# Cortisol App vs Isla

The clearest difference is in-app purchases: Cortisol App at none against Isla's 2. Cortisol App also leads on iOS requirement (17.6 vs 26.0). On price, ads and device support there is nothing between them.

Both are free to download. Isla sells 2 in-app purchases, starting at $4.99 per month. Cortisol App asks for nothing beyond the download.

## The numbers

| Metric | Cortisol App | Isla |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Size | 109 MB | 2 MB |
| Requires iOS | **17.6** | 26.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Synaptica Health](https://appshunter.io/developer/1853981796) | [Markus Vaha](https://appshunter.io/developer/1706287937) |

## What reviewers say

### Cortisol App

[App page](https://appshunter.io/ios/app/cortisol-app/id6755486374)

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

**In-app purchases:** none


### Isla

[App page](https://appshunter.io/ios/app/isla-nervous-system-reset/id6784335577)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Isla Premium — Monthly | $4.99 | per month |
| Isla Premium — Yearly | $29.99 | per year |


## Frequently asked questions

### Is Cortisol App free?

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

### Is Isla free?

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

### Do Cortisol App or Isla have ads?

Neither Cortisol App nor Isla 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.*