Comparison

Periop Pacemaker vs LabRef

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

Head to head
About

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.

Highlights
  • 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
Features
Read full description

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.

About

LabRef

This medical reference app provides concise interpretations and reference ranges for common laboratory values across various disciplines. It's designed for quick access at the bedside, aiding in clinical decision-making. The app is for educational and informational purposes only.

Highlights
  • Interprets common laboratory values
  • Covers hematology, nephrology, critical care, and perioperative medicine
  • Provides concise interpretations
  • Includes reference ranges
  • Clean, intuitive interface
  • Optimized for bedside use
Features
Read full description

LabRef is a clinically focused reference for interpreting common laboratory values. Covering disciplines from hematology and nephrology to critical care and perioperative medicine, it delivers concise interpretations and reference ranges through a clean, intuitive interface optimized for rapid use at the bedside. 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

Periop Pacemaker4 screens
LabRef4 screens

Verdict

The call

The clearest difference is in-app purchases: LabRef at none against Periop Pacemaker's 2. LabRef also leads on ratings volume (25 vs 8). Periop Pacemaker's advantage is iOS requirement (13.0 vs 26). On price, rating, review sentiment and update cadence 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. Periop Pacemaker sells 2 in-app purchases, starting at $2.99 per year. LabRef asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Periop Pacemaker against 5.0 for LabRef. Both are backed by a comparable volume of ratings — 8 and 25 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

Periop Pacemaker ships an update every 2 months, LabRef every 5 weeks. The most recent releases landed on September 9, 2026 and September 23, 2026 respectively.

Scorecard4 real differences · 6 level
Periop Pacemaker versus LabRef: the parameters behind the verdict, then further details
ParameterPeriop PacemakerLabRef
PriceFreeFree
Rating5.0 (8 ratings)5.0 (25 ratings)
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings825 — better
Update frequencyEvery 2 monthsEvery 5 weeks — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPodiPhone, iPad
Requires iOS13.0 — better26
Further details — not scored
Size43 MB16 MB
Age rating17+17+
DeveloperRhythm Management, LLCRishi Kumar

Customer experience

Periop Pacemaker

All ratings8 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews5 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

LabRef

All ratings25 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

2 purchases

Periop Pacemaker

Subscriptions1
  • PERIOP PACEMAKER ANNUAL FEE1 Month trial$2.991 Year
One-time1
  • Periop Pacemaker$7.99
None

LabRef

No in-app purchases

Questions

Is Periop Pacemaker free?
Periop Pacemaker is free to download, with in-app purchases available.
Is LabRef free?
LabRef is free to download, with no in-app purchases.
Which has better reviews, Periop Pacemaker or LabRef?
Periop Pacemaker and LabRef are both rated 5.0 out of 5 on the App Store, from 8 and 25 ratings respectively.
Do Periop Pacemaker or LabRef have ads?
Neither Periop Pacemaker nor LabRef shows ads.
Which is updated more often, Periop Pacemaker or LabRef?
Periop Pacemaker ships an update every 2 months, and LabRef every 5 weeks. Most recently, Periop Pacemaker was updated on September 9, 2026 and LabRef on September 23, 2026.

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