Code Blue Monitor vs ECG Builder
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
Code Blue Monitor
This medical simulation app transforms your devices into a patient monitor and instructor remote. It allows for realistic training scenarios with dynamic vital signs and ECG changes that respond to learner actions. Ideal for medical education, it requires no special hardware and offers a free version with core features.
- Patient monitor simulation
- Instructor remote control
- Dynamic ECG and vital signs
- Realistic patient charts
- Cardiac arrest scenarios
- Defibrillator and AED training
- Debriefing guides
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Code Blue Monitor turns an iPad into a patient monitor and an iPhone into the instructor's remote. When the instructor changes the patient's condition on the iPhone, the monitor in front of the learners actually changes β so learners notice the deterioration themselves instead of being told. No high-fidelity simulator needed. Use the iPad, iPhone and BLS manikin you already have, on the ward or in the skills lab. No Wi-Fi router or internet required. CHART CASES THAT UNFOLD STEP BY STEP - 52 ward patients, each with physician and nursing notes, labs, imaging and orders, presented like a real chart - Filter by the learners' unit: surgical, medical, neurosurgical, cardiology, obstetrics, dialysis and more - Each case starts at a stable point; press Next and the ECG and vitals change to follow the chart - ECGs match the pathophysiology: ST elevation in myocardial infarction, U waves in hypokalaemia - Blood gas, imaging and breath sounds follow the timeline - Press Arrest to move into cardiac arrest at any point, or Improve to steer towards recovery β the outcome follows what the learners do - An instructor debriefing guide for every case: pathophysiology, expected actions, SBAR example and discussion questions MONITOR AND DEFIBRILLATOR - 35 ECG rhythms, including VF, pulseless VT, PEA, asystole, every AV block, ST elevation, hyperkalaemia and torsades - Heart rate, blood pressure, SpOβ, respiratory rate, temperature, EtCOβ and arterial line - Values appear only when a sensor is attached; any value can be hidden - Defibrillation, synchronised cardioversion and transcutaneous pacing on a dial laid out like a real device; set the capture threshold from the remote - Voice-guided AED mode in English, Japanese and Spanish INVESTIGATIONS AND PHYSICAL FINDINGS - 12-lead ECG, blood gas, chest X-ray and echo - Breath sounds, heart sounds timed to the ECG, and pupil findings - Add your own images (X-ray, CT, ECG and more) FOR INSTRUCTORS - 23 scenario presets - Event log and a debriefing record you can share as PDF - A learner screen with the controls hidden - English, Japanese and Spanish interface FREE VERSION - Four rhythms: sinus rhythm, VF, pulseless VT and asystole - Defibrillation (up to 3 shocks per scenario) and the voice-guided AED (no limit) - iPhone remote and vital-sign control - One full chart case (post-operative respiratory failure), with Next, Arrest, blood gas and auscultation FULL VERSION Unlock every feature in the app with a one-time purchase or a monthly plan. - One-time purchase: buy once, with free updates - Monthly plan: for the months you teach. Auto-renewing subscription. Payment is charged to your Apple ID at confirmation and renews automatically unless cancelled at least 24 hours before the end of the period. Manage or cancel in Settings > your name > Subscriptions For institutions deploying to several iPads, choose Code Blue Monitor Pro, available through Apple School Manager and Apple Business Manager. IMPORTANT This app is a simulator for education and training only. It is not a medical device and must not be used for patient monitoring, diagnosis or treatment. All waveforms and values are simulated. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://codeblue.co.jp/monitor/en/privacy/
ECG Builder
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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 AND IPHONE DUO) - Hide the tools and the sheet becomes a board - Draw on it with Apple Pencil, or a finger when no Pencil is set up. 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 BUILT FOR IPHONE DUO - Open, it is the full studio: the sheet across the top, every tool below it - Closed, the cover runs the guided builder - Fold or unfold mid-build: the tracing, your step and your board marks stay put - The tools sit in the side column beside the clock, so the paper keeps the screen 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
Verdict
The clearest difference is update cadence: Code Blue Monitor at every 2 days against ECG Builder's every 2 weeks. Code Blue Monitor also leads on iOS requirement (15.0 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. Code Blue Monitor sells 2 in-app purchases, starting at $19.99 per month and ECG Builder sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
Code Blue Monitor ships an update every 2 days, ECG Builder every 2 weeks. The most recent releases landed on November 1, 2026 and October 31, 2026 respectively.
| Parameter | Code Blue Monitor | ECG Builder |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 80.0% of reviews | β |
| Update frequency | Every 2 days β better | Every 2 weeks |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | β |
| Devices | iPhone, iPad, iPod β better | iPhone, iPad |
| Requires iOS | 15.0 β better | 17.0 |
| Further details β not scored | ||
| Size | 49 MB | 9 MB |
| Age rating | 17+ | 17+ |
| Developer | Code Blue Co.,Ltd. | Mark Daniel Figueroa |
In-app purchases
Code Blue Monitor
- Monthly Plan1 Month trial$19.991 Month
- Full Version$199.99
ECG Builder
- ECG Builder Pro$24.99
Questions
Is Code Blue Monitor free?
Is ECG Builder free?
Do Code Blue Monitor or ECG Builder have ads?
Which is updated more often, Code Blue Monitor or ECG Builder?
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