Ether vs Periop Pacemaker
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Ether
This medical app provides anesthesiologists with easy access to essential practice information. It offers features like telephone directories and physician contact information, with some content restricted to authenticated Stanford affiliates.
- Anesthesiology practice information
- Stanford clinical facility directories
- Physician contact information
- Built-in text paging
- Access for Stanford affiliates
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Ether is an application designed by the Stanford Anesthesia Informatics and Media (AIM) Lab to support the work, education and training of anesthesiologists at the Stanford University School of Medicine. The application allows easy access to information relevant to the practice of anesthesiology. Please note access to some content is restricted to Stanford-authenticated affiliates. Telephone directories to Stanford clinical facilities and a directory of physician contact information and built-in text paging are also available to Stanford-authenticated affiliates. The application is primarily designed for affiliates of the Stanford University School of Medicine. For more information about the Stanford AIM lab and our other projects, please visit our website at http://aim.stanford.edu.
Periop Pacemaker
This app provides medical professionals with a decision algorithm for managing surgical patients with implantable defibrillators or pacemakers. It is based on guidelines endorsed by the Heart Rhythm Society and updated annually by an expert committee.
- Decision algorithm for pacemaker/defibrillator management
- Endorsed by Heart Rhythm Society
- Based on ASA Perioperative Cardiac Implantable Electronic Device Management Aid
- Annual expert committee updates
- Designed for medical professionals
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Periop Pacemaker is a smartphone app that assists medical professionals who take care of surgical patients that have implantable defibrillators or pacemakers. The decision algorithm is endorsed by the Heart Rhythm Society and is based on the American Society of Anesthesiologists Perioperative Cardiac Implantable Electronic Device Management Aid. As device technology evolves, an expert committee of anesthesiologists, cardiologists, and device representatives will meet annually to keep information up-to-date. Disclaimer: ASA Pacemaker is designed for use by medical professionals only. Accessing the app content requires either a one-time payment of $7.99 USD or an annual subscription payment of $2.99 USD. A 30-day free trial is available under the annual subscription plan.
Screenshots
Verdict
The clearest difference is review sentiment: Periop Pacemaker at 100% against Ether's 40%. Periop Pacemaker also leads on iOS requirement (13.0 vs 15.6). Ether's advantage is in-app purchases (none vs 2). On price, update cadence, ads 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. Periop Pacemaker sells 2 in-app purchases, starting at $2.99 per year. Ether asks for nothing beyond the download.
Ether ships an update every 6 weeks, Periop Pacemaker every 2 months. The most recent releases landed on October 3, 2026 and September 27, 2026 respectively.
| Parameter | Ether | Periop Pacemaker |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (8 ratings) — better |
| Positive reviews | 40.0% of reviews | 100.0% of reviews — better |
| Number of ratings | — | 8 — better |
| Update frequency | Every 6 weeks — better | Every 2 months |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 15.6 | 13.0 — better |
| Further details — not scored | ||
| Size | 4 MB | 43 MB |
| Age rating | 4+ | 17+ |
| Developer | Stanford Anesthesia Informatics And Media Lab | Rhythm Management, LLC |
Customer experience
Ether
Periop Pacemaker
In-app purchases
Ether
No in-app purchases
Periop Pacemaker
- PERIOP PACEMAKER ANNUAL FEE1 Month trial$2.991 Year
- Periop Pacemaker$7.99








