Comparison

RTB2 vs PFT Spirometry

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

Head to head
About

RTB2

This medical reference app provides respiratory therapists and students with essential clinical tools. It features ventilator mode guides, therapy calculators, and oxygen guidance in a clean, organized format for quick access in critical care settings.

Highlights
  • Ventilator mode reference guides
  • Respiratory therapy clinical calculators
  • Oxygen device guidance
  • Structured respiratory care information
  • Fast clinical review format
  • Advanced calculators (Pro)
Features
Read full description

RTβ₂ (RTB2) is a Respiratory Therapy reference and clinical toolset designed for Respiratory Therapists, respiratory therapy students, and healthcare professionals working in ICU and critical care environments. The app provides ventilator mode references, respiratory therapy calculators, oxygen therapy guidance, and structured respiratory care information in a clean, organized format designed for fast clinical review. The app provides organized access to commonly used Respiratory Therapy references, calculators, and ventilator information in a clean, structured format designed for quick navigation. RTB2 is built to help respiratory professionals review respiratory care concepts, ventilator modes, oxygen therapy guidance, and clinical calculations in one centralized resource. CORE FEATURES • Ventilator mode reference guides • Respiratory therapy clinical calculators • Oxygen device guidance and oxygen therapy reference • Organized respiratory care reference material • Clean layouts designed for fast navigation in clinical environments RTB2 PRO (Subscription) RTB2 Pro unlocks the full RTB2 toolset including advanced calculators, expanded Respiratory Therapy references, and ongoing clinical content updates. Pro features include: • Expanded ventilator mode explanations • Advanced respiratory therapy calculators • Expanded respiratory care reference material • Continuous updates and additional features as the platform evolves Designed for: • Respiratory Therapists • ICU and critical care clinicians • Healthcare professionals working with respiratory care • Students studying Respiratory Therapy RTB2 is intended for educational and informational purposes only. The content provided in this application is not intended to replace institutional protocols, physician orders, professional training, or clinical judgment. SUBSCRIPTION DETAILS RTB2 Pro is available as a monthly auto-renewable subscription. Payment will be charged to your Apple ID account at confirmation of purchase. Subscriptions automatically renew unless canceled at least 24 hours before the end of the current billing period. You can manage or cancel your subscription in your Apple ID account settings at any time. Privacy Policy https://rtb2.com/privacy Terms of Service https://rtb2.com/terms

About

PFT Spirometry

Features
Read full description

PFT & SPIROMETRY TOOL — EDUCATIONAL PATTERN REFERENCE FOR TRAINED CLINICIANS Built for pulmonary medicine residents, fellows, pulmonologists, and advanced medical learners who want a structured, guideline-aligned way to practice PFT pattern recognition—not a substitute for independent clinical judgment. Apply ERS/ATS interpretive strategies in one app: • ERS 2022+ interpretation (Z-score–forward, current ATS/ERS standard) • ERS pre-2022 interpretation (2005-era strategy for comparison and teaching) WHAT YOU CAN DO ▸ Discern physiologic patterns Enter spirometry, lung volumes, diffusion, and bronchodilator data. The app suggests obstructive, restrictive, mixed, and atypical patterns with severity grading—using transparent, guideline-based logic. ▸ Professional PDF outputs Generate clean, shareable PDF reports with findings, pattern summary, educational disclaimers, and a physician sign-off field—ideal for teaching conferences, case logs, and personal study records. Email directly from your device when Mail is configured. ▸ Dual-guideline learning Compare how the same data may be framed under current vs. prior ERS/ATS strategies—valuable for boards review, fellowship teaching, and understanding evolving standards. ▸ Educational differential reference (Premium) The Notes tab maps classic PFT patterns to commonly associated differential diagnoses (obstruction, restriction, mixed disorders, ILD, and more)—for manual study only. Pattern outputs do not auto-generate disease names; differentials are separated for educational clarity. ▸ Report library (Premium) Save, search, and re-export prior interpretations. De-identified labels only—do not enter patient identifiers. FREE VS PREMIUM Free: Disclaimers, regulatory information, subscription management, some content under Notes, and scroll preview of tools. Premium (7-day free trial, then auto-renewing subscription): • Full interpretation on both guideline tools • PDF generation and email send • Saved report history • Educational Notes & pattern-to-differential reference WHO THIS IS FOR Pulmonary & critical care fellows and residents Respirologists / pulmonologists refreshing pattern skills IM physicians with PFT interest Medical educators teaching spirometry interpretation NOT FOR patient self-diagnosis or unsupervised clinical decision-making. IMPORTANT — EDUCATIONAL USE ONLY This app is an educational pattern reference for qualified healthcare professionals. It is NOT a medical device, NOT FDA/Health Canada cleared, and NOT clinically validated. All outputs are preliminary educational suggestions requiring verification against the full PFT report, clinical context, imaging, and applicable guidelines. Not a diagnosis. Not for sole clinical decision-making. SUBSCRIPTION INFORMATION PFT Premium is an auto-renewable subscription (monthly or yearly). Payment is charged to your Apple ID account. Subscription automatically renews unless canceled at least 24 hours before the end of the current period. Your account will be charged for renewal within 24 hours prior to the end of the current period. Manage or cancel anytime in Settings → Apple ID → Subscriptions. Any free trial converts to a paid subscription unless canceled before the trial ends. Refunds are handled by Apple. Privacy Policy, Terms, and EULA are available in-app and at the URLs provided on the App Store listing: https://github.com/knispow/pft-privacypolicy/blob/main/README.md Guidelines referenced include ERS/ATS 2022 (Stanojevic et al.) and ERS/ATS 2005 interpretive strategies. Always consult primary literature and local standards of care.

Screenshots

RTB24 screens
PFT Spirometry4 screens

Verdict

The call

The clearest difference is update cadence: RTB2 at every 5 days against PFT Spirometry's every 2 weeks. RTB2 also leads on iOS requirement (15.1 vs 18). On price, ads, in-app purchases and device support 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. RTB2 sells 1 in-app purchase, starting at $2.99 per month and PFT Spirometry sells 2 in-app purchases, starting at $7.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

RTB2 ships an update every 5 days, PFT Spirometry every 2 weeks. The most recent releases landed on June 17, 2026 and September 12, 2026 respectively.

Scorecard2 real differences · 8 level
RTB2 versus PFT Spirometry: the parameters behind the verdict, then further details
ParameterRTB2PFT Spirometry
PriceFreeFree
Rating5.0 (2 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings2 — better—
Update frequencyEvery 5 days — betterEvery 2 weeks
AdsNoNo
In-app purchasesYesYes
MonetizationFreemium—
DevicesiPhone, iPodiPhone, iPad
Requires iOS15.1 — better18
Further details — not scored
Size46 MB8 MB
Age rating4+17+
DeveloperBbytetechworks LLCABHISHEK KUMAR

In-app purchases

1 purchases

RTB2

Subscriptions1
  • RTB2 Pro$2.991 Month
2 purchases

PFT Spirometry

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

Questions

Is RTB2 free?
RTB2 is free to download, with in-app purchases available.
Is PFT Spirometry free?
PFT Spirometry is free to download, with in-app purchases available.
Do RTB2 or PFT Spirometry have ads?
Neither RTB2 nor PFT Spirometry shows ads.
Which is updated more often, RTB2 or PFT Spirometry?
RTB2 ships an update every 5 days, and PFT Spirometry every 2 weeks. Most recently, RTB2 was updated on June 17, 2026 and PFT Spirometry on September 12, 2026.

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