# sprig vs Calla

The clearest difference is update cadence: Calla at every 4 days against sprig's fortnightly. Calla also leads on iOS requirement (16.4 vs 26.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. sprig sells 3 in-app purchases, starting at $3.99 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.

sprig ships an update fortnightly, Calla every 4 days. The most recent releases landed on November 5, 2026 and November 10, 2026 respectively.

## The numbers

| Metric | sprig | Calla |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 4 days** |
| Size | 17 MB | 69 MB |
| Requires iOS | 26.0 | **16.4** |
| Devices | iPhone | iPhone |
| Age rating | 17+ | 12+ |
| Developer | [CLEMENTE JOS ORTUZAR ORELLANA](https://appshunter.io/developer/1856562151) | [Arman Malkhasyan](https://appshunter.io/developer/6804423803) |

## What reviewers say

### sprig

[App page](https://appshunter.io/ios/app/sprig-fertility-tracker/id6767876289)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Sprig Plus Monthly | $3.99 | per month |
| Sprig Plus Yearly | $29.99 | per year |
| English | $49.99 | one-time |


### 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 sprig free?

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

### Is Calla free?

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

### Do sprig or Calla have ads?

Neither sprig nor Calla shows ads.

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

sprig ships an update fortnightly, and Calla every 4 days. Most recently, sprig was updated on November 5, 2026 and Calla on November 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.*