# Cortisol Index vs byeloop

The clearest difference is in-app purchases: byeloop at none against Cortisol Index's 1. byeloop also leads on ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. Cortisol Index sells 1 in-app purchase, starting at $1.99 per month. byeloop asks for nothing beyond the download.

Cortisol Index ships an update every 6 weeks, byeloop every 3 months. The most recent releases landed on October 3, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Cortisol Index | byeloop |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/cortisol-index/id6743096400/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 6 weeks** | Every 3 months |
| Monetization | Free with in-app purchases | — |
| Size | 24 MB | 29 MB |
| Requires iOS | 16.6 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Jonathan Goldman](https://appshunter.io/developer/1774235948) | [Alex Sassella](https://appshunter.io/developer/1858483906) |

## What reviewers say

### Cortisol Index

[App page](https://appshunter.io/ios/app/cortisol-index/id6743096400)

This fun, AI-powered photo app playfully analyzes your picture to generate an aura reading, vibe description, and a humorous stress score. It's designed purely for entertainment, allowing you to share your results with friends or on social media.

**Highlights:** AI Aura Reading, Vibe Description, Humorous Stress Score, Overlay Captions, Shareable Results, Photo Analysis

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $1.99 | per month |


### byeloop

[App page](https://appshunter.io/ios/app/byeloop/id6756094444)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Cortisol Index free?

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

### Is byeloop free?

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

### Do Cortisol Index or byeloop have ads?

Cortisol Index shows ads; byeloop does not.

### Which is updated more often, Cortisol Index or byeloop?

Cortisol Index ships an update every 6 weeks, and byeloop every 3 months. Most recently, Cortisol Index was updated on October 3, 2026 and byeloop on October 10, 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.*