# FlowHer vs Calla

The clearest difference is rating: FlowHer at 5.0 against Calla's 4.3. Calla's advantage is in-app purchases (none vs 8) and ratings volume (6 vs 1). On price, ads and device support there is nothing between them.

Both are free to download. FlowHer sells 8 in-app purchases, starting at $7.99 per month. Calla asks for nothing beyond the download.

FlowHer holds the better App Store score, 5.0 against 4.3. That said, the two scores are not equally well evidenced: Calla has 6 ratings behind it against 1, so its average is the more settled of the two.

## The numbers

| Metric | FlowHer | Calla |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/flowher-period-tracker/id6758593905/reviews)** | [4.3 (6 ratings)](https://appshunter.io/ios/app/calla-period-tracker/id6761502864/reviews) |
| Number of ratings | 1 | **6** |
| Positive reviews | 96.7% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 days | — |
| Monetization | Freemium | **Free** |
| Size | 136 MB | 33 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone, Apple Watch | iPhone, iPod |
| Age rating | 12+ | 12+ |
| Developer | [Hangzhou Dayu Technology Co., Limited](https://appshunter.io/developer/1873856836) | [Roxana Heitz](https://appshunter.io/developer/1890019363) |

## What reviewers say

### FlowHer

[App page](https://appshunter.io/ios/app/flowher-period-tracker/id6758593905)

This app helps women track their menstrual cycles, recovery, sleep, and wellness patterns. It offers insights into how the body changes throughout the cycle and integrates with Apple Watch and Health data for a comprehensive view.

**Highlights:** Period and symptom tracking, Cycle and fertility predictions, Sleep and stress insights, Apple Watch and Health integration, AI wellness assistant, Recovery reports and trends

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support, iPhone Duo support

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| FlowHer Monthly Premium | $7.99 | per month |
| FlowHer Annual Limited | $9.99 | per year |
| FlowHer Annual Special | $17.99 | per year |
| FlowHer Annual Premium | $29.99 | per year |
| 2 AI Theme Generation Credits | $0.99 | one-time |
| 5 AI Theme Generation Credits | $1.99 | one-time |
| 10 AI Theme Generation Credits | $2.99 | one-time |
| FlowHer Lifetime Premium | $69.99 | one-time |


### 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 FlowHer free?

FlowHer 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, FlowHer or Calla?

FlowHer is rated higher. FlowHer averages 5.0 out of 5 from 1 ratings, while Calla averages 4.3 from 6 ratings.

### Do FlowHer or Calla have ads?

Neither FlowHer 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.*