# PRA and HTN > Medical app for antihypertensive drug selection using plasma renin activity. (iPhone/iPad app by Augustus Hough.) - Source: https://appshunter.io/ios/app/pra-and-htn/id601765986 (this page in markdown: same URL + `.md`) - Developer: [Augustus Hough](https://appshunter.io/developer/601766369) - Category: Medical - Price: Free - Rating: 5.00/5 from 3 App Store ratings · 5 written reviews indexed - Age rating: 17+ - Requires: iOS 15.1 · 23 MB - Languages: American English - Released: 2013-02-20 - Data updated: 2026-06-10 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/pra-and-htn/id601765986/reviews.md ## What is PRA and HTN? The Renin, PRA & Hypertension App uses plasma renin activity (PRA) testing to guide antihypertensive drug selection with the goal of effective blood pressure control with as few agents as possible. It is based on the concept that hypertension is sustained by an excess of either body sodium-volume (V) or plasma renin (R), and that all antihypertensive drugs are either anti-V or anti-R. A low PRA indicates V hypertension, treatment with an anti-V drug, and (if no compelling indications) subtraction of anti-R drugs. A medium to high PRA indicates R hypertension, treatment with an anti-R drug and then, if renin is blocked and BP not controlled, adding an anti-V drug. ## Key features - Guides antihypertensive drug selection - Uses plasma renin activity (PRA) testing - Targets effective blood pressure control - Minimizes medication use - Categorizes hypertension types ## Recent user reviews (5 of 5) All indexed reviews: https://appshunter.io/ios/app/pra-and-htn/id601765986/reviews.md ### 5/5 — Very helpful, easy-to-use app *2013-03-01* This app is very informative about PRA and very user friendly. Very helpful as an additional tool for managing HTN patients. ### 5/5 — A superb app that is useful for clinicians *2013-02-28* The PRA app is an excellent tool for guiding antihypertensive therapy and provides an alternative strategy to guessing ### 5/5 — Easy-To-Use and Informative App *2013-02-27* Not only does the app provide step-by-step guidance for interpreting PRA results, it also provides the resources and literature needed to more fully understand the concepts involved. ### 5/5 — Helpful App *2013-02-26* I use this method to manage my hypertension patients and is very effective as long as patients are compliant. App is user friendly and very informative to those not familiar with this method. ### 5/5 — Very useful app *2013-02-21* App is very useful, thanks. ## Frequently asked questions about PRA and HTN ### What is PRA and HTN? PRA and HTN is a medical application designed to assist in selecting antihypertensive drugs. It utilizes plasma renin activity (PRA) testing to guide treatment decisions for effective blood pressure control. ### How does PRA and HTN help with drug selection? The app categorizes hypertension based on PRA levels, indicating whether it's driven by sodium-volume or renin. This helps determine the most effective type of antihypertensive drug to initiate. ### What is the goal of using PRA and HTN? The primary goal of PRA and HTN is to achieve effective blood pressure control while using the fewest possible antihypertensive agents. It aims to personalize treatment based on individual patient physiology. ### What devices does PRA and HTN support? PRA and HTN is available for iPhone, iPad, and iPod devices. It is designed for use on Apple's mobile operating system. ### What is the age rating for PRA and HTN? PRA and HTN has an age rating of 17+. This is typical for medical reference applications that may contain complex medical information. ### How often is PRA and HTN updated? The latest version of PRA and HTN is 3.0.0, last updated on March 22, 2025. This indicates a recent update, suggesting ongoing development and maintenance. ### Is PRA and HTN free to use? Yes, PRA and HTN is available for free. There are no costs associated with downloading or using the application. ### What is the user sentiment for PRA and HTN? PRA and HTN has received excellent user feedback, with an average rating of 5.0 stars from 3 ratings. This suggests a highly positive reception from its current user base. ## Version history (last 5 releases) ### 3.0.0 — 2025-03-22 - App improvements ### 2.0.0 — 2021-04-14 - The upper limit of the normal range of PRA was reduced to 4.5 from 6.5 ng/ml/hr in accordance with recent observations. - Direct Renin ranges were provided for the treatment algorithm. - Apps recommendations associated with greater BP reduction (Clin Trans Sci 2021; 14:617). - App improvements ### 1.1 — 2015-11-21 - Updates for new devices - Minor text updates ### 1.0.1 — 2013-03-06 1.0.1 - Share on Facebook - Minor bug fixes. ### 1.0 — 2013-02-20 No release notes. ## Apps similar to PRA and HTN | App | Rating | Price | Category | | --- | --- | --- | --- | | [Neurology Examination & Review](https://appshunter.io/ios/app/neurology-examination-and-review/id6475799910) | — | $9.99 | Medical | | [EBMcalc Complete](https://appshunter.io/ios/app/ebmcalc-complete/id353427309) | 3.0 (3) | $9.99 | Medical | | [OCP Safety of immunotherapy](https://appshunter.io/ios/app/ocp-safety-of-immunotherapy/id6458191910) | — | Free | Medical | | [EHRA Key Messages](https://appshunter.io/ios/app/ehra-key-messages/id904950207) | 4.7 (28) | Free | Medical | | [epTools](https://appshunter.io/ios/app/eptools/id430201878) | 4.8 (495) | $19.99 | Medical | | [Insulin-Rx](https://appshunter.io/ios/app/insulin-rx/id764908870) | 4.7 (3) | Free | Medical | --- *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 2026-06-10.*