Comparison

ODC Tutor vs Rapid Log

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

Rapid Log

This app helps critical care transport teams and emergency department providers quickly log medications, interventions, and timeline events in real-time. It offers one-tap logging, CPR timers, and medication tracking to support patient care without distraction. Designed for high-acuity environments, it aids in post-call documentation accuracy.

Highlights
  • One-tap event logging
  • CPR timer and workflow support
  • Fast medication tracking
  • Apple Watch integration
  • Customizable workflow
  • Call history and timeline review
Features
Read full description

Rapid Log: CCT Edition is built for flight crews, critical care transport teams, and emergency department providers who need fast, reliable event tracking when seconds matter. Designed for cognitive offloading in high-acuity environments, Rapid Log helps clinicians capture medications, interventions, procedures, and critical timeline events in real time—without breaking focus on patient care. Whether you're managing a complex interfacility transport, a critically ill patient, or a cardiac arrest, Rapid Log provides a simple, distraction-free way to track what happened and when it happened. KEY FEATURES • One-Tap Event Logging Quickly capture procedures, interventions, and key moments with customizable event buttons. • CPR Timer & Workflow Support Track compression cycles, pulse checks, shocks, ROSC, and other critical CPR events with integrated timing tools. • Fast Medication Tracking Document medication administration, titrations, and boluses in just a few taps. • Apple Watch Integration Log events, manage CPR timing, and interact with your call directly from your wrist. • Customizable Workflow Configure event buttons and layouts to match your clinical practice, protocols, and personal preferences. • Call History & Timeline Review Review completed calls with accurate timestamps to support recall and post-call documentation. • Documentation Workflow Support Mark completed charting items as documented to help track progress while completing your ePCR. IDEAL FOR • Flight Paramedics • Flight Nurses • Critical Care Transport (CCT) Teams • Emergency Department Providers • High-Acuity EMS Systems WHY RAPID LOG? During critical patient encounters, clinicians are constantly balancing patient care, communication, medications, procedures, and documentation requirements. Rapid Log provides cognitive offloading by helping crews capture important events as they occur, reducing reliance on memory and improving documentation accuracy after the call. Built by a provider, for providers, Rapid Log is designed around real-world workflows in demanding clinical environments. IMPORTANT Rapid Log is an event tracking and workflow support tool. It is not intended to replace official patient care documentation. This app is not HIPAA compliant. Do not enter patient-identifiable information. Always follow your agency's policies, documentation standards, and local regulations.

Screenshots

ODC Tutor4 screens
Rapid Log4 screens

Verdict

The call

The clearest difference is price: ODC Tutor at Free against Rapid Log's $6.99. ODC Tutor also leads on iOS requirement (13.0 vs 26.1). On update cadence, 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

ODC Tutor is free to download; Rapid Log costs $6.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

ODC Tutor ships an update every 2 months, Rapid Log every 5 weeks. The most recent releases landed on October 21, 2026 and October 9, 2026 respectively.

Scorecard3 real differences · 7 level
ODC Tutor versus Rapid Log: the parameters behind the verdict, then further details
ParameterODC TutorRapid Log
PriceFree — better$6.99
Rating—5.0 (1 ratings) — better
Positive reviews100.0% of reviews—
Number of ratings—1 — better
Update frequencyEvery 2 monthsEvery 5 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree — betterPaid
DevicesiPhone, iPad, iPod — betteriPhone, Apple Watch
Requires iOS13.0 — better26.1
Further details — not scored
Size8 MB4 MB
Age rating17+4+
DeveloperSatish DeopujariNicholas Keene

Customer experience

ODC Tutor

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

Rapid Log

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

ODC Tutor

No in-app purchases

None

Rapid Log

No in-app purchases

Questions

Is ODC Tutor free?
ODC Tutor is free to download, with no in-app purchases.
Is Rapid Log free?
Rapid Log costs $6.99, with no in-app purchases.
Do ODC Tutor or Rapid Log have ads?
Neither ODC Tutor nor Rapid Log shows ads.
Which is updated more often, ODC Tutor or Rapid Log?
ODC Tutor ships an update every 2 months, and Rapid Log every 5 weeks. Most recently, ODC Tutor was updated on October 21, 2026 and Rapid Log on October 9, 2026.

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