Comparison

RezClock vs AHA ACLS

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

Head to head
About

RezClock

Automates medical resident duty hour tracking using location services to log arrival and departure times at clinical sites. Hours can be uploaded to other systems for generating ACGME required reports. Offers a free trial period before subscription.

Highlights
  • Automated time tracking
  • Location-based geofencing
  • Duty hours reporting
  • Data upload to MedProSuite
  • Free trial period
Features
Read full description

Medical Resident Duty Hours management app. RezClock automates time tracking for medical residents. RezClock uses phone's location services to determine when the resident arrives and leaves the clinical site. A clinical site is defined by creating a geofence around each work site user visits. The hours captured can then be uploaded to MedProSuite.com or another Duty Hours Tracking product to generate ACGME required Duty Hours Reports. Please note: Continued use of GPS running in the background can dramatically decrease battery life. RezClock is available by subscription(first 15 days are free). You may continue by: - Subscribing to RezClock Monthly for $0.99/month - Payment will be charged to 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 - Account will be charged for renewal within 24-hours prior to the end of the current period, and identify the cost of the renewal - Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase - Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable Terms & Conditions - http://rezclock.com/terms-conditions.html Privacy - http://rezclock.com/privacy.html

About

AHA ACLS

This app provides clinicians with a digital tool to assist in running cardiac arrest codes and delivering advanced cardiac life support (ACLS) at the bedside. It features the latest AHA recommendations and includes intuitive access to algorithms, drug dosing, and timers for efficient patient care.

Highlights
  • 4 ACLS algorithms (cardiac arrest, tachycardia, bradycardia, post-arrest)
  • Latest 2025 AHA ACLS content
  • Drug therapy and dosing
  • Easy-to-read timers
  • CPR and epinephrine logging
  • Rapid transition to post-arrest care
Features
Currently charting
Read full description

The AHA ACLS app is the American Heart Association's (AHA) officially endorsed digital health solution to assist clinicians in running codes and delivering bedside ACLS care with actual patients. The app was developed by Harvard-trained physicians, in collaboration with the AHA, to help fellow physicians, nurses, physician assistants, nurse practitioners, and EMTs deliver the highest level of advanced cardiac life support (ACLS) at the point-of-care. It began as a project to assist clinicians within Massachusetts General Hospital (MGH), a Harvard Medical School teaching hospital—and then expanded to have a global scope after significant positive impact was demonstrated. Importantly, real-time feedback from our clinician users continuously drives improvements in app design, features, and function so that you will have the best experience providing life-saving care at the bedside. The AHA ACLS app is the only one to have all content vetted by both the AHA science team and practicing Harvard-affiliated physicians. It also features the latest 2025 release of AHA recommendations for ACLS. We owe it to our patients to use the best digital health tools to give them the highest chance of surviving acute life-threatening cardiac illnesses. To this end, we have developed a low cost, intuitive, and rigorously vetted mobile app to assist clinicians— including in all stages of training—and enhance ACLS care at the bedside. Features: - Intuitive design to rapidly access 4 ACLS algorithms (i.e. cardiac arrest, tachycardia with pulse, bradycardia with pulse, and post cardiac arrest care) - Includes all recently released 2025 ACLS content including drug therapy and dosing, reversible causes, etc. - Easy-to-read timers and ability to log rounds of CPR, epinephrine, and defibrillations - Button within cardiac arrest algorithm that allows for rapid transition to post cardiac arrest care pathway once patient achieves ROSC - All content rigorously vetted by AHA science team and practicing Harvard-affiliated physicians We continue to iterate based on real-time clinician feedback, so that you will have the best experience providing life-saving care at the bedside. AHA ACLS offers an auto-renewing annual subscription at $3.99/year with a 3-day free trial. You will have unlimited access to all content while you maintain an active subscription. Payment will be charged to the credit card connected to your Apple ID Account when you confirm the initial subscription purchase. Subscriptions automatically renew unless auto-renew is turned off at least 24-hours before the end of the current subscription period. Your account will be charged for renewal within 24-hours prior to the end of the current period. You may manage your subscription and auto-renewal may be turned off by going to your Account Settings after the purchase. Any unused portion of the free trial period, if offered, will be forfeited when you purchase a subscription. You can read more about our terms and conditions in the app.

Screenshots

RezClock4 screens
AHA ACLS4 screens

Verdict

The call

The clearest difference is rating: AHA ACLS at 4.9 against RezClock's 2.3. AHA ACLS also leads on update cadence (every 2 months vs every 35 months) and review sentiment (26% vs 0%). RezClock's advantage is iOS requirement (10.0 vs 15.1). On price, ads, in-app purchases and monetization model 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. RezClock sells 1 in-app purchase, starting at $0.99 per month and AHA ACLS sells 1 in-app purchase, starting at $3.99 per year. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

AHA ACLS holds the better App Store score, 4.9 against 2.3. That said, the two scores are not equally well evidenced: AHA ACLS has 277 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 0% of RezClock's written reviews are positive against 26% of AHA ACLS's.

UpkeepUpdate frequency

RezClock ships an update every 35 months, AHA ACLS every 2 months. The most recent releases landed on June 11, 2026 and September 24, 2026 respectively.

Scorecard6 real differences · 5 level
RezClock versus AHA ACLS: the parameters behind the verdict, then further details
ParameterRezClockAHA ACLS
PriceFreeFree
Rating2.3 (3 ratings)4.9 (277 ratings) — better
Positive reviews0.0% of reviews26.3% of reviews — better
Number of ratings3277 — better
Update frequencyEvery 35 monthsEvery 2 months — better
AdsNoNo
In-app purchasesYesYes
MonetizationSubscriptionSubscription
Best chart rank—#62 — better
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS10.0 — better15.1
Further details — not scored
Size24 MB48 MB
Age rating4+17+
DeveloperMitra U.S. Computer Solutions, IncMassachusetts General Hospital

Customer experience

RezClock

All ratings3 ratings
Positive33.3%
Neutral0.0%
Negative66.7%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

AHA ACLS

All ratings277 ratings
Positive99.3%
Neutral0.4%
Negative0.4%
Written reviews80 reviews
Positive26.3%
Neutral3.8%
Negative70.0%

Bugs and requests

RezClock

Not enough reviews yet to summarise bugs or requests.

AHA ACLS

Reported bugs

3 issues
  • App fails to load information despite subscription payment
  • Users locked out of app mid-code
  • Unexpected app crashes during critical moments

Requested features

10 requests
  • Multiple log storage with dates
  • More detailed code logging with event documentation (IO access, medications, rhythms)
  • End code button and pause compressions feature
  • Real-time log tracking for back-charting
  • LVAD algorithm inclusion
Show 5 more
  • Additional medication counters (bicarbonate, calcium)
  • One-time purchase option instead of subscription
  • Free basic version with premium features behind paywall
  • Voluntary donation model instead of mandatory subscription
  • Actual time reflection in logs for accurate timekeeping

In-app purchases

1 purchases

RezClock

Subscriptions1
  • RezClock Monthly - $0.99/month$0.991 Month
1 purchases

AHA ACLS

Subscriptions1
  • ACLS Pro3 Days trial$3.991 Year

Questions

Is RezClock free?
RezClock is free to download, with in-app purchases available.
Is AHA ACLS free?
AHA ACLS is free to download, with in-app purchases available.
Which has better reviews, RezClock or AHA ACLS?
AHA ACLS is rated higher. RezClock averages 2.3 out of 5 from 3 ratings, while AHA ACLS averages 4.9 from 277 ratings.
Do RezClock or AHA ACLS have ads?
Neither RezClock nor AHA ACLS shows ads.
Which is updated more often, RezClock or AHA ACLS?
RezClock ships an update every 35 months, and AHA ACLS every 2 months. Most recently, RezClock was updated on June 11, 2026 and AHA ACLS on September 24, 2026.

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