# Passion Iron vs Cardio Conversion

The clearest difference is in-app purchases: Passion Iron at none against Cardio Conversion's 1. Cardio Conversion's advantage is update cadence (weekly vs monthly). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Cardio Conversion sells 1 one-off in-app purchase. Passion Iron asks for nothing beyond the download.

Passion Iron ships an update monthly, Cardio Conversion weekly. The most recent releases landed on October 17, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Passion Iron | Cardio Conversion |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Weekly** |
| Size | 54 MB | 33 MB |
| Requires iOS | 15.6 | **15.1** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [TrantorMind s.r.l](https://appshunter.io/developer/1331878308) | [Ryan Rodemoyer](https://appshunter.io/developer/1738774695) |

## What reviewers say

### Passion Iron

[App page](https://appshunter.io/ios/app/passion-iron/id6474903085)

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


### Cardio Conversion

[App page](https://appshunter.io/ios/app/cardio-conversion/id6480349250)

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Unlock | $4.99 | one-time |


## Frequently asked questions

### Is Passion Iron free?

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

### Is Cardio Conversion free?

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

### Do Passion Iron or Cardio Conversion have ads?

Neither Passion Iron nor Cardio Conversion shows ads.

### Which is updated more often, Passion Iron or Cardio Conversion?

Passion Iron ships an update monthly, and Cardio Conversion weekly. Most recently, Passion Iron was updated on October 17, 2026 and Cardio Conversion on October 6, 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.*