# Flux vs Owain

The clearest difference is iOS requirement: Flux at 15.1 against Owain's 18.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Flux sells 2 in-app purchases, starting at $19.99 per month and Owain sells 2 in-app purchases, starting at $12.99 per month. Whichever you choose, the download price is not the number that matters.

Flux ships an update every 6 weeks, Owain every 5 weeks. The most recent releases landed on September 27, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | Flux | Owain |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 5 weeks** |
| Size | 40 MB | 22 MB |
| Requires iOS | **15.1** | 18.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Anthony Awdi](https://appshunter.io/developer/1890533867) | [Antoine Faessel](https://appshunter.io/developer/1896574486) |

## What reviewers say

### Flux

[App page](https://appshunter.io/ios/app/flux-men-cycle-tracker/id6761628489)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Flux Premium | $19.99 | per month |
| Flux Premium | $119.99 | per year |


### Owain

[App page](https://appshunter.io/ios/app/owain/id6768453074)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Owain Pro Monthly | $12.99 | per month |
| Owain Pro Annual | $44.99 | per year |


## Frequently asked questions

### Is Flux free?

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

### Is Owain free?

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

### Do Flux or Owain have ads?

Neither Flux nor Owain shows ads.

### Which is updated more often, Flux or Owain?

Flux ships an update every 6 weeks, and Owain every 5 weeks. Most recently, Flux was updated on September 27, 2026 and Owain on September 13, 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.*