# Cortrium C3 vs EZY iSee

The clearest difference is iOS requirement: Cortrium C3 at 12.0 against EZY iSee's 14.0. On price, update cadence, ads and in-app purchases there is nothing between them.

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

Cortrium C3 ships an update every 11 months, EZY iSee every 15 months. The most recent releases landed on September 9, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | Cortrium C3 | EZY iSee |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 11 months** | Every 15 months |
| Size | 24 MB | 5 MB |
| Requires iOS | **12.0** | 14.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Cortrium ApS](https://appshunter.io/developer/909412468) | [SIGKNOW BIOMEDICAL CO., LTD.](https://appshunter.io/developer/1676213374) |

## What reviewers say

### Cortrium C3

[App page](https://appshunter.io/ios/app/cortrium-c3/id1480354424)

**Features:** macOS Compatibility

**In-app purchases:** none


### EZY iSee

[App page](https://appshunter.io/ios/app/ezy-isee/id6446137032)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Cortrium C3 free?

Cortrium C3 is free to download, with no in-app purchases.

### Is EZY iSee free?

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

### Do Cortrium C3 or EZY iSee have ads?

Neither Cortrium C3 nor EZY iSee shows ads.

### Which is updated more often, Cortrium C3 or EZY iSee?

Cortrium C3 ships an update every 11 months, and EZY iSee every 15 months. Most recently, Cortrium C3 was updated on September 9, 2026 and EZY iSee on September 18, 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.*