# Period and Ovulation Tracker vs Calla

The clearest difference is in-app purchases: Calla at none against Period and Ovulation Tracker's 1. Calla also leads on rating (4.3 vs 4.0). On price, ratings volume, ads and device support there is nothing between them.

Both are free to download. Period and Ovulation Tracker sells 1 in-app purchase, starting at $9.99 per 7 days. Calla asks for nothing beyond the download.

Calla holds the better App Store score, 4.3 against 4.0. Both are backed by a comparable volume of ratings — 4 and 6 respectively.

## The numbers

| Metric | Period and Ovulation Tracker | Calla |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (4 ratings)](https://appshunter.io/ios/app/period-and-ovulation-tracker/id1661911018/reviews) | **[4.3 (6 ratings)](https://appshunter.io/ios/app/calla-period-tracker/id6761502864/reviews)** |
| Number of ratings | 4 | **6** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Monthly | — |
| Monetization | Subscription | **Free** |
| Size | 93 MB | 33 MB |
| Requires iOS | **14.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 12+ | 12+ |
| Developer | [Dmytro Melnichenko](https://appshunter.io/developer/1661137284) | [Roxana Heitz](https://appshunter.io/developer/1890019363) |

## What reviewers say

### Period and Ovulation Tracker

[App page](https://appshunter.io/ios/app/period-and-ovulation-tracker/id1661911018)

This app helps women track their menstrual cycles, predict ovulation, and manage fertility. It provides notifications for upcoming periods and contraceptive pills, along with a notepad for recording symptoms and early pregnancy signs.

**Highlights:** Track menstrual cycles, Predict ovulation and fertility windows, Receive period and pill reminders, Log symptoms and notes, View cycle history and forecasts, Manage health records

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Women's calendar | $9.99 | per 7 days |


### 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 Period and Ovulation Tracker free?

Period and Ovulation Tracker is free to download, with in-app purchases available.

### Is Calla free?

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

### Which has better reviews, Period and Ovulation Tracker or Calla?

Calla is rated higher. Period and Ovulation Tracker averages 4.0 out of 5 from 4 ratings, while Calla averages 4.3 from 6 ratings.

### Do Period and Ovulation Tracker or Calla have ads?

Neither Period and Ovulation 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.*