# Flu vs Iris

The clearest difference is ads: Flu at none against Iris's shown. Flu also leads on iOS requirement (15.1 vs 17.0). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Flu sells 2 in-app purchases, starting at $1.99 per month and Iris sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | Flu | Iris |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.5 (2 ratings)](https://appshunter.io/ios/app/iris-period-and-cycle-tracker/id6761134901/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | — | Every 9 days |
| Monetization | — | Free with in-app purchases |
| Size | 56 MB | 10 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Robison Fabiano](https://appshunter.io/developer/1886478718) | [Arbaz Siddiqui](https://appshunter.io/developer/1887947140) |

## What reviewers say

### Flu

[App page](https://appshunter.io/ios/app/flu-ir/id6760839279)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Mensal | $1.99 | per month |
| Flu-ir Premium Annual | $9.99 | per year |


### Iris

[App page](https://appshunter.io/ios/app/iris-period-and-cycle-tracker/id6761134901)

This app offers comprehensive period and cycle tracking with advanced features like irregular cycle detection and personal insight generation. It prioritizes user privacy by keeping all data on the device, avoiding data sharing with advertisers. It also syncs with Apple Health and includes educational content on hormones.

**Highlights:** Period and cycle prediction, Irregular cycle tracking, Personalized insights and pattern detection, LH strip and BBT logging, Apple Health synchronization, Contraceptive and postpartum modes, Symptom and mood tracking

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Support Iris (No Ads) | $2.99 | one-time |


## Frequently asked questions

### Is Flu free?

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

### Is Iris free?

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

### Do Flu or Iris have ads?

Iris shows ads; Flu does not.

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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.*