Comparison

OEI Sim vs ECG Vector

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

Head to head
About

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.

Highlights
  • 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
Features
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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

About

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.

Highlights
  • 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)
Features
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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

ECG Vector4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. ECG Vector sells 1 one-off in-app purchase. OEI Sim asks for nothing beyond the download.

UpkeepUpdate frequency

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.

Scorecard6 real differences · 4 level
OEI Sim versus ECG Vector: the parameters behind the verdict, then further details
ParameterOEI SimECG Vector
PriceFreeFree
Rating5.0 (4 ratings) — better—
Positive reviews100.0% of reviews — better0.0% of reviews
Number of ratings4 — better—
Update frequencyEvery 3 monthsWeekly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPadiPhone, iPad, Mac — better
Requires iOS14.1 — better17.0
Further details — not scored
Size47 MB12 MB
Age rating4+4+
DeveloperOperative Experience IncTakashi Nakano

Customer experience

OEI Sim

All ratings4 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

ECG Vector

Written reviews1 reviews
Positive0.0%
Neutral100.0%
Negative0.0%

In-app purchases

None

OEI Sim

No in-app purchases

1 purchases

ECG Vector

One-time1
  • ECG Vector Pro$6.99

Questions

Is OEI Sim free?
OEI Sim is free to download, with no in-app purchases.
Is ECG Vector free?
ECG Vector is free to download, with in-app purchases available.
Do OEI Sim or ECG Vector have ads?
Neither OEI Sim nor ECG Vector shows ads.
Which is updated more often, OEI Sim or ECG Vector?
OEI Sim ships an update every 3 months, and ECG Vector weekly. Most recently, OEI Sim was updated on November 4, 2026 and ECG Vector on October 31, 2026.

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