Comparison

VentRef vs RTB2

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

Head to head
About

VentRef

A clinical reference tool for healthcare professionals managing mechanical ventilation and oxygen therapy. It provides information grounded in respiratory physiology and evidence-based critical care.

Highlights
  • Mechanical ventilation reference
  • Oxygen therapy reference
  • Respiratory physiology
  • Evidence-based critical care
  • Clinical decision support
Features
Read full description

VentRef is a focused clinical reference for clinicians managing invasive and noninvasive mechanical ventilation and oxygen therapy, grounded in core respiratory physiology and evidence-based critical care practice. This application is intended for educational and informational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Calculations and reference values are derived from published peer-reviewed medical literature and textbooks cited in the Sources section of the app. Always seek the guidance of a qualified healthcare professional with any questions regarding medical conditions or clinical decisions, and do not disregard or delay seeking professional advice because of information provided by this app. About Rishi Kumar, MD, FACC ("RK.MD") I'm an adult cardiothoracic anesthesiologist and cardiovascular ICU intensivist practicing in academic medicine. I'm passionate about teaching with free, open-access medical education. Learn more on my site: https://rk.md

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

Screenshots

VentRef4 screens
RTB24 screens

Verdict

The call

The clearest difference is in-app purchases: VentRef at none against RTB2's 1. VentRef also leads on ratings volume (42 vs 2). RTB2's advantage is update cadence (every 5 days vs every 3 weeks) and iOS requirement (15.1 vs 26.0). On price, rating, review sentiment and ads 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. VentRef asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for VentRef against 5.0 for RTB2. That said, the two scores are not equally well evidenced: VentRef has 42 ratings behind it against 2, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

VentRef ships an update every 3 weeks, RTB2 every 5 days. The most recent releases landed on September 23, 2026 and June 17, 2026 respectively.

Scorecard5 real differences · 5 level
VentRef versus RTB2: the parameters behind the verdict, then further details
ParameterVentRefRTB2
PriceFreeFree
Rating5.0 (42 ratings)5.0 (2 ratings)
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings42 — better2
Update frequencyEvery 3 weeksEvery 5 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFreemium
DevicesiPhone, iPadiPhone, iPod
Requires iOS26.015.1 — better
Further details — not scored
Size27 MB46 MB
Age rating17+4+
DeveloperRishi KumarBbytetechworks LLC

Customer experience

VentRef

All ratings42 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews3 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

RTB2

Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

VentRef

No in-app purchases

1 purchases

RTB2

Subscriptions1
  • RTB2 Pro$2.991 Month

Questions

Is VentRef free?
VentRef is free to download, with no in-app purchases.
Is RTB2 free?
RTB2 is free to download, with in-app purchases available.
Which has better reviews, VentRef or RTB2?
VentRef and RTB2 are both rated 5.0 out of 5 on the App Store, from 42 and 2 ratings respectively.
Do VentRef or RTB2 have ads?
Neither VentRef nor RTB2 shows ads.
Which is updated more often, VentRef or RTB2?
VentRef ships an update every 3 weeks, and RTB2 every 5 days. Most recently, VentRef was updated on September 23, 2026 and RTB2 on June 17, 2026.

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