# Calla vs Flowly

The clearest difference is rating: Flowly at 5.0 against Calla's 4.4. Calla's advantage is in-app purchases (none vs 3) and ratings volume (5 vs 1). On price, ads and device support there is nothing between them.

Both are free to download. Flowly sells 3 in-app purchases, starting at $1.99 per 7 days. Calla asks for nothing beyond the download.

Flowly 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 | Calla | Flowly |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (5 ratings)](https://appshunter.io/ios/app/calla-period-tracker/id6761502864/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/flowly-period-tracker/id6787769946/reviews)** |
| Number of ratings | **5** | 1 |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Monetization | **Free** | Freemium |
| Size | 33 MB | 13 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 12+ | 4+ |
| Developer | [Roxana Heitz](https://appshunter.io/developer/1890019363) | [Ilayda Gulec](https://appshunter.io/developer/1690989414) |

## What reviewers say

### 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


### Flowly

[App page](https://appshunter.io/ios/app/flowly-period-tracker/id6787769946)

This app offers private period and ovulation tracking with personalized insights. It helps predict your cycle, fertile days, and symptoms with smart reminders and customizable themes. Data is stored locally for enhanced privacy.

**Highlights:** Period and cycle prediction, Ovulation and fertile window forecasts, Symptom and mood tracking, Personalized health insights, Smart reminders, PDF health reports, Customizable themes and pets

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Weekly | $1.99 | per 7 days |
| Pro Monthly | $3.99 | per month |
| Pro Yearly | $9.99 | per year |


## Frequently asked questions

### Is Calla free?

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

### Is Flowly free?

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

### Which has better reviews, Calla or Flowly?

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

### Do Calla or Flowly have ads?

Neither Calla nor Flowly 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.*