# Ondi vs Flow State Cycle

The clearest difference is in-app purchases: Flow State Cycle at none against Ondi's 1. Ondi's advantage is update cadence (weekly vs fortnightly). On price, ads, device support and iOS requirement there is nothing between them.

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

Ondi ships an update weekly, Flow State Cycle fortnightly. The most recent releases landed on October 17, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Ondi | Flow State Cycle |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/flow-state-cycle/id6762103850/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Weekly** | Fortnightly |
| Monetization | — | Free |
| Size | 10 MB | 47 MB |
| Requires iOS | 17.0 | **16.4** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 12+ | 4+ |
| Developer | [Blue Flame Games](https://appshunter.io/developer/523824138) | [Brett East](https://appshunter.io/developer/1892495827) |

## 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 |


### Flow State Cycle

[App page](https://appshunter.io/ios/app/flow-state-cycle/id6762103850)

This private period tracker logs your cycle with a single tap and uses your data for smart predictions. It offers symptom and mood tracking, cycle insights, and doctor-ready reports. Your health data stays on your device, ensuring complete privacy.

**Highlights:** Smart cycle predictions, Symptom and mood logging, Cycle insights and patterns, Doctor-ready PDF reports, Health ecosystem sync, CSV data export, Dark mode support

**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 Flow State Cycle free?

Flow State Cycle is free to download, with no in-app purchases.

### Do Ondi or Flow State Cycle have ads?

Neither Ondi nor Flow State Cycle shows ads.

### Which is updated more often, Ondi or Flow State Cycle?

Ondi ships an update weekly, and Flow State Cycle fortnightly. Most recently, Ondi was updated on October 17, 2026 and Flow State Cycle on October 25, 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.*