# Muna Flow vs Op.Dr. Bahar Çelen

The clearest difference is in-app purchases: Op.Dr. Bahar Çelen at none against Muna Flow's 2. Op.Dr. Bahar Çelen also leads on ads (none vs shown) and iOS requirement (12.0 vs 16.0). On price, update cadence and device support there is nothing between them.

Both are free to download. Muna Flow sells 2 in-app purchases, starting at $0.99 per month. Op.Dr. Bahar Çelen asks for nothing beyond the download.

Muna Flow ships an update every 2 weeks, Op.Dr. Bahar Çelen every 6 days. The most recent releases landed on October 27, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Muna Flow | Op.Dr. Bahar Çelen |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 2 weeks | **Every 6 days** |
| Size | 106 MB | 67 MB |
| Requires iOS | 16.0 | **12.0** |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod |
| Age rating | 17+ | 17+ |
| Developer | [Zeynep Ozturk](https://appshunter.io/developer/1653095862) | [Op.Dr. Bahar Çelen](https://appshunter.io/developer/1831599154) |

## What reviewers say

### Muna Flow

[App page](https://appshunter.io/ios/app/muna-flow-period-tracker/id6748830210)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Muna Flow Premium | $0.99 | per month |
| Premium | $6.99 | per year |


### Op.Dr. Bahar Çelen

[App page](https://appshunter.io/ios/app/opdr-bahar-celen/id6749650251)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Muna Flow free?

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

### Is Op.Dr. Bahar Çelen free?

Op.Dr. Bahar Çelen is free to download, with no in-app purchases.

### Do Muna Flow or Op.Dr. Bahar Çelen have ads?

Muna Flow shows ads; Op.Dr. Bahar Çelen does not.

### Which is updated more often, Muna Flow or Op.Dr. Bahar Çelen?

Muna Flow ships an update every 2 weeks, and Op.Dr. Bahar Çelen every 6 days. Most recently, Muna Flow was updated on October 27, 2026 and Op.Dr. Bahar Çelen on October 24, 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.*