# ABG Acid-Base eval > Stepwise ABG and electrolyte analysis tool for clinicians to diagnose acid-base disorders. (iPhone/iPad app by Joshua D. steinberg.) - Source: https://appshunter.io/ios/app/abg-acid-base-eval/id426019807 (this page in markdown: same URL + `.md`) - Developer: [Joshua D. steinberg](https://appshunter.io/developer/374154837) - Category: Medical - Price: Free - Rating: 4.60/5 from 7 App Store ratings · 28 written reviews indexed - Age rating: 17+ - Requires: iOS 13.0 · 1 MB - Languages: American English - Released: 2011-04-26 - Data updated: 2026-06-02 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/abg-acid-base-eval/id426019807/reviews.md ## What is ABG Acid? ABG Acid-Base eval walks a clinician through a stepwise approach to analyse ABG's and electrolytes in order to arrive at acid-base disorders and diagnostic ideas about ill patients. It is based mainly upon a worksheet developed by Dr. Erik Rupard from the medical literature. This tool not only yields answers, but just as importantly teaches the stepwise thinking process and the necessary concepts along the way. A clinician or learner will wind up with good information that assists patient care and should wind up a little smarter and more able to do it with less assistance the next time. It is a great support for those of us clinicians who use these tests only occasionally and don't have it memorized. The differential diagnoses include the classic mnemonics like MUDPILERS, CHAMPS, CLEVER PD, and HARDUPS, with explanations and examples. The app addresses such common questions as: * What are common causes of metabolic acidosis? respiratory alkalosis? * How do I calculate predicted pCO2? corrected bicarbonate? * What is the primary acid-base disorder? * Are additional acid-base disorders present, and if so, what are they? This app is written and intended for practicing clinicians like internists, family physicians, ER docs, cardiologists, pulmonologists, intensivists, and hospitalists; for resident physician trainees; for medical students; and of course for other clinician colleagues like NP's and PA's. As an educator and clinician, I am interested in feedback and I would be grateful for guidance on improving the tool. Notes of importance: - many thresholds and cutoffs are arbitrary and debatable, so you will have to use judgment to interpret which disorders are present and to what extent when suggested by the app - the app facilitates you to evaluate the data. If you make a mistake, the app will not argue with you. It will, at the end, offer to compare your work to the disorders that the app finds using the same algorithm - patients are more than the sums of their numbers and data, and they are often unique individuals. Use this information as a starting point in the evaluation of your patient and always do your own thinking! ## Key features - Stepwise ABG and electrolyte analysis - Identifies acid-base disorders - Provides diagnostic ideas - Teaches critical thinking process - Includes differential diagnoses mnemonics - Calculates predicted pCO2 and corrected bicarbonate ## Recent user reviews (10 of 28) All indexed reviews: https://appshunter.io/ios/app/abg-acid-base-eval/id426019807/reviews.md ### 5/5 — Great app *2025-06-03* Works really well ### 5/5 — Well done *2015-09-05* I'd prefer to input the numbers instead of turning a wheel, but overall it's a very useful app. ### 5/5 — Great app *2015-07-23* This is one of the good app that I found useful while I am in doubt. Accurate. ### 1/5 — Could be useful at work *2015-03-24* I can't really say if the app could be great because it freezes everytime I try to open it😠😞 ### 2/5 — Good app if you can get it to open! *2014-11-23* Used this app before ios8 update and loved it but since I updated my iPhone I can not get to open! :( Please update!! ### 1/5 — A waste if you have ios8 *2014-11-08, version 1.3* Does not work at all. ### 1/5 — Great idea *2014-10-30, version 1.3* But doesn't work, needs to be updated for ios8 ### 1/5 — Useless *2014-10-29, version 1.3* Completely unresponsive in ios8. ### 1/5 — saw work well...once *2014-10-16* My senior resident showed me this app and it worked great for him. naturally, I download it soon after. has yet to work once for me. The home screen comes on and I'm not able to hit buttons or change values. Hopefully this just needs to be updated for iOS8. ### 3/5 — iOS8 Incompatible *2014-10-05* Please update to be compatible with iOS 8 as I can’t use it on my iPhone 6. ## Frequently asked questions about ABG Acid ### What does the ABG Acid-Base eval app do? This app guides clinicians through a systematic approach to analyze Arterial Blood Gases (ABGs) and electrolytes. It helps identify acid-base disorders and generates diagnostic ideas for critically ill patients, while also teaching the underlying concepts and reasoning. ### What are the key features of this app? Key features include a stepwise analysis of ABGs and electrolytes, identification of primary and secondary acid-base disorders, calculation of predicted pCO2 and corrected bicarbonate, and the inclusion of classic differential diagnosis mnemonics with explanations. It focuses on teaching the analytical process. ### How much does the ABG Acid-Base eval app cost? Based on the provided information, the app is a paid application. It does not have in-app purchases or advertisements, indicating a one-time purchase model for access to its features. ### Who is the intended audience for this app? The app is designed for practicing clinicians such as internists, family physicians, ER doctors, cardiologists, pulmonologists, intensivists, and hospitalists. It is also intended for resident physician trainees, medical students, NPs, and PAs who regularly interpret ABGs and electrolytes. ### How does this app help with patient care? The app assists patient care by providing a structured method for analyzing complex ABG and electrolyte data, leading to more accurate diagnoses of acid-base disorders. By teaching the stepwise thinking process, it empowers clinicians to make better-informed decisions and potentially require less assistance in the future. ## Version history (last 5 releases) ### 1.7 — 2020-05-20 fixed dark mode problem causing electrolyte and blood gas entry to be invisible ### 1.6 — 2020-05-19 updated for more screen sizes, some elaboration on physiology concepts, but mostly the same ### 1.5 — 2017-04-17 - minor bug fix in rendering of lab value numbers on Step 5 screen - links to more apps for clinicians, students, residents, and health professionals ### 1.4 — 2015-02-09 works on iOS 8! finally! thanks for being patient ### 1.3 — 2011-10-24 minor correction in the algorithm where the app checks the user's work (step 7) ## Apps similar to ABG Acid | App | Rating | Price | Category | | --- | --- | --- | --- | | [ABG Expert](https://appshunter.io/ios/app/abg-expert/id885575488) | 4.8 (9) | Free | Medical | | [SCCM POC](https://appshunter.io/ios/app/sccm-poc/id1079591546) | 4.7 (110) | Free | Medical | | [Contraception Point-of-Care](https://appshunter.io/ios/app/contraception-point-of-care/id1212014869) | 5.0 (18) | Free | Medical | | [Sepsis Clinical Guide](https://appshunter.io/ios/app/sepsis-clinical-guide/id466952339) | 4.8 (304) | Free | Medical | | [ABGs NOW! 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User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-02.*