OEI Sim vs CTGi
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
CTGi
This app simulates a fetal heart rate monitor for obstetric training. It offers a realistic and economical platform for facilitators and students to learn and practice. Utilizing everyday technology, it provides an advanced simulation experience.
- Realistic fetal heart rate monitoring simulation
- Economical training solution
- Ideal for in-situ training
- Advanced obstetric simulation
- Built with everyday technology
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CTGi provides an economical, highly advanced and realistic fetal heart rate monitor simulation package. Using just two iPads, the lightness and simplicity of CTGi makes it ideal for in-situ training. CTGi gives facilitators a great tool for training and students an incredibly realistic platform to learn from. CTGi offers obstetric simulation as you’ve never seen it before, built off technology you use every day.
Verdict
OEI Sim and CTGi are too close to call on the numbers: across 9 compared parameters — price, rating, ratings volume and update cadence among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
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. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 5.0 for OEI Sim against 5.0 for CTGi. Both are backed by a comparable volume of ratings — 4 and 2 respectively.
Both ship on a similar rhythm, roughly every 3 months. The most recent releases landed on June 1, 2026 and September 1, 2026 respectively.
| Parameter | OEI Sim | CTGi |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (4 ratings) | 5.0 (2 ratings) |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 4 — better | 2 |
| Update frequency | Every 3 months | Every 3 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPad | iPad |
| Requires iOS | 14.1 | 13.0 — better |
| Further details — not scored | ||
| Size | 47 MB | 23 MB |
| Age rating | 4+ | 17+ |
| Developer | Operative Experience Inc | iSimulate Pty Ltd |
Customer experience
OEI Sim
CTGi
In-app purchases
OEI Sim
No in-app purchases
CTGi
No in-app purchases





