Comparison

ETCO2 Tutor vs Respiratory Notes

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

Head to head
About

ETCO2 Tutor

Learn about End-tidal CO2 (ETCO2) and its significance in monitoring patient respiration. This app visualizes ETCO2 graphs for various conditions like apnea, hyperventilation, and hypoventilation, aiding in understanding capnography.

Highlights
  • ETCO2 monitoring explanation
  • Capnography and capnograph details
  • Apnea graph visualization
  • Hyperventilation graph visualization
  • Hypoventilation graph visualization
  • Graphs for various medical conditions
Features
Read full description

ETCO2 (End-tidal CO2) is the level of carbon dioxide released at the end of an exhaled breath (expiration). Carbon dioxide (CO2) reflects cardiac output and pulmonary blood flow as the gas is transported by the venous system to the heart and then pumped to the lungs. CO2 concentration reaches a maximum at the end of exhalation. When CO2 diffuses out of the lungs into the exhaled air, the partial pressure or maximal concentration of the gas at the end of exhalation can be measured. ETCO2 is this measured value. It’s vital to be able to monitor and measure ETCO2 because changes in carbon dioxide levels can indicate hypoxia, a pathological condition in which a region of the body (or the body as a whole) is deprived of oxygen. If hypoxia occurs, irreversible brain damage can be the result. ETCO2 a very important value to monitor. A high ETCO2 reading in a patient with altered mental status or severe difficulty breathing may indicate hypoventilation and a possible need for the patient to be intubated. Low ETCO2 readings on patients may indicate hyperventilation. ETCO2 in Capnography and Capnographs: Capnography is the process of monitoring carbon dioxide (specifically ETCO2) in exhaled breath. The working mechanisms used to perform capnography are called capnographs. The ETCO2 app helps develop the knowledge about ETCO2 and various capnographs, and can be a useful tool for learning. The App shows the graphs for Apnea, Hyperventilation and Hypoventilation. It also shows capnographs for various medical conditions which are encountered treatment.

About

Respiratory Notes

This app provides a comprehensive, procedure-based reference for respiratory therapy information. It includes illustrations, forms, and algorithms to aid in study and practice, with content organized around protocols and new pulmonary disease tabs. An in-app purchase unlocks all content, and a subscription offers continuous updates.

Highlights
  • Procedure-based format
  • Supporting illustrations and tables
  • Fill-in-the-blank forms
  • Algorithms based on AARC Guidelines
  • SmartSearch technology
  • Offline content access
Features
Read full description

"Try before you buy"" - Download the FREE App, which includes sample content. An in-App purchase is required to unlock all content.   Procedure-based format, all the respiratory therapy information you need at your fingertips. Respiratory Notes: Respiratory Therapist's Pocket Guide a quick-reference tool that put all the respiratory therapy information you need at your fingertips. The procedure-based format includes supporting illustrations, fill-in-the-blank forms, and algorithms to help you study and guide you in practice. Key Features * Bullet-point reviews guide you through procedures. * Quick-scan illustrations and tables summarize data. * Algorithms are based on AARC Clinical Practice Guidelines. * Key forms allow you to gather data at the bedside, and then transcribe to conventional charts New to this Edition * NEW! Pulmonary Disease and Airway/Ventilation Tabs * NEW! Comprehensive index * UPDATED! Procedures now organized around protocols No internet connection is required to access the content after the initial download. Find information quickly using powerful SmartSearch technology. Search part of term for those hard to spell medical terms. Content licensed from printed ISBN 10: 0803629222 Content licensed from printed ISBN 13: 9780803629226 SUBSCRIPTION : Please choose an auto renewable subscription plan to receive content access & continuous updates. Your subscription automatically renews as per your plan, so you always have the latest content.   Yearly auto-renewing payments - $29.99   Payment will be charged to your iTunes Account at confirmation of purchase. Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period. Subscription may be managed by the user & auto-renewal can be disabled at any time by going to your device “Settings” and tapping “iTunes & App Store”. Any unused portion of a free trial period will be forfeited when you purchase a subscription, where applicable.   If you have any questions or comments, email us any time: customersupport@skyscape.com or call 508-299-30000   Privacy Policy-https://www.skyscape.com/terms-of-service/privacypolicy.aspx Terms and Conditions-https://www.skyscape.com/terms-of-service/licenseagreement.aspx   Editor(s):  Gary C. White MEd RRT RPFT Publisher: F. A. Davis Company

Screenshots

ETCO2 Tutor3 screens
Respiratory Notes4 screens

Verdict

The call

The clearest difference is rating: ETCO2 Tutor at 5.0 against Respiratory Notes's 4.0. ETCO2 Tutor also leads on in-app purchases (none vs 1) and ads (none vs shown). On price, ratings volume, update cadence 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. Respiratory Notes sells 1 in-app purchase, starting at $39.99 per year. ETCO2 Tutor asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

ETCO2 Tutor holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 2 and 4 respectively.

UpkeepUpdate frequency

ETCO2 Tutor ships an update every 5 months, Respiratory Notes every 6 months. The most recent releases landed on October 4, 2026 and September 30, 2026 respectively.

Scorecard5 real differences · 5 level
ETCO2 Tutor versus Respiratory Notes: the parameters behind the verdict, then further details
ParameterETCO2 TutorRespiratory Notes
PriceFreeFree
Rating5.0 (2 ratings) — better4.0 (4 ratings)
Positive reviews100.0% of reviews—
Number of ratings24 — better
Update frequencyEvery 5 months — betterEvery 6 months
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS7.0 — better13.0
Further details — not scored
Size33 MB47 MB
Age rating17+17+
DeveloperSatish DeopujariSkyscape Medpresso Inc

Customer experience

ETCO2 Tutor

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Respiratory Notes

All ratings4 ratings
Positive75.0%
Neutral0.0%
Negative25.0%

In-app purchases

None

ETCO2 Tutor

No in-app purchases

1 purchases

Respiratory Notes

Subscriptions1
  • Respiratory Notes$39.991 Year

Questions

Is ETCO2 Tutor free?
ETCO2 Tutor is free to download, with no in-app purchases.
Is Respiratory Notes free?
Respiratory Notes is free to download, with in-app purchases available.
Which has better reviews, ETCO2 Tutor or Respiratory Notes?
ETCO2 Tutor is rated higher. ETCO2 Tutor averages 5.0 out of 5 from 2 ratings, while Respiratory Notes averages 4.0 from 4 ratings.
Do ETCO2 Tutor or Respiratory Notes have ads?
Respiratory Notes shows ads; ETCO2 Tutor does not.
Which is updated more often, ETCO2 Tutor or Respiratory Notes?
ETCO2 Tutor ships an update every 5 months, and Respiratory Notes every 6 months. Most recently, ETCO2 Tutor was updated on October 4, 2026 and Respiratory Notes on September 30, 2026.

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