# TC3Sim vs Co

The clearest difference is update cadence: Co at every 3 months against TC3Sim's every 20 months. TC3Sim's advantage is iOS requirement (16.0 vs 18.0). 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.

TC3Sim ships an update every 20 months, Co every 3 months. The most recent releases landed on July 7, 2026 and September 4, 2026 respectively.

## The numbers

| Metric | TC3Sim | Co |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.7 (3 ratings)](https://appshunter.io/ios/app/tc3sim/id1517825914/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 20 months | **Every 3 months** |
| Monetization | Free | — |
| Size | 613 MB | 30 MB |
| Requires iOS | **16.0** | 18.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 17+ | 17+ |
| Developer | [Engineering & Computer Simulations Inc](https://appshunter.io/developer/1115288881) | [Allogy Interactive](https://appshunter.io/developer/357433598) |

## What reviewers say

### TC3Sim

[App page](https://appshunter.io/ios/app/tc3sim/id1517825914)

This medical simulation game reinforces tactical combat casualty care training through story-driven scenarios. Players assess casualties, perform triage, and administer treatments in various combat environments, learning essential procedures for military medical personnel.

**Highlights:** Tactical Combat Casualty Care training, Story-driven scenarios, Casualty assessment, Triage and treatment, Multiple military branches, Combat environments

**Features:** macOS Compatibility

**In-app purchases:** none


### Co

[App page](https://appshunter.io/ios/app/co-responder/id6756629882)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is TC3Sim free?

TC3Sim is free to download, with no in-app purchases.

### Is Co free?

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

### Do TC3Sim or Co have ads?

Neither TC3Sim nor Co shows ads.

### Which is updated more often, TC3Sim or Co?

TC3Sim ships an update every 20 months, and Co every 3 months. Most recently, TC3Sim was updated on July 7, 2026 and Co on September 4, 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.*