# Clear Period Tracker vs Calla

The clearest difference is rating: Clear Period Tracker at 5.0 against Calla's 4.4. Calla's advantage is ratings volume (5 vs 1). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Clear Period Tracker holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: Calla has 5 ratings behind it against 1, so its average is the more settled of the two.

## The numbers

| Metric | Clear Period Tracker | Calla |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/clear-period-tracker/id6754220078/reviews)** | [4.4 (5 ratings)](https://appshunter.io/ios/app/calla-period-tracker/id6761502864/reviews) |
| Number of ratings | 1 | **5** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | — |
| Monetization | Free | Free |
| Size | 51 MB | 33 MB |
| Requires iOS | 15.6 | **15.1** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 9+ | 12+ |
| Developer | [Viktor Nikolenko](https://appshunter.io/developer/1847159684) | [Roxana Heitz](https://appshunter.io/developer/1890019363) |

## What reviewers say

### Clear Period Tracker

[App page](https://appshunter.io/ios/app/clear-period-tracker/id6754220078)

Easily monitor your menstrual cycle, fertility, and daily health with accurate predictions and a simple interface. Features include a fertility calculator, secure app lock, and a personal diary for notes. Optimized for smooth performance on any device.

**Highlights:** Menstrual cycle tracking, Fertility calculator, Secure app lock with PIN, Personal diary, Widget support, Customizable themes

**Features:** macOS Compatibility

**In-app purchases:** none


### Calla

[App page](https://appshunter.io/ios/app/calla-period-tracker/id6761502864)

This app helps teens understand their menstrual cycles with privacy-focused tracking. It learns individual patterns for accurate predictions and allows logging of various symptoms to connect with cycle phases. Optional parent sharing provides a simple wellness update without revealing sensitive data.

**Highlights:** Personalized cycle predictions, Symptom and mood logging, Age-appropriate cycle insights, Prep-day period reminders, Optional parent wellness sharing, Privacy-first data storage

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Clear Period Tracker free?

Clear Period Tracker is free to download, with no in-app purchases.

### Is Calla free?

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

### Which has better reviews, Clear Period Tracker or Calla?

Clear Period Tracker is rated higher. Clear Period Tracker averages 5.0 out of 5 from 1 ratings, while Calla averages 4.4 from 5 ratings.

### Do Clear Period Tracker or Calla have ads?

Neither Clear Period Tracker nor Calla 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.*