Comparison

ABG Pro DDx vs PFT Spirometry

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

Head to head
About

ABG Pro DDx

Features
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Arterial Blood Gas Pro DDx. Ad supported. * Great tool for nurses, doctors and medical students * A-a Gradient Calculator * Interprets Arterial Blood Gas and Osmolar Gap including triple acid base problems. * Provides differential diagnosis of each disorder in your Arterial Blood Gas and Osmolar Gap. * Allows you to define Normal pCO2 and Bicarb range for ABG [Arterial Blood Gas] interpretation. * Corrects Anion Gap for Albumin(ie Albumin g/dL x 2.5 = normal AG) in the ABG [Arterial Blood Gas] values. * Calculates Anion Gap, Osmolar Gap, Delta Delta, Expected PCO2 and Expected Bicarb. This ABG [Arterial Blood Gas] and Osmolar Gap app has be "stress tested" against 100+ triple-acid base problems. This app has been developed by a ABIM Certified Internal Medicine Physician in the US and calculations are based on: Interpretation of arterial blood gas. Pramod Sood, Gunchan Paul, and Sandeep Puri (Indian J Crit Care Med. 2010 Apr-Jun; 14(2): 57 - 64) This application is for ABG [Arterial Blood Gas] and Osmolar Gap informational/educational purposes only. Please do not use to guide actual patient care and real life ABG interpretation. I take no responsibility for incorrect answers. Please notify me ASAP if do see incorrect answers in the ABG interpretation so that I may fix them. Please rate highly if you like the app.

About

PFT Spirometry

Features
Read full description

Make sense of pulmonary function testsβ€”one pattern at a time. PFT Spirometry helps clinicians and medical learners practise PFT interpretation, compare the 2022 and 2005 ERS/ATS frameworks, and build clear reports for teaching and study. FROM VALUES TO A CLEAR PATTERN Enter spirometry, lung volumes, gas-transfer and bronchodilator measurements. Start with the pattern, then review relevant parameters, applicable severity grading and important gaps in the supplied data. Explore obstruction, restriction, mixed patterns and preserved-ratio abnormalities in one focused workspace. TWO FRAMEWORKS, ONE LEARNING TOOL Use PFTs 2022 for the 2022 interpretive framework or PFTs 2005 for the earlier strategy. Compare approaches while studying lung function, reviewing older reports or preparing for pulmonary medicine teaching and examinations. Enter the reference values supplied by the source laboratory. LESS TYPING WITH PHOTO IMPORT (BETA) Scan a report with the camera, choose a photo or open a PDF page. Native on-device recognition suggests values for review. Crop or rotate the table, compare suggestions with the source, correct entries and apply reviewed values before tapping Interpret. Recognition varies with image quality and layout; it may omit or misread values. Visual verification is required. REPORTS THAT KEEP THE DETAILS TOGETHER Create one-page PDF reports with raw values as entered, findings, the pattern summary, notes and educational limitations. Save, label, search and revisit reports for learning. Copy results or share a PDF using your device's sharing options. Use de-identified teaching cases. A SEARCHABLE PFT REFERENCE Open focused, collapsible Notes topics covering reference limits, spirometry quality, ventilatory patterns, bronchodilator response, lung volumes, DLCO, VA/KCO and interpretation pitfalls. Clinical context and differential considerations stay in Notes, separate from the tools' algorithmic pattern output. Follow linked primary references for further reading. MADE FOR FOCUSED STUDY A compact interface, optional slider inputs and adjustable text size help you work at your preferred pace on iPhone or iPad. Interpretation and report storage run locally; no app account is required. Imported images are not attached to saved reports or uploaded to a developer-operated recognition service. FREE AND PREMIUM Free access includes most Notes topics, reading preferences, educational-use information and previews of the tools. PFT Premium unlocks both interpretation tools, photo import (Beta), PDF export, saved report history and all Notes topics. Monthly and yearly auto-renewing plans are available. Prices and any eligible introductory trial are shown before purchase. EDUCATIONAL USE For qualified healthcare professionals and medical learners under appropriate supervision. Outputs are algorithmic educational pattern suggestions, not diagnoses or treatment advice. They may be incomplete or incorrect and require independent verification by a qualified clinician against the original report, test quality, clinical context and applicable standards. Not for patient self-diagnosis or use as the sole basis for clinical decisions. SUBSCRIPTIONS Payment is charged to your Apple Account. Subscriptions renew automatically unless cancelled at least 24 hours before the current period ends. Any eligible trial renews at the displayed subscription price unless cancelled. Manage or cancel in your device's subscription settings. Restore Purchases is available in the app. Privacy Policy: https://github.com/knispow/pft-privacypolicy/blob/main/README.md Apple Standard EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

ABG Pro DDx4 screens
PFT Spirometry4 screens

Verdict

The call

The clearest difference is in-app purchases: ABG Pro DDx at none against PFT Spirometry's 2. ABG Pro DDx also leads on iOS requirement (15.0 vs 26.0). PFT Spirometry's advantage is update cadence (every 2 months vs every 20 months). On price, ads and device support there is nothing between them.

Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. PFT Spirometry sells 2 in-app purchases, starting at $7.99 per month. ABG Pro DDx asks for nothing beyond the download.

UpkeepUpdate frequency

ABG Pro DDx ships an update every 20 months, PFT Spirometry every 2 months. The most recent releases landed on October 27, 2026 and October 24, 2026 respectively.

Scorecard3 real differences Β· 3 level
ABG Pro DDx versus PFT Spirometry: the parameters behind the verdict, then further details
ParameterABG Pro DDxPFT Spirometry
PriceFreeFree
Update frequencyEvery 20 monthsEvery 2 months β€” better
AdsNoNo
In-app purchasesNo β€” betterYes
DevicesiPhone, iPad, iPod β€” betteriPhone, iPad
Requires iOS15.0 β€” better26.0
Further details β€” not scored
Size6 MB3 MB
Age rating17+17+
DeveloperGDA SoftwareABHISHEK KUMAR

In-app purchases

None

ABG Pro DDx

No in-app purchases

2 purchases

PFT Spirometry

Subscriptions2
  • PFT Premium Monthly7 Days trial$7.991 Month
  • PFT Premium Yearly7 Days trial$79.991 Year

Questions

Is ABG Pro DDx free?
ABG Pro DDx is free to download, with no in-app purchases.
Is PFT Spirometry free?
PFT Spirometry is free to download, with in-app purchases available.
Do ABG Pro DDx or PFT Spirometry have ads?
Neither ABG Pro DDx nor PFT Spirometry shows ads.
Which is updated more often, ABG Pro DDx or PFT Spirometry?
ABG Pro DDx ships an update every 20 months, and PFT Spirometry every 2 months. Most recently, ABG Pro DDx was updated on October 27, 2026 and PFT Spirometry on October 24, 2026.

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