Comparison

ODC Tutor vs ShockRef

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

Head to head
About

ODC Tutor

Visualize and understand the oxygen-hemoglobin dissociation curve. This medical tool shows the relationship between oxygen partial pressure and hemoglobin saturation, highlighting factors that shift the curve and critical care points.

Highlights
  • Visualize oxygen-hemoglobin dissociation curve
  • Shift curve right/left to show affinity changes
  • Display causes for curve shifts
  • Show arterial and venous saturation
  • Indicate P50 value
  • Highlight ICU point for critical care monitoring
Features
Read full description

Title: The ODC App: A Guide to Understanding the Oxygen-Hemoglobin Dissociation Curve Introduction: The ODC app is a medical tool that allows users to visualize and understand the oxygen-hemoglobin dissociation curve, an essential concept in respiratory physiology. Developed by a team of medical professionals, this app offers a user-friendly interface that displays the relationship between partial pressure of oxygen (ODC's horizontal axis) and hemoglobin saturation (ODC's vertical axis) in a sigmoid curve. Features: The app's normal sigmoid curve can be shifted to the right or left, indicating the decreased and increased affinity of hemoglobin to oxygen, respectively. The app also displays the causes for the shift in the curve, helping users understand the factors that affect hemoglobin saturation. The application shows the fall in saturation of hemoglobin as the blood moves from the arterial to venous end, and the oscillating cursor indicates the heart rate which can be changed. The app displays both arterial and venous saturation and provides P50 value, which denotes the partial pressure of oxygen at which hemoglobin is 50% saturated (marked in the application). The ICU point is an important feature that the app highlights. It marks the point where partial pressure of oxygen of 60 mm Hg corresponds to a hemoglobin saturation of 90%. At this point, a small drop in pressure leads to rapid drops in saturation, indicating the need for close monitoring in critical care settings. Team Behind the App: The ODC app was developed by a team of medical professionals, including Dr. Satish Deopujari, a Professor Emeritus at Govt. Medical College Nagpur IGGMC, Adjunct Professor in Mechanical Engineering at VNIT Nagpur, Chairman Academics at Nelson Hospital Nagpur, Founder Chairman of the National Pediatric Intensive chapter, and President of the Society of Pediatric Cardiac Critical Care in Chandigarh. Dr. Lawrence Martin, Dr. Vivek Shivhare, and Dr. Shruti Deopujari were also part of the development team. Their collective experience in the medical field has contributed to the development of medical education and research in India. Dr. Satish Deopujari Dr. Lawrence Martin Dr. Vivek Shivhare Dr. Shruti Deopujari Disclaimer: The ODC app is based on literature and formulas available publicly in the medical domain. The content displayed is intended for knowledge purposes and is a guide only. It does not replace or substitute for any professional medical institute or educational organization. Sources: The ODC app is based on the following sources: Title: "Respiratory Physiology: The Essentials" Author: John B. West Year: 2004 Link: https://scholar.google.com/scholar_lookup?title=Respiratory%20Physiology%3A%20The%20Essentials&author=JB%20West&publication_year=2004&book=Respiratory%20Physiology%3A%20The%20Essentials Title: "Oxygen-haemoglobin dissociation curve: understanding the significance in cardiopulmonary resuscitation" Authors: Priya Rudingwa, Jay Prakash, and Anil Kumar Patil Year: 2018 Link: https://www.sciencedirect.com/science/article/pii/S1743181617306066?via%3Dihub Title: "The effects of hypoxia on human health and performance" Authors: J.R. Sutton and P.J. Reeves Year: 1992 Link: https://pubmed.ncbi.nlm.nih.gov/1465759/ Conclusion: The ODC app is an excellent resource for medical professionals, students, and enthusiasts who want to understand the complex relationship between oxygen and hemoglobin saturation. It is easy to use and provides a comprehensive visual representation of the ODC. Whether you are in a critical care setting or simply curious about respiratory physiology, the ODC app is a must-have tool that provides a simple and effective way to learn about this essential topic. So, apply, enjoy, and learn with the ODC app!

About

ShockRef

A clinical reference for managing shock and hemodynamics, offering insights into bedside physiology, resuscitation, and mechanical circulatory support. It includes practical calculators and drug references for critical care professionals and students.

Highlights
  • Shock phenotyping
  • Resuscitation workflows
  • Vasoactive drug references
  • Mechanical circulatory support troubleshooting
  • Physiology-based critical care
  • Practical calculators
Features
Read full description

ShockRef is a focused educational reference for clinicians and learners managing shock, hemodynamics, vasoactive therapy, and temporary mechanical circulatory support. It integrates bedside physiology, shock phenotyping, resuscitation workflows, monitoring pitfalls, drug references, MCS troubleshooting, source citations, and practical calculators for structured, physiology-based critical care. This app is intended for educational and informational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you may have regarding a medical condition, and never 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

Screenshots

ODC Tutor4 screens
ShockRef4 screens

Verdict

The call

The clearest difference is update cadence: ShockRef at every 4 days against ODC Tutor's every 2 months. ODC Tutor's advantage is iOS requirement (13.0 vs 26.0). On price, ads, in-app purchases and monetization model 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.

UpkeepUpdate frequency

ODC Tutor ships an update every 2 months, ShockRef every 4 days. The most recent releases landed on October 21, 2026 and October 24, 2026 respectively.

Scorecard2 real differences · 8 level
ODC Tutor versus ShockRef: the parameters behind the verdict, then further details
ParameterODC TutorShockRef
PriceFreeFree
Rating—5.0 (8 ratings) — better
Positive reviews100.0% of reviews—
Number of ratings—8 — better
Update frequencyEvery 2 monthsEvery 4 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS13.0 — better26.0
Further details — not scored
Size8 MB15 MB
Age rating17+17+
DeveloperSatish DeopujariRishi Kumar

Customer experience

ODC Tutor

Written reviews9 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

ShockRef

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

ODC Tutor

No in-app purchases

None

ShockRef

No in-app purchases

Questions

Is ODC Tutor free?
ODC Tutor is free to download, with no in-app purchases.
Is ShockRef free?
ShockRef is free to download, with no in-app purchases.
Do ODC Tutor or ShockRef have ads?
Neither ODC Tutor nor ShockRef shows ads.
Which is updated more often, ODC Tutor or ShockRef?
ODC Tutor ships an update every 2 months, and ShockRef every 4 days. Most recently, ODC Tutor was updated on October 21, 2026 and ShockRef on October 24, 2026.

Other comparisons