# Zyra vs Calla

The clearest difference is update cadence: Calla at every 4 days against Zyra's fortnightly. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Zyra sells 2 in-app purchases, starting at $7.99 per month and Calla sells 2 in-app purchases, starting at $7.99 per month. Whichever you choose, the download price is not the number that matters.

Zyra ships an update fortnightly, Calla every 4 days. The most recent releases landed on October 31, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | Zyra | Calla |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 4 days** |
| Size | 53 MB | 69 MB |
| Requires iOS | **15.5** | 16.4 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 17+ | 12+ |
| Developer | [Steep Curve](https://appshunter.io/developer/1895719088) | [Arman Malkhasyan](https://appshunter.io/developer/6804423803) |

## What reviewers say

### Zyra

[App page](https://appshunter.io/ios/app/zyra-ai-calorie-tracker/id6764502927)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Zyra Premium Monthly | $7.99 | per month |
| Zyra Premium Yearly | $29.99 | per year |


### Calla

[App page](https://appshunter.io/ios/app/calla-perimenopause-tracker/id6804423801)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Calla Pro - Monthly | $7.99 | per month |
| Calla Pro - Yearly | $39.99 | per year |


## Frequently asked questions

### Is Zyra free?

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

### Is Calla free?

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

### Do Zyra or Calla have ads?

Neither Zyra nor Calla shows ads.

### Which is updated more often, Zyra or Calla?

Zyra ships an update fortnightly, and Calla every 4 days. Most recently, Zyra was updated on October 31, 2026 and Calla on October 29, 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.*