# Duct Calculator Elite — user reviews > 18 indexed App Store user reviews of Duct Calculator Elite by Cyberprodigy LLC, rated 4.80/5 from 232 ratings. - Source: https://appshunter.io/ios/app/duct-calculator-elite/id665701601/reviews - App overview in markdown: https://appshunter.io/ios/app/duct-calculator-elite/id665701601.md - Rating breakdown: 5★ 200 · 4★ 21 · 3★ 5 · 2★ 0 · 1★ 6 ## Most critical reviews (10 lowest-rated) ### 1/5 — Right now er I *2023-09-11* Erryu i. Tgdfstate (which I I. Zooycothink tu ze’d ### 1/5 — NOT A GOOD APP *2021-08-17* When sizing based upon airflow, the result gives random fractional duct sizes like 5.3 x 9.6; doesn’t allow even numbered duct sizes. Pretty worthless to me, even if it were free. **Developer response:** In this mode, the app calculates the exact duct size required to meet the specified airflow, velocity, friction, and aspect ratio of the duct. Users will typically round to the closest standard duct size that would be required. The actual duct size can also be input into the size by dimension calculator within the app to see what airflow, velocity and friction it will produce. ### 1/5 — Does not do what it leads you to believe. *2021-04-18* For $6.99 this app is not worth purchasing. It leads you to believe it will help you solve duct size airflow problems. IMHO, it is not worth purchasing. **Developer response:** This app allows users to solve for duct size required for various combinations of airflow, velocity, and friction. It can also solve for airflow, velocity, or friction given duct size as an input. The app is a digital equivalent of a ductulator tool for contractors. It will not solve airflow problems or design ducting for an entire home. ### 1/5 — Air flow calculator *2020-02-22* Doesn’t work. Rip off. Placed it my iphone max, strong internet doesn’t work ! **Developer response:** We are unaware of any incompatibilities with the iPhone Max. Please contact us at techsupport@cyberprodigy.com and provide us a description of what is not working on your device. We would be glad to look into any problems you are having. ### 1/5 — Unverschämtheit *2015-06-19* Schlechte bzw falsche bzw sinnentstellende Übersetzung, ein Mischmasch physikalischer Einheiten, für den Berufsalltag VOLLKOMMEN UNBRAUCHBAR. Ich kann jedem nur raten: Finger weg von dieser App, das ist Geldverschwendung im Grenzbereich zur Abzocke/ Betrug. Vollkommen unverständlich, warum Apple solch minderwertiges Zeugs in seinen App-Store reinlässt. Eigentlich: minus 5 Sterne ### 1/5 — Don't waste your money *2014-03-24* Go to a ductulator , it's far better !!!! ### 1/5 — No go *2013-08-06* Completly unsatisfied... I want my money back ### 3/5 — Instructor *2025-03-27* There is a bug in the APP. I use the APP in class and I noticed a bug that is new. Please fix it. ### 3/5 — Pratique, mais... *2013-07-17* Pratique, mais dommage que l'on ne puisse pas avoir dans les préférences le débit en m3/h ### 4/5 — Excellent, but one major omission *2023-12-04* Excellent app, but you guys need to add m3/hr this is the only reason I don’t give you 5 stars ## Most praised reviews (8 highest-rated) ### 5/5 — Time saver *2024-10-04* Excellent, I use it almost everyday ### 5/5 — Works just like a slide rule. *2020-04-22* When using on a system that was sized corectly per ACCA or whatever load calc program your country uses its spot on ### 5/5 — Worth the $ *2014-05-27* This hvac app is the best by far. I was debating the price tag at first but am very happy with the purchase. ### 5/5 — Duct Calulator *2014-03-29* The best I have used and that's several. I only use this one now, so easy. Thank you very much. ### 5/5 — Rock Solid *2014-02-07* By far the best duct calc. Extremely easy to use. I absolutely love this thing. ### 5/5 — Ductulator plus *2013-09-30* This is much easier than the sliders to enter the exact values I want....use it all the time...A+ Well worth the money! ### 5/5 — Awesome *2013-07-13* Very pleased with this app. The ability to change between units and set temperature/elevation is easy and very useful for what I need to do. Results are precise and accurate. Well done! ### 5/5 — 5 star *2013-07-11* Very easy to use and packed with options. This app is a keeper! --- *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 2026-08-27.*