# Syd vs Kalibra

The clearest difference is review sentiment: Kalibra at 100% against Syd's 87%. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Syd sells 1 in-app purchase, starting at $24.99 per month and Kalibra sells 1 in-app purchase, starting at $19.99 per month. Whichever you choose, the download price is not the number that matters.

Both ship on a similar rhythm, roughly every 2 weeks. The most recent releases landed on October 20, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Syd | Kalibra |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (11 ratings)](https://appshunter.io/ios/app/syd/id1428673549/reviews)** | — |
| Number of ratings | **11** | — |
| Positive reviews | 87.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 weeks | Every 2 weeks |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 263 MB | 63 MB |
| Requires iOS | 15.1 | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [iamYiam](https://appshunter.io/developer/1428673548) | [Kalibra](https://appshunter.io/developer/1569689809) |

## What reviewers say

### Syd

[App page](https://appshunter.io/ios/app/syd/id1428673549)

This AI-powered mentor offers personalized, science-backed recommendations to help you improve your physical and emotional health, financial well-being, and social life. Access a hub of resources, gain self-awareness through AI insights, and integrate with Apple Health for comprehensive tracking.

**Highlights:** AI Life Quality Mentor Chat, Personalized Science-Backed Recommendations, Education Hub (Articles, Meditations, Recipes), AI-Powered Personal Insights, Apple Health Integration, Life Quality Index™ Tracking

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Discovery Membership | $24.99 | per month |


### Kalibra

[App page](https://appshunter.io/ios/app/kalibra/id1569689807)

This app applies physical science methods to health, quantifying and analyzing markers through precise diagnostics and advanced data analysis. It integrates with Apple Health to guide users toward a balanced physical, mental, and social well-being.

**Highlights:** Precise diagnostic measurements, Advanced data analysis, Machine learning insights, Inferential statistics, Apple Health integration, Holistic health balance guidance

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Enhanced (monthly) | $19.99 | per month |


## Frequently asked questions

### Is Syd free?

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

### Is Kalibra free?

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

### Do Syd or Kalibra have ads?

Neither Syd nor Kalibra shows ads.

### Which is updated more often, Syd or Kalibra?

Syd ships an update every 2 weeks, and Kalibra every 2 weeks. Most recently, Syd was updated on October 20, 2026 and Kalibra on October 13, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*