OEI Sim vs ECG Vector
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
OEI Sim
This application allows instructors to remotely control patient simulators, adjusting vital signs, sounds, and physiological responses. It supports various simulators for tactical casualty care and birthing scenarios, providing detailed simulation management.
- Control simulator temperature and blood pressure
- Adjust chest compression and pulse points
- Manage ECG rhythms and lung sounds
- Control heart and airway sounds
- Log simulation activity
- Real-time self-diagnostics
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The Operative Experience Instructor Control Interface app provides control of Operative Experience patient simulators. Tactical Casualty Care Simulator Plus (Male and Female versions) Touchscreen control of: Simulator Temperature Blood Pressure Chest Compression Independent pulses at 14 different locations Swollen Tongue Blinking eyes 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 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 Simulation activity log Real-time self-diagnostics Tactical Casualty Care Simulator (Male and Female versions) Touchscreen control of: ⁃ Pulsatile Bleeding ⁃ Respiratory Rate ⁃ Bilateral and Independent Chest Excursion ⁃ Heart Rate Simulation activity log Real-time self-diagnostics RealMom Birthing Simulator Touchscreen control of: ⁃ Maternal and Fetal Heart Rate ⁃ Respiratory Rate ⁃ Hemorrhage Bleeding ⁃ Cervical Effacement, Dilation and Station ⁃ Blood Pressure ⁃ SP02 ⁃ Temperature Simulation activity log Real-time self-diagnostics
ECG Vector
This educational simulator allows users to explore the relationship between the heart's electrical activity and ECG waveforms. It offers interactive workspaces to visualize cardiac processes, ion channel functions, and simulate cardiac rhythms. Users can learn and test their knowledge through quizzes, with both free and paid features available.
- 3D cardiac activation visualization
- Ion channel and ECG correlation
- Ventricular action potential simulation
- Cardiac rhythm adjustment and exploration
- ECG pattern identification and quizzes
- Cross-platform compatibility (Mac, iPhone, iPad)
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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 review sentiment: OEI Sim at 100% against ECG Vector's 0%. OEI Sim also leads on in-app purchases (none vs 1) and iOS requirement (14.1 vs 17.0). ECG Vector's advantage is update cadence (weekly vs every 3 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 asks for nothing beyond the download.
OEI Sim ships an update every 3 months, ECG Vector weekly. The most recent releases landed on November 4, 2026 and October 31, 2026 respectively.
| Parameter | OEI Sim | ECG Vector |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (4 ratings) — better | — |
| Positive reviews | 100.0% of reviews — better | 0.0% of reviews |
| Number of ratings | 4 — better | — |
| Update frequency | Every 3 months | Weekly — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPad | iPhone, iPad, Mac — better |
| Requires iOS | 14.1 — better | 17.0 |
| Further details — not scored | ||
| Size | 47 MB | 12 MB |
| Age rating | 4+ | 4+ |
| Developer | Operative Experience Inc | Takashi Nakano |
Customer experience
OEI Sim
ECG Vector
In-app purchases
OEI Sim
No in-app purchases
ECG Vector
- ECG Vector Pro$6.99








