# CalmFlow vs Olla Period App

The clearest difference is update cadence: Olla Period App at every 3 days against CalmFlow's every 3 months. CalmFlow's advantage is device support (3 vs 1) and iOS requirement (15.1 vs 26.5). On price, ads and in-app purchases there is nothing between them.

Both are free to download. CalmFlow sells 2 in-app purchases, starting at $4.99 per month and Olla Period App sells 2 in-app purchases, starting at $2.99 per 7 days. Whichever you choose, the download price is not the number that matters.

CalmFlow ships an update every 3 months, Olla Period App every 3 days. Both last shipped on October 31, 2026.

## The numbers

| Metric | CalmFlow | Olla Period App |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 days** |
| Size | 52 MB | 16 MB |
| Requires iOS | **15.1** | 26.5 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [Mark Mager](https://appshunter.io/developer/1874161456) | [Katja Nina Kolari](https://appshunter.io/developer/1839369029) |

## What reviewers say

### CalmFlow

[App page](https://appshunter.io/ios/app/calmflow-menopause-tracker/id6759929944)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| CalmFlow Pro Monthly | $4.99 | per month |
| CalmFlow Pro Yearly | $29.99 | per year |


### Olla Period App

[App page](https://appshunter.io/ios/app/olla-period-app/id6810021264)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Olla Weekly Subscription | $2.99 | per 7 days |
| Olla Annual | $19.99 | per year |


## Frequently asked questions

### Is CalmFlow free?

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

### Is Olla Period App free?

Olla Period App is free to download, with in-app purchases available.

### Do CalmFlow or Olla Period App have ads?

Neither CalmFlow nor Olla Period App shows ads.

### Which is updated more often, CalmFlow or Olla Period App?

CalmFlow ships an update every 3 months, and Olla Period App every 3 days. Most recently, CalmFlow was updated on October 31, 2026 and Olla Period App on October 31, 2026.

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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.*