OEI Sim Pro vs ECG Vector
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
OEI Sim Pro
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OEI Sim Pro offers a sleek, new interface for control of your Operative Experience tactical simulators with powerful new features, including new clinical and trauma scenarios, scenario editor, drug recognition, expanded simulation logs and diagnostics as well as fully integrated 12-lead ECG patient monitoring, and advanced patient conditions and physiology for TCCS Pro and PCCS Pro male and female simulators. Provides touchscreen control of: Bleeding Respiratory Rate SPO2 ETCO2 Bilateral and Independent Chest Excursion Heart Rate Heart Sounds Patient Temperature Blood Pressure Independent Pulses at 14 Different Locations Airway Complication Airway Sounds Lung Sounds Blinking Eyes Simulation Activity Log Real-time Self-Diagnostics ECG Rhythms: Sinus Rhythm Sinus Bradycardia Sinus Tachycardia 1st Degree AV Block Junctional Rhythm Accelerated Junctional Rhythm Idioventricular Rhythm Accelerated Idioventricular Rhythm Supraventricular Rhythm Monomorphic VT Pulseless Ventricular Tachycardia (V-Tach) Pulseless Ventricular Fibrillation (V-Fib) Pulseless Electrical Activity (PEA) 2nd Degree AV block type 1 2nd Degree AV block type 2 Complete Heart block Supraventricular V-Tach Atrial Fibrillation Atrial Flutter Lung Sounds Precise control/playing of Lung Sounds relative to variations in Respiratory Rate Lung Sounds can be auscultated at the following locations: Left Anterior 1st Intercostal Anterior Lower Anterior Mid Axillary Right Anterior 1st Intercostal Anterior Lower Anterior Supported Lung Sounds include: No Sound Normal Wheeze Rhonchi Pleural Rub Crackles Coarse Heart Sounds Heart Sounds can be auscultated at the following locations: Aortic Pulmonic Mitral Tricuspid Supported Heart Sounds include: No Sound Normal S3 S4 S3 & S4 Early Systolic Murmur Mid Systolic Murmur Late Systolic Murmur Pan Systolic Murmur Late Diastolic Murmur Support for Airway Sounds No Sound Normal Stridor Bowel Sounds in four quadrants Patient Conditions Cardiovascular (BP) Hypertension Hypertension Stage 1 Hypertension Stage 2 Hypertensive Urgency Hypertensive Emergency (BP) Hypotension (HR) Bradycardia Mild Moderate Severe (HR) Tachycardia Mild Moderate Severe Hypovolemia Stage 1 Hypovolemia Stage 2 Hypovolemia Stage 3 Hypovolemia Stage 4 Respiratory Rate (RR) Bradypnea Acidosis, Respiratory Cheyne-Stokes Breathing Apneic breathing Tachypnea Akalosis, Respiratory Kussmaul breathing Temperature Hypothermia Stage 1 Hypothermia Stage 2 Hypothermia Stage 3 Hypothermia Stage 4 Hypothermia Stage 5 Hyperthermia Hypoglycemia Others Anaphylaxis Seizure Urine output
ECG Vector
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ECG Vector is an educational simulator for exploring how electrical activity in the heart relates to ECG waveforms. Switch between six learning workspaces on Mac, iPhone, and iPad. ECG Mechanism Observe 3D activation and repolarization, the cardiac source vector, and lead-axis projections in sync with the ECG. Use single-lead decomposition, two-lead comparison, and the 12-lead view to understand differences in polarity and shape. Ion & ECG Explore educational approximations linking Na⁺, K⁺, Ca²⁺, H⁺ (pH), and major ion currents to action potentials, ECG measures, and clinical conditions. See differences from the reference alongside explanations. Ventricular Action Potential Numerically simulate a single ventricular cell using Luo–Rudy I (1991). View membrane voltage, Na⁺/Ca²⁺/K⁺ currents, conductances, and gates together. Pause at the peak sodium current and compare with the membrane diagram. Cardiac Rhythm View representative regional action potentials on a shared timeline. Adjust the sinus cycle, conduction speed, and AV delay, and explore schematic examples of normal rhythm, bradycardia, tachycardia, and AV block. ECG & Conditions Compare normal and representative clinical patterns in single-lead or 12-lead views, with explanations of waveform features and their mechanisms. Learn & Quiz Identify patterns from the 12 leads and rhythm strip, then deepen your understanding with explanations. Free access includes Adult Normal and Right Bundle Branch Block, all standard 12 leads, fixed electrode placement, four guided Ion & ECG examples, and comparison and quiz samples. The standard ventricular-cell model, stimulus adjustment, playback, current and gate inspection, and all Cardiac Rhythm features are also free. The one-time ECG Vector Pro purchase unlocks unrestricted Ion & ECG adjustment and its synchronized 12-lead response; ventricular-cell conductance adjustment, suppression presets, and comparison with the standard trace; additional pediatric and clinical patterns; custom leads; electrode editing; and the complete comparison and quiz libraries. This is not a subscription. For education only—not diagnosis, treatment decisions, or patient-specific prediction. Ion & ECG uses educational response approximations; the ventricular-cell model is based on guinea-pig ventricular muscle; Cardiac Rhythm uses waveform templates and activation timings. A single-cell membrane potential is not a surface ECG or a QT interval. No sign-in or external hardware is required.
Screenshots
Verdict
The clearest difference is in-app purchases: OEI Sim Pro at none against ECG Vector's 1. OEI Sim Pro also leads on iOS requirement (14.1 vs 17.0). ECG Vector's advantage is update cadence (every 9 days vs every 23 months) and device support (3 vs 1). On price and ads 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. ECG Vector sells 1 one-off in-app purchase. OEI Sim Pro asks for nothing beyond the download.
OEI Sim Pro ships an update every 23 months, ECG Vector every 9 days. The most recent releases landed on October 24, 2026 and October 14, 2026 respectively.
| Parameter | OEI Sim Pro | ECG Vector |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 23 months | Every 9 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Devices | iPad | iPhone, iPad, Mac — better |
| Requires iOS | 14.1 — better | 17.0 |
| Further details — not scored | ||
| Size | 112 MB | 12 MB |
| Age rating | 4+ | 4+ |
| Developer | Operative Experience Inc | Takashi Nakano |
In-app purchases
OEI Sim Pro
No in-app purchases
ECG Vector
- ECG Vector Pro$6.99









