# Ondi vs HerFlow

The clearest difference is in-app purchases: HerFlow at none against Ondi's 1. HerFlow also leads on iOS requirement (15.3 vs 17.0). Ondi's advantage is update cadence (weekly vs every 2 months). On price, ads and device support there is nothing between them.

Both are free to download. Ondi sells 1 one-off in-app purchase. HerFlow asks for nothing beyond the download.

Ondi ships an update weekly, HerFlow every 2 months. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Ondi | HerFlow |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Weekly** | Every 2 months |
| Size | 10 MB | 34 MB |
| Requires iOS | 17.0 | **15.3** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Blue Flame Games](https://appshunter.io/developer/523824138) | [Ernestas Raudonis](https://appshunter.io/developer/1896018464) |

## What reviewers say

### Ondi

[App page](https://appshunter.io/ios/app/ondi-private-period-tracker/id6760896784)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Cyla Premium | $7.99 | one-time |


### HerFlow

[App page](https://appshunter.io/ios/app/herflow-period-tracker/id6765635903)

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

**In-app purchases:** none


## Frequently asked questions

### Is Ondi free?

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

### Is HerFlow free?

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

### Do Ondi or HerFlow have ads?

Neither Ondi nor HerFlow shows ads.

### Which is updated more often, Ondi or HerFlow?

Ondi ships an update weekly, and HerFlow every 2 months. Most recently, Ondi was updated on November 5, 2026 and HerFlow 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.*