# FeverMonitor vs CortexOS

The clearest difference is in-app purchases: FeverMonitor at none against CortexOS's 3. FeverMonitor also leads on iOS requirement (6.0 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. CortexOS sells 3 in-app purchases, starting at $7.99 per month. FeverMonitor asks for nothing beyond the download.

## The numbers

| Metric | FeverMonitor | CortexOS |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 5 days |
| Size | 20 MB | 32 MB |
| Requires iOS | **6.0** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 12+ | 4+ |
| Developer | [治安 张](https://appshunter.io/developer/902451785) | [Orlin Ralinov Martinov](https://appshunter.io/developer/1876655175) |

## What reviewers say

### FeverMonitor

[App page](https://appshunter.io/ios/app/fevermonitor/id939903641)

**Features:** macOS Compatibility

**In-app purchases:** none


### CortexOS

[App page](https://appshunter.io/ios/app/cortexos/id6759070325)

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly | $7.99 | per month |
| Premium Yearly | $49.99 | per year |
| Lifetime Access | $99.99 | one-time |


## Frequently asked questions

### Is FeverMonitor free?

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

### Is CortexOS free?

CortexOS is free to download, with in-app purchases available.

### Do FeverMonitor or CortexOS have ads?

Neither FeverMonitor nor CortexOS shows ads.

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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.*