# HerPhase vs Calla

The clearest difference is rating: HerPhase at 4.7 against Calla's 4.3. HerPhase also leads on iOS requirement (13.0 vs 15.1). On price, ratings volume, ads and in-app purchases there is nothing between them.

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

HerPhase holds the better App Store score, 4.7 against 4.3. Both are backed by a comparable volume of ratings — 17 and 6 respectively.

## The numbers

| Metric | HerPhase | Calla |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (17 ratings)](https://appshunter.io/ios/app/herphase-period-tracker/id6759829011/reviews)** | [4.3 (6 ratings)](https://appshunter.io/ios/app/calla-period-tracker/id6761502864/reviews) |
| Number of ratings | **17** | 6 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 days | — |
| Monetization | Free | Free |
| Size | 63 MB | 33 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [yagmur tezcan](https://appshunter.io/developer/1863116091) | [Roxana Heitz](https://appshunter.io/developer/1890019363) |

## What reviewers say

### HerPhase

[App page](https://appshunter.io/ios/app/herphase-period-tracker/id6759829011)

Easily understand and manage your menstrual cycle with this intuitive tracker. Log symptoms, view predictions for your period and fertile windows, and access cycle insights in a clean calendar interface. Your data is kept private on your device.

**Highlights:** Period and cycle tracking, Predicted next period and fertile window, Daily symptom and mood logging, Cycle statistics and insights, Simple calendar view, Privacy-focused data storage

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

**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 HerPhase free?

HerPhase 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, HerPhase or Calla?

HerPhase is rated higher. HerPhase averages 4.7 out of 5 from 17 ratings, while Calla averages 4.3 from 6 ratings.

### Do HerPhase or Calla have ads?

Neither HerPhase 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.*