Comparison

Upper Respiratory Virtual Lab vs ABG Expert

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Upper Respiratory Virtual Lab

Explore upper airway anatomy in a 3D simulator. Access clinical information, photographs, and illustrations through tappable targets. Offers detailed views and easy navigation for a unique learning experience.

Highlights
  • 3D upper airway simulation
  • Tappable anatomical targets
  • Clinical information access
  • Detailed anatomical structure views
  • Cross-section overview
  • Free-range navigation
Features
Read full description

Overview: Explore the upper airway with a 3D simulator. The Upper Respiratory Virtual Lab forms a unique transition between book-learning and real-world experience by allowing users to study the anatomy in a 3-dimensional space. Tappable targets provide access to clinical information, photographs, and medical illustrations. Features: -See the anatomy from a unique perspective -View detailed information on 34 different anatomical structures -Cross-section showing an overview of the entire area -Free-range and instant transportation systems for easy navigation -Navigational head shows current location and orientation Controls: -Double-tap to move forward -Pinch out for precision movement -Pinch in to move backward -Single-finger swipe to rotate camera -Double-finger swipe to move vertically or horizontally -Two-finger roll to roll camera -Single-tap on a target to view name -Double-tap on a target to view detailed information

About

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.

Highlights
  • 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
Features
Read 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.

Screenshots

ABG Expert4 screens

Verdict

The call

The clearest difference is rating: ABG Expert at 4.8 against Upper Respiratory Virtual Lab's 4.4. ABG Expert also leads on update cadence (every 5 months vs every 20 months) and review sentiment (100% vs 84%). Upper Respiratory Virtual Lab's advantage is iOS requirement (11.0 vs 13.0). On price, ratings volume, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

ABG Expert holds the better App Store score, 4.8 against 4.4. Both are backed by a comparable volume of ratings — 8 and 9 respectively. Written reviews point the same way: 84% of Upper Respiratory Virtual Lab's written reviews are positive against 100% of ABG Expert's.

UpkeepUpdate frequency

Upper Respiratory Virtual Lab ships an update every 20 months, ABG Expert every 5 months. The most recent releases landed on June 5, 2026 and June 9, 2026 respectively.

Scorecard5 real differences · 5 level
Upper Respiratory Virtual Lab versus ABG Expert: the parameters behind the verdict, then further details
ParameterUpper Respiratory Virtual LabABG Expert
PriceFreeFree
Rating4.4 (8 ratings)4.8 (9 ratings) — better
Positive reviews84.2% of reviews100.0% of reviews — better
Number of ratings89 — better
Update frequencyEvery 20 monthsEvery 5 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPadiPhone, iPad, iPod — better
Requires iOS11.0 — better13.0
Further details — not scored
Size169 MB2 MB
Age rating12+12+
DeveloperAugusta UniversityBrian Dale Vander Werf MD Inc

Customer experience

Upper Respiratory Virtual Lab

All ratings8 ratings
Positive87.5%
Neutral0.0%
Negative12.5%
Written reviews19 reviews
Positive84.2%
Neutral5.3%
Negative10.5%

ABG Expert

All ratings9 ratings
Positive88.9%
Neutral11.1%
Negative0.0%
Written reviews3 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Upper Respiratory Virtual Lab

No in-app purchases

None

ABG Expert

No in-app purchases

Questions

Is Upper Respiratory Virtual Lab free?
Upper Respiratory Virtual Lab is free to download, with no in-app purchases.
Is ABG Expert free?
ABG Expert is free to download, with no in-app purchases.
Which has better reviews, Upper Respiratory Virtual Lab or ABG Expert?
ABG Expert is rated higher. Upper Respiratory Virtual Lab averages 4.4 out of 5 from 8 ratings, while ABG Expert averages 4.8 from 9 ratings.
Do Upper Respiratory Virtual Lab or ABG Expert have ads?
Neither Upper Respiratory Virtual Lab nor ABG Expert shows ads.
Which is updated more often, Upper Respiratory Virtual Lab or ABG Expert?
Upper Respiratory Virtual Lab ships an update every 20 months, and ABG Expert every 5 months. Most recently, Upper Respiratory Virtual Lab was updated on June 5, 2026 and ABG Expert on June 9, 2026.

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