# CTGi vs OEI Sim Pro

The clearest difference is update cadence: CTGi at every 3 months against OEI Sim Pro's every 23 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

CTGi ships an update every 3 months, OEI Sim Pro every 23 months. The most recent releases landed on September 1, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | CTGi | OEI Sim Pro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/ctgi/id1342875195/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 23 months |
| Monetization | Free | — |
| Size | 23 MB | 112 MB |
| Requires iOS | **13.0** | 14.1 |
| Devices | iPad | iPad |
| Age rating | 17+ | 4+ |
| Developer | [iSimulate Pty Ltd](https://appshunter.io/developer/494486341) | [Operative Experience Inc](https://appshunter.io/developer/1309239394) |

## What reviewers say

### CTGi

[App page](https://appshunter.io/ios/app/ctgi/id1342875195)

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.

**Highlights:** Realistic fetal heart rate monitoring simulation, Economical training solution, Ideal for in-situ training, Advanced obstetric simulation, Built with everyday technology

**Features:** Vision Pro support

**In-app purchases:** none


### OEI Sim Pro

[App page](https://appshunter.io/ios/app/oei-sim-pro/id1576212260)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is CTGi free?

CTGi is free to download, with no in-app purchases.

### Is OEI Sim Pro free?

OEI Sim Pro is free to download, with no in-app purchases.

### Do CTGi or OEI Sim Pro have ads?

Neither CTGi nor OEI Sim Pro shows ads.

### Which is updated more often, CTGi or OEI Sim Pro?

CTGi ships an update every 3 months, and OEI Sim Pro every 23 months. Most recently, CTGi was updated on September 1, 2026 and OEI Sim Pro on September 8, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*