for accurately determining heat gain/loss and duct design and sizing. But there are plenty of jobs where I'm doing a simple change out and I just want to verify what is currently installed and get an estimate on airflow. This tool replaces the paper tool I used to use and is accurate to within 5% when I check it against my $1500 software tool. Would I use it place? Nope. But are there situations where it makes more sense than me spending two hours laying out a system with my laptop? Absolutely. Well worth the $7.99 I paid for it. ### 5/5 — Perfect Ductulator App! *2011-10-31, version 2.0* This is a great app, it does exactly what It is suppose to do and its nice and simple to operate. I would love to have a version of this on my iPhone so it was always with me as its incredibly useful. ### 5/5 — Awesome!! *2011-09-15* The new update is great. I have just put my paper ductulator on the shelf. The skins look great and the app is very easy to use. I like the lock feature so that you can lock an airflow and pressure in while you look at a sizes. Fantastic. Thanks for listening to suggestions and improving the app. ### 5/5 — Great Ductulater *2011-09-13, version 1.0* Simple and easy to use. The best thing about it is that it's quick. No settings to deal with, no defaulting back to figures you hardly use. ## Most critical reviews (10 lowest-rated) ### 1/5 — Metric *2011-06-06* Needs to be in American measuring scale. Inches and cfm. Wasted 2$. But I didn't read it close ### 4/5 — Very Useful *2018-07-18, version 3.0* Good app, works as it should. ### 4/5 — Great at first *2013-08-05* Worked great for a few weeks, but now it crashes as soon as I open the app. ### 4/5 — Perfect *2013-03-02* It's good, it's simple and to the point. Thank you. ### 4/5 — Great app, would like flex duct conversion *2013-02-25* If this had a conversion for flexible duct, I would have given it 5 stars. Besides that... A fantastic app! ### 4/5 — Principal MechWave Eng. *2011-10-31, version 2.0* Simple and easy to use. The graphical interface is intuitive and allows you to quickly size ducts and review existing designs. ### 5/5 — Reliable *2020-05-27* Main reason I use my iPad at work. Handy, doesn’t get coffee spilled on it, and matches with every duct calc I have ### 5/5 — Beautiful *2019-08-10* One of the nicest Ductulator I have ever used ### 5/5 — Size trunk lines everyday *2019-08-09* I use this everyday to size my trunklines for correct throw distance and reducer sizes. Same old ductulator I learned from in the late 90s very handy. ### 5/5 — Perfect *2016-03-29* An iPad app version of my old cardboard ductoloator. Simple to use. Visually attractive interface. Thank you, Mr. Ramsay! ## Most praised reviews (6 highest-rated) ### 5/5 — Great app *2013-09-11* This is the same, very useful ductulator that we all know and love, but in a very convenient platform. So handy to have on the job site. ### 5/5 — Works good *2013-09-04* One of the best. ### 5/5 — great app *2013-06-18* Got this to use when I am out of the office but works so well that I now use this all the time. ### 5/5 — Mr. g *2013-06-06* Great app no longer need the ductulator. Display scales is bright & clear. ### 5/5 — Duct Dimensions *2013-03-30, version 2.2* Does not allow for input of ducts greater than 2500mm X 2000mm. This needs to be revised for commercial use..... ### 5/5 — I have been waiting for a Nice app like this *2013-03-01* Awesome app very impressive! --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-04.*