Comparison

ECG EKG Interpretation Mastery vs ECG Builder

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

Head to head
About

ECG EKG Interpretation Mastery

Learn to interpret ECGs with this comprehensive app. It offers study materials, practice ECG strips, and essential clinical facts to help you understand abnormal EKGs and master 12-lead interpretations.

Highlights
  • Master ECG interpretation
  • Comprehensive guides and tips
  • No more big books
  • Lead placement diagrams
  • Dozens of 12-lead ECGs
  • Practice tools with heart rhythms
Features
Currently charting
Read full description

The simplest way to learn ECG interpretation. Study on-the-go with ECG strips, full-color graphics, up-to-date information tables, core clinical facts, and never again be confused by a 12-lead ECG or wonder what an abnormal EKG means. Download ECG Mastery and see why we are the best electrocardiogram app on the market! Whether you are a paramedic, nurse, clinician, or medical student, ECG Mastery simplifies the learning process and helps you interpret ECGs with confidence. Why choose ECG Mastery: Created by the makers of top-selling NCLEX Mastery, FNP Mastery, and ACLS Mastery apps, ECG Mastery offers a streamlined, efficient way to learn ECG interpretation. Whether you are a paramedic, nurse, clinician, or medical student, our app helps you approach every EKG monitor line with confidence and understanding. • Master ECG interpretation: Comprehensive guides and tips. • No More Big Books: All essential information in one app. • Lead Placement Diagrams: Axis interpretation and more. • Dozens of 12 Lead ECGs: Only learn what’s clinically relevant and safely ignore the rest. • Practice Tools: Interpret typical and uncommon heart rhythms on EKG strips. Save time, energy, and money by avoiding complicated textbooks and expensive on-site courses. Study where and when you want, and only learn what’s necessary for your clinical practice. Download ECG Mastery today and see why we are the best electrocardiogram app on the market! Subscribe and get access to all content: • 1 Month: $11.99 each month • 3 Months: $29.99 every three months • 12 Months: $74.99 each year Upon confirming your purchase, you'll be billed immediately. Your subscription will automatically renew unless you turn off the auto-renewal feature at least 24 hours before the end of the current subscription period. After purchase, you can manage your subscription and deactivate auto-renewal through your Account Settings. Note that any unused portion of a free trial, if offered, will be forfeited when you buy a subscription. Privacy Policy - http://builtbyhlt.com/privacy Terms of Conditions - http://builtbyhlt.com/EULA Customer Support: Your success matters to us. Talk to a real person at support@hltcorp.com or (319) 246-5271.

About

ECG Builder

Features
Read full description

Draw any 12-lead ECG in seconds. Describe it in plain words or build it tool by tool, then export it for your slide, handout or exam. DESCRIBE IT AND IT DRAWS "Inferior STEMI at 52 with reciprocal change." "Atrial fibrillation with RVR at 140." "LBBB with a paced rhythm." The sheet prints onto real millimetre paper, left to right, the way a recorder does. OR BUILD IT BY HAND Eleven tools, one question each: - Rhythm, Rate, Intervals - Conduction, Ischaemia, Repolarisation - Chambers, Ectopy, Pacing - Syndromes, Sequence NOT A LIBRARY OF PICTURES Every tracing comes out of a physiologic model, so the findings agree with each other. - Add inferior ST elevation and the reciprocal depression appears in aVL by itself - Drag the rate under 60 and sinus rhythm relabels itself sinus bradycardia - Pace the ventricle and the spike projects onto all twelve leads, with the right polarity in each WHAT IS IN IT - 26 rhythms, sinus arrhythmia through torsades to asystole - 21 named patterns in one tap: Wellens A and B, de Winter, Brugada 1 and 2, S1Q3T3, pericarditis, early repolarisation, hypothermia, digoxin, hyperkalaemia, LVH with strain, long QT and more - Sequence: the rhythm changes partway through the strip, with a shock where you want it - 5 layouts, including 3x4 with a rhythm strip and a stacked layout for the phone - 4 papers, thermal cream to defibrillator monitor - 25 or 50 mm/s, 10 mm/mV. Hold a ruler to the screen and the intervals measure correctly - Baseline drift, muscle tremor and mains hum, each on its own slider - A patient header the way a machine prints it: name, age, sex, rate, rhythm, date and time. All of it yours to set, all of it fictional TEACHING BOARD (IPAD) - Hide the tools and the sheet becomes a board - Draw on it with Apple Pencil. Marks stay on their beats at any zoom - The frontal axis wheel and the chest lead map sit beside it, each with room for the pen - Play runs all twelve leads live at the speed printed on the sheet - Record the screen while you teach and send the video to your students - Save the board as a Letter handout EXPORT - PNG for a slide - Vector PDF at true physical size, still measurable with a ruler once printed - Yours to use in slides, handouts, exams and question banks, including commercially FREE AND PRO Free builds a normal twelve-lead and will show you any other one. Ask for torsades de pointes and you get torsades de pointes, drawn in full, as a watermarked preview you can read but not edit or export. ECG Builder Pro is one purchase, not a subscription, and it covers Family Sharing. It unlocks every rhythm and every finding to edit, rolls a new patient with the same diagnosis, and lets the sheet leave the app clean. No account, no sign-in, no network. The app works in Airplane Mode and nothing you type leaves the device. EDUCATIONAL USE ONLY Every tracing is synthetic, generated. ECG Builder is not a medical device and must not be used for diagnosis, treatment, or any patient-care decision. ECG Builder is a CardioLens product.

Screenshots

ECG EKG Interpretation Mastery4 screens
ECG Builder4 screens

Verdict

The call

The clearest difference is update cadence: ECG Builder at daily against ECG EKG Interpretation Mastery's every 3 weeks. ECG EKG Interpretation Mastery's advantage is chart position (#148 vs unranked) and iOS requirement (15.0 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. ECG EKG Interpretation Mastery sells 3 in-app purchases, starting at $9.99 per month and ECG Builder sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

ECG EKG Interpretation Mastery ships an update every 3 weeks, ECG Builder daily. The most recent releases landed on October 24, 2026 and October 15, 2026 respectively.

Scorecard3 real differences · 8 level
ECG EKG Interpretation Mastery versus ECG Builder: the parameters behind the verdict, then further details
ParameterECG EKG Interpretation MasteryECG Builder
PriceFreeFree
Rating4.5 (718 ratings) — better—
Positive reviews25.0% of reviews—
Number of ratings718 — better—
Update frequencyEvery 3 weeksDaily — better
AdsNoNo
In-app purchasesYesYes
MonetizationSubscription—
Best chart rank#148 — better—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better17.0
Further details — not scored
Size132 MB9 MB
Age rating12+17+
DeveloperHigher Learning TechnologiesMark Daniel Figueroa

Bugs and requests

ECG EKG Interpretation Mastery

Reported bugs

5 issues
  • Quiz feature is broken or inaccessible
  • Practice questions advertised but cannot be accessed
  • Screen not compatible with iPhone X
  • App requires email or Facebook login to use
  • Paywall prevents access to advertised content

Requested features

9 requests
  • Comprehensive practice questions with explanations
  • Actual video lessons or detailed tutorials
  • Random 12-lead EKG quiz functionality
  • Daily tasks and practice questions
  • More extensive examples and case studies
Show 4 more
  • Coverage of rare conditions (e.g., Brugada syndrome)
  • One-time purchase option instead of subscription
  • Better organization and presentation (not Word-style)
  • Apple Watch compatibility

ECG Builder

Not enough reviews yet to summarise bugs or requests.

In-app purchases

3 purchases

ECG EKG Interpretation Mastery

Subscriptions3
  • ECG EKG Mastery - 1 Month3 Days trial$9.991 Month
  • ECG EKG Mastery - 3 Months3 Days trial$29.993 Months
  • ECG EKG Mastery - 12 Months3 Days trial$74.991 Year
1 purchases

ECG Builder

One-time1
  • ECG Builder Pro$24.99

Questions

Is ECG EKG Interpretation Mastery free?
ECG EKG Interpretation Mastery is free to download, with in-app purchases available.
Is ECG Builder free?
ECG Builder is free to download, with in-app purchases available.
Do ECG EKG Interpretation Mastery or ECG Builder have ads?
Neither ECG EKG Interpretation Mastery nor ECG Builder shows ads.
Which is updated more often, ECG EKG Interpretation Mastery or ECG Builder?
ECG EKG Interpretation Mastery ships an update every 3 weeks, and ECG Builder daily. Most recently, ECG EKG Interpretation Mastery was updated on October 24, 2026 and ECG Builder on October 15, 2026.

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