# Easy Offset > HVAC offset calculation tool for cut joints, centerlines, and lengths. (iPhone/iPad app by Allen Sieler.) - Source: https://appshunter.io/ios/app/easy-offset/id412835048 (this page in markdown: same URL + `.md`) - Developer: [Allen Sieler](https://appshunter.io/developer/412835051) - Category: Productivity - Price: $4.99 - Rating: 4.30/5 from 25 App Store ratings · 48 written reviews indexed - Age rating: 4+ - Requires: iOS 9.1 · 33 MB - Languages: American English - Released: 2011-01-12 - Data updated: 2026-08-26 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/easy-offset/id412835048/reviews.md ## What is Easy Offset? Easy Offset is an easy to use program designed for the HVAC industry that calculates cut joints, elbow centerlines, and overall lengths for offsets of any angle. Saves time: -faster than using a calculator -improved accuracy -no multipliers or trig formulas to remember -reduces errors -minimizes cutting in the field and wasted material -use any angle -useful for field layout and detailing Types of Offsets: -round elbows -rectangular elbows with radius heel and throat -rectangular elbows with straight heel and throat -round taps on an angle -rolled nineties -wye branches ## Key features - Calculates cut joints - Calculates elbow centerlines - Calculates overall lengths for offsets - Supports any angle offsets - Handles various elbow types (round, rectangular) - Supports round taps and wye branches ## Chart rankings - #39 in Top Paid · Productivity (US App Store) ## Recent user reviews (10 of 48) All indexed reviews: https://appshunter.io/ios/app/easy-offset/id412835048/reviews.md ### 5/5 — Awesome *2019-11-28, version 1.2* This app is amazing, I use it all the time. Very accurate and simple. ### 5/5 — Dear Allen, *2019-10-11, version 1.2* Can you make it so we can fill in the cut joint length, Centerline length, and overall length? ### 2/5 — Happy with what it is but not really handy unless you have fittings *2018-07-18, version 1.1.1* Okay for what it is, if you have fittings. But just use the good old owl method if you have to figure out a pie offset in your duct. ### 4/5 — Well *2018-07-06, version 1.1.1* Not as good as the android version..... ### 5/5 — It’s worth it!!!! *2018-06-08, version 1.1.1* I’ve done several exposed spiral jobs where the pipe needed to stay slammed to the deck and drop at the last second for the perpendicular run. Of course Once you know your measurements/radius’s and allowances this is sooooo easy to use and layout with. I finished the whole floor before one side of the building was tossed up. Thank you for updating to 64bit. Just a thought though update the author email address, no one ever answered my emails. ### 1/5 — Update took away some features *2018-05-17, version 1.1.1* As I’m using this app I noticed that this version has less features than the previous version I have no tools menu and can’t see certain diagrams ### 5/5 — Any update coming soon??? *2018-03-10, version 1.1.1* This is an awesome app to use at work... when it is working! ### 5/5 — Thanx. Love the update *2018-02-12, version 1.1.1* Glad u did it. Thank u ### 5/5 — Update to IOS 11 *2018-02-09, version 1.1.1* We appreciated this App. Please update to IOS 11. Used it all the time in the field and shop. Thanks Thanks for the update. It’s better than ever now. I see by the reviews many others missed it also. You had us spoiled, it was so quick and “easy offset”. So now we don’t have to do —- 45° offset x 1.414 x .707 For cutout and length 30° offset x 2. x .866 60° offset x1.154 x .500 and minus the throat length twice. ( of course don’t forget to add another 1” to the cut joint for your slip and drives ) We appreciate your effort. Thanks ### 5/5 — iOS 11 update *2018-02-07, version 1.1.1* Loving the app finally updated app to iOS 11. ## Frequently asked questions about Easy Offset ### What does Easy Offset do? Easy Offset is a program designed for the HVAC industry that calculates cut joints, elbow centerlines, and overall lengths for offsets of any angle. It aims to save time and improve accuracy compared to manual calculations. ### What types of offsets can this app calculate? The app can calculate offsets for round elbows, rectangular elbows with radius or straight heels/throats, round taps on an angle, rolled nineties, and wye branches. ### How does this app save time and reduce errors? It saves time by being faster than using a calculator, eliminating the need to remember multipliers or trig formulas, and reducing errors. This also minimizes cutting in the field and wasted material. ### Is this app free to use? Based on the provided information, the app is a paid application. It does not have in-app purchases or advertisements. ### Who would benefit from using Easy Offset? This app is particularly useful for HVAC professionals involved in field layout and detailing. It helps in accurately calculating various offset parameters for different ductwork components. ## Version history (last 4 releases) ### 1.2 — 2018-11-06 Additional tools have been added: -arc length calculator -trigonometry calculator -mitered duct calculator (owl) -fractional output -round and rectangular equivalents with friction loss ### 1.1.1 — 2018-02-06 Updated for IOS 11. ### 1.1 — 2011-05-11 Added demonstration video at support website. Click support link for more information. ### 1.0 — 2011-01-12 No release notes. ## Apps similar to Easy Offset | App | Rating | Price | Category | | --- | --- | --- | --- | | [Digitales Lüftungsaufmaß](https://appshunter.io/ios/app/digitales-luftungsaufma/id1583576047) | 5.0 (1) | Free | Productivity | | [Duct Construction](https://appshunter.io/ios/app/duct-construction/id6443518338) | 1.0 (1) | $0.99 | Productivity | | [Pipe Fitting](https://appshunter.io/ios/app/pipe-fitting/id6743724584) | 4.6 (116) | Free | Productivity | | [Homans HVAC Pro+](https://appshunter.io/ios/app/homans-hvac-pro-plus/id1378637418) | 4.7 (68) | Free | Productivity | | [Offset Calc App ANSI](https://appshunter.io/ios/app/offset-calc-app-ansi/id1463259532) | 5.0 (19) | $6.99 | Productivity | | [Ductulator - Duct Sizing](https://appshunter.io/ios/app/ductulator-duct-sizing/id1474939475) | 4.7 (317) | $3.99 | Productivity | ## More apps by Allen Sieler - [Quilt-a-lator](https://appshunter.io/ios/app/quilt-a-lator/id6752760090) All apps by Allen Sieler: https://appshunter.io/developer/412835051 ## Related topics [easy offset](https://appshunter.io/ios/topics/easy-offset) · [ogset](https://appshunter.io/ios/topics/ogset) · [offset](https://appshunter.io/ios/topics/offset) --- *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 2026-08-26.*