# Ondi vs PHASES. Cycle Tracker & Diary

The clearest difference is in-app purchases: PHASES. Cycle Tracker & Diary at none against Ondi's 1. Ondi's advantage is update cadence (weekly vs every 2 months) and iOS requirement (17.0 vs 26.2). On price, ads and device support there is nothing between them.

Both are free to download. Ondi sells 1 one-off in-app purchase. PHASES. Cycle Tracker & Diary asks for nothing beyond the download.

Ondi ships an update weekly, PHASES. Cycle Tracker & Diary every 2 months. Both last shipped on November 5, 2026.

## The numbers

| Metric | Ondi | PHASES. Cycle Tracker & Diary |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Weekly** | Every 2 months |
| Size | 10 MB | 2 MB |
| Requires iOS | **17.0** | 26.2 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 12+ | 4+ |
| Developer | [Blue Flame Games](https://appshunter.io/developer/523824138) | [myNFP GmbH](https://appshunter.io/developer/466385603) |

## 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 |


### PHASES. Cycle Tracker & Diary

[App page](https://appshunter.io/ios/app/phases-cycle-tracker-and-diary/id6776305097)

**In-app purchases:** none


## Frequently asked questions

### Is Ondi free?

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

### Is PHASES. Cycle Tracker & Diary free?

PHASES. Cycle Tracker & Diary is free to download, with no in-app purchases.

### Do Ondi or PHASES. Cycle Tracker & Diary have ads?

Neither Ondi nor PHASES. Cycle Tracker & Diary shows ads.

### Which is updated more often, Ondi or PHASES. Cycle Tracker & Diary?

Ondi ships an update weekly, and PHASES. Cycle Tracker & Diary every 2 months. Most recently, Ondi was updated on November 5, 2026 and PHASES. Cycle Tracker & Diary on November 5, 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.*