AV CPG vs Rythmo
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
AV CPG
This app provides clinical practice guidelines for paramedics and first responders. It offers up-to-date information to guide medical practice and is regularly reviewed for accuracy and relevance. The content is intended for professional use and not as general health advice.
- Clinical practice guidelines
- Up-to-date medical information
- Regularly reviewed content
- For paramedics and first responders
- Professional use only
Read full descriptionHide full description
The Ambulance Victoria (AV) Digital clinical practice guidelines (CPGs) contain clinical information to guide the practice of Ambulance Victoria Paramedics. AV CPGs are governed by the Medical Advisory Committee, and are regularly reviewed in response to emerging clinical evidence, staff feedback, and AV quality improvement requirements. DISCLAIMER These Clinical Practice Guidelines (CPGs) are expressly intended for use by Ambulance Victoria paramedics and first responders when performing duties and delivering ambulance services for, and on behalf of, Ambulance Victoria. Other users: The content of these CPGs is provided for information purposes only and is not intended to serve as health, medical or treatment advice. Ambulance Victoria does not represent or warrant that the content of these CPGs is accurate, reliable, up-to-date, complete or that the information contained in these CPGs is suitable for your needs or for any particular purpose. You are responsible for assessing whether the information is accurate, reliable, up-to-date, authentic, relevant or complete and where appropriate, seek independent professional advice. To the maximum extent permitted by law, Ambulance Victoria excludes liability (including liability in negligence) for any direct, special, indirect, incidental, consequential, punitive, exemplary or other loss, cost, damage or expense arising out of, or in connection with, use or reliance on these CPGs or any information contained in the CPGs (including without limitation any interference with or damage to a user’s computer, device, software or data occurring in connection with the CPGs or their use). These CPGs provide links to external websites. Ambulance Victoria does not control and accepts no liability for the content of those websites or for any direct, special, indirect, incidental, consequential, punitive, exemplary, or other loss, cost, damage or expense arising from use or reliance on those websites. Ambulance Victoria does not endorse any external website and does not warrant that they are accurate, authentic, reliable, up-to-date, relevant or complete. Your use of any external website is governed by the terms of that website. The provision of a link to an external website does not authorise you to reproduce, adapt, modify, communicate or in any way deal with the material on that site. If these CPGs contains links to your website and you have any objection to such links, please contact Ambulance Victoria at: clinicalguidelines@ambulance.vic.gov.au
Rythmo
Read full descriptionHide full description
Rythmo is a tap-per-breath respiratory rate counter. Watch the chest. Tap once for every breath you see. The first tap is breath one. Rythmo measures the gaps between your taps, takes the median interval, and converts that to breaths per minute. A rate appears from your second tap and sharpens with every tap after it. For paramedics, nurses, doctors, lifeguards, first aid responders and students. WHAT IT DOES Live tap-bpm. The rate comes from the median of your tap intervals, so one mistimed tap does not wreck the number. Intervals that sit far from the median are set aside rather than averaged in. Confidence indicator. Three levels, Low confidence, Settling and Confident, based on how consistent your taps have been. It reflects tap consistency, not clinical accuracy. Irregular flag. When the gaps between your taps vary widely, Rythmo says so, because a single median rate does not describe an irregular pattern well. Reference ranges. Seven age bands are listed at once, each marked in range or out of range against the current rate. There is no grading, no scoring and no interpretation beyond that. The paediatric ranges are as used in Australian prehospital practice, drawing on Royal Children's Hospital Melbourne guidelines, and the adult range is as in NEWS2 (Royal College of Physicians, 2017). The citation sits on the same screen as the table. Last 10 readings. Each one shows the time, the rate, how long it ran, the tap count and the final confidence. Kept on your device, and you can clear them whenever you want. Private by design. No account, no sign in, no analytics, no crash reporting, no ads. Rythmo makes no network calls and nothing from your readings leaves your device. Free, with no in-app purchases. Included for Apple Watch. The watch app runs on its own, with its own measure screen, age bands and history, and it does not need your iPhone nearby. Add it to your watch face as a complication and it opens on the measure screen in one tap. METHOD Tap-per-breath counting is described in the peer reviewed literature, beginning with Karlen and colleagues (PLoS One 2014;9(6):e99266) and the RRate app. Rythmo is written from the published description of that method. DISCLAIMER Rythmo is a reference and training tool. It reports a rate calculated from your own taps and displays published reference ranges for comparison. It does not diagnose, does not decide treatment, and does not replace your clinical assessment. Confirm every reading before you act on it or document it. For medical advice, diagnosis or treatment, consult a qualified healthcare professional. More at rythmo.com.au Privacy policy at rythmo.com.au/privacy
Screenshots
Verdict
The clearest difference is update cadence: Rythmo at every 6 days against AV CPG's every 2 months. AV CPG's advantage is iOS requirement (15.6 vs 17.0). 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
AV CPG ships an update every 2 months, Rythmo every 6 days. The most recent releases landed on November 2, 2026 and October 31, 2026 respectively.
| Parameter | AV CPG | Rythmo |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Positive reviews | 50.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 2 months | Every 6 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone, Apple Watch |
| Requires iOS | 15.6 — better | 17.0 |
| Further details — not scored | ||
| Size | 234 MB | 2 MB |
| Age rating | 17+ | 12+ |
| Developer | Ambulance Victoria | LACHLAN F D SALLABANK |
In-app purchases
AV CPG
No in-app purchases
Rythmo
No in-app purchases








