# Chemours PT Calc — user reviews > 31 indexed App Store user reviews of Chemours PT Calc by The Chemours Company, rated 4.60/5 from 13 ratings. - Source: https://appshunter.io/ios/app/chemours-pt-calc/id480622238/reviews - App overview in markdown: https://appshunter.io/ios/app/chemours-pt-calc/id480622238.md - Rating breakdown: 5★ 11 · 4★ 1 · 3★ 0 · 2★ 0 · 1★ 1 ## Newest reviews (12 of 31) ### 5/5 — Great App *2012-10-11, version 1.0* Will not calculate superheat or subcool. I use it everyday. Please please please fix....thanks alot. ### 5/5 — Superheat and subcooling not working *2012-10-05, version 1.0* Great app!! Very useful! When can we use it again. Send out update for this app. ### 5/5 — Great *2012-10-02, version 1.0* Great tool that I use everyday but not working with new update fix it please ### 5/5 — Well *2012-09-26, version 1.0* Plz fix can't calculate superheat and subcooling after up grade to my phone thx ### 5/5 — Nice App ! *2012-07-26, version 1.0* calculator vs. paper/pencil... I'll use the calculator, thank you ### 5/5 — Great app *2012-05-28, version 1.0* Good bye old paper friend, hello technology ### 5/5 — A must have *2012-05-03, version 1.0* Great app, very easy to use and very accurate. Keep up the good work! ### 5/5 — Great app *2012-04-04, version 1.0* No longer have to keep up the paper pt charts. ### 5/5 — Cool breeze heating and a/c *2012-02-24, version 1.0* EXCELLENT app ### 5/5 — Job saver *2012-02-19, version 1.0* Very easy to use. Wonderful app. I use this for working on refrigerated dryers. Has the P/T charts and it even Calculates sub cooling and super heat. My only complaint, Please make the app rotatable. I use a keyboard on iPad. And it's imposable to use when plugged in. Great job guys. I would have paid a few dollars for it. ### 5/5 — Kudos !! *2012-01-09, version 1.0* I love this app. ### 5/5 — Great product *2011-12-21, version 1.0* This product is great! Whoever made it is a saint! ## Most critical reviews (10 lowest-rated) ### 1/5 — Cm *2013-10-16, version 1.1* Where's R-11 and R-123. I work on chillers so it would be nice. ### 2/5 — App Concerns *2012-10-16, version 1.0* Superheat and sub-cooling will not calculate on my I-phone 5 this is something I would use everyday. Please fix ### 3/5 — Feedback *2014-10-18* Good app. . The SI units unfortunately does not allow pressure values above 999. ### 3/5 — Needs gas added *2013-05-20, version 1.1* Would give more stars but why no R408A ??? ### 4/5 — Better then a paper chart *2013-03-29, version 1.1* I love this app. I would like to see my refrigerant selection auto select to all sections. And for it to remember my entries if the screen goes to sleep. I'd also like to see a way to favorites refrigerants. Since I only work with R-22, R-410a and occasionally MO99. Work in target superheat calculation and this would be the only app I need on a daily basis. ### 4/5 — 2 *2012-10-01, version 1.0* Nice app works great .does not work after update of phone please fix ### 4/5 — Subcooling *2012-09-29, version 1.0* Superheat and subcooling not working now after upgrade to operating system on iPad 3. Everything else is still working great. ### 4/5 — Oneil *2012-09-10, version 1.0* Everything else work except for sub cooling an superheat on my iPhone 4S ### 4/5 — P/T Chart Review *2011-12-15, version 1.0* Great App from the refrigerant supplier. Need to add low pressure refrigerants. ### 5/5 — Please add 454c *2024-09-27, version 1.4* Please add 454c ## Most praised reviews (9 highest-rated) ### 5/5 — Please add R448A *2024-08-19, version 1.4* Many of our systems are being changed over to R448A which is missing from the refrigerant list on the app. ### 5/5 — Add R290 please!! *2019-06-07, version 1.4* Love the app. Use it daily. Simply proves I did my math right. Please add R290!! ### 5/5 — Awesome! *2014-08-04, version 1.1* Best app ever! Better than paper and so easy to use and read ### 5/5 — Good app!!! *2014-06-19, version 1.1* Tres bonne application, facile a utiliser! ### 5/5 — Needs! *2013-02-25, version 1.1* Needs to have a chart for heat pumps! ### 5/5 — Pt *2013-01-26, version 1.1* Very nice app i hate the paper charts ### 5/5 — Great job ! *2012-11-01, version 1.1* Great to see this powerful App being supported and kept current. Thanks Dupont. ### 5/5 — WORKS AGAIN!!! *2012-10-26, version 1.1* THANKS GUYS. GIRLS. WHOEVER FIXED THE BUG. THANK YOU!!!!! ### 5/5 — SuperHeat SubCooling *2012-10-16, version 1.0* I cant seem to get a reading from both, i think it might have to do with ios 6... --- *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 2026-06-09.*