ABG Expert vs ABG Book
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ABG Expert
This medical tool provides accurate and flexible acid-base analysis for healthcare professionals. It offers detailed explanations, customizable ranges, and advanced features like anion gap correction and A-a gradient adjustments for various patient conditions and locations.
- Validated accuracy with real-world testing
- Plausibility checks for physiologically impossible data
- Automatic anion gap correction with albumin
- Detailed explanations with equations
- Separate or combined analysis of ABG, anion gap, A-a gradient
- Customizable normal ranges for anion gap and delta gap
- Age and barometric pressure adjustments for A-a gradient
- Support for SI and non-SI units
- Color-coded results and differential diagnoses
- Adjustments for chronic respiratory conditions
Read full descriptionHide full description
ABG Expert™ is simply the best acid-base analysis tool with features available in no other app. Designed and tested by practicing physicians, ABG Expert is trusted by medical professionals for unparalleled accuracy, flexibility, and power while remaining completely intuitive to use. Whether you are a physician, nurse, respiratory therapist, paramedic, or student, ABG Expert is your ideal acid base analysis app. Accuracy- • ABG Expert has been validated using extensive testing under real-world conditions. • No need to worry about entering physiologically impossible data by mistake. Data is checked for plausibility and for internal consistency using the Henderson-Hasselbalch equation. • An accurate analysis depends on an accurate anion gap. ABG Expert has you covered with automatic correction of the anion gap when albumin is provided. • Never again wonder about how a result was obtained. Detailed explanations include easy-to-understand equations so you can be sure the calculations are correct. Flexibility- • Need the arterial blood gas analysis, but not the anion gap or A-a gradient? No problem. ABG Expert can analyze the data for all three results separately or together. • Set the normal anion gap range based on the normal range at your institution. Or, use your patient’s own baseline anion gap to maximize your sensitivity to detect disorders. • Caring for an 80-year-old patient in Denver? Provide age and barometric pressure, and ABG Expert automatically adjusts interpretation of the A-a gradient. • Need more specificity? Adjust the normal delta gap range based on the literature you follow in your practice. • ABG Expert works as well in Bangkok as it does in Boston with full support for SI and non-SI units. Power- • Color-coded results allow for rapid analysis in critical situations. One additional click gives you a detailed differential diagnosis and additional recommendations. • Concerned about a new problem in your patient with advanced COPD? ABG Expert can adjust its calculations for chronic respiratory conditions so you can detect additional disorders that are missed by other apps. • Detailed explanations of disorders integrate ABG, anion gap, and A-a gradient results providing individualized answers like no textbook can. • Refine your differential diagnosis even further with the included osmolal gap and urine anion gap calculators. • ABG Expert combines beauty and brains with optimization for iOS devices running iOS 13 and later. Disclaimer: Brian Dale Vander Werf MD Inc. has made every effort to ensure the accuracy of the information included in this product. However, the authors, developers, and Brian Dale Vander Werf MD Inc. are not responsible for errors or omissions or for any consequences from the use of this product and make no warranty, expressed or implied, with respect to the currency, completeness, or accuracy of the contents of this product. This product has been designed as a supplemental source of information for medical professionals. This product is not a substitute for clinical judgment, and the use of the information produced by this product in a particular situation remains the responsibility of the medical professional. Privacy Policy: This product does not collect, store, or transmit individually identifiable health information. References: NEJM. 2014; 371: 1434. Medicine. 1980; 59(3): 161. Kidney International. 2009; 76: 1239. Emerg Med. 1990; 19: 1310. Clin J Am Soc Nephrol. 2007; 2: 162. Nat Rev Nephrol. 2010; 6: 274. Anaesthesia. 2008; 63: 294. Clin J Am Soc Nephrol. 2012; 7: 671. The ICU Book. 3rd ed. Lippincott Williams & Wilkins; 2007.
ABG Book
This interactive book simplifies the complex topic of ACID-BASE balance through dynamic learning. It integrates graphics and equations to provide in-depth understanding and can be used as a teaching tool.
- Interactive ACID-BASE balance learning
- Dynamic pH and HH equation understanding
- Integration of graphics with equations
- In-depth ABG graphics knowledge
- Futility of Bicarbonate in diagnosis
- ABG tutor for presentations
Read full descriptionHide full description
This is a Complete and Interactive Book created with the purpose of simplifying the understanding of ACID-BASE balance, which is a relatively complex topic and is been a class example of academic terrorism. Aim of the APP Book: 1. Facilitate simultaneous learning of Acid- Base diagnosis and understanding the mechanism while playing with the App. 2. Understanding the fundamentals of the concept of pH in a dynamic format. 3. Understanding the dynamics of HH equation in a unique way. 4. Integration of Graphics and HH equation in an interactive form, helping user get in-depth knowledge and understanding of ABG Graphics. 5. Understanding the futility of Bicarbonate in Acid: Base diagnosis as Bicarbonate is a calculated parameter and is a product of CO2 and pH. 6. Teaching ABG by using this App: ABG tutor can be used for teaching Acid-Base by using smartphone, just attach the phone to the projector by a suitable adapter and you are ready for presentation!!! Happy learning. Concept and Authors: Dr Satish Deopujari Dr Lawrence Martin Dr Vivek Shivhare Dr Shruti Deopujari Dr Edward H. Karotkin Visit deopujari.com for more details About RoundGlass Blossom: RoundGlass Blossom is committed to enable every caregiver to run a smarter practice and deliver superior care to their patients. RoundGlass Blossom offers a comprehensive suite of solutions comprising of medical, educational and practice management applications designed to help caregiver at every step of medical practice to deliver best care. To know more, write to us at: rgblossom@round.glass. Disclaimer: This app is based on equations available publicly in Medical domain. The information contained on this app is intended for educational purposes only. It does not constitute medical advice. You should consult a physician regarding medical diagnosis or treatment.
Screenshots
Verdict
The clearest difference is update cadence: ABG Book at every 5 days against ABG Expert's every 5 months. ABG Book also leads on rating (5.0 vs 4.8) and iOS requirement (9.0 vs 13.0). ABG Expert's advantage is ratings volume (9 vs 1). On price, review sentiment, ads and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
ABG Book holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: ABG Expert has 9 ratings behind it against 1, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.
ABG Expert ships an update every 5 months, ABG Book every 5 days. The most recent releases landed on October 20, 2026 and October 24, 2026 respectively.
| Parameter | ABG Expert | ABG Book |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (9 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 9 — better | 1 |
| Update frequency | Every 5 months | Every 5 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 13.0 | 9.0 — better |
| Further details — not scored | ||
| Size | 2 MB | 41 MB |
| Age rating | 12+ | 4+ |
| Developer | Brian Dale Vander Werf MD Inc | Satish Deopujari |
Customer experience
ABG Expert
ABG Book
In-app purchases
ABG Expert
No in-app purchases
ABG Book
No in-app purchases
Questions
Is ABG Expert free?
Is ABG Book free?
Which has better reviews, ABG Expert or ABG Book?
Do ABG Expert or ABG Book have ads?
Which is updated more often, ABG Expert or ABG Book?
Other comparisons















