# Cardio Conversion vs ErgSwap

The clearest difference is in-app purchases: ErgSwap at none against Cardio Conversion's 1. Cardio Conversion's advantage is device support (3 vs 1) and iOS requirement (15.1 vs 18.0). On price, update cadence and ads there is nothing between them.

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

Both ship on a similar rhythm, roughly weekly. The most recent releases landed on October 6, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Cardio Conversion | ErgSwap |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/ergswap-cardio-converter/id6801896245/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Weekly | Weekly |
| Monetization | — | Free |
| Size | 33 MB | 3 MB |
| Requires iOS | **15.1** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Ryan Rodemoyer](https://appshunter.io/developer/1738774695) | [STEPHEN P JOHNSTON](https://appshunter.io/developer/1896309887) |

## What reviewers say

### 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 |


### ErgSwap

[App page](https://appshunter.io/ios/app/ergswap-cardio-converter/id6801896245)

Easily convert cardio workouts between different machines. Input your intended exercise and distance/calories, and get equivalent efforts for running, rowing, skiing, and biking. Supports various models and units, with options for scaled or flat conversions.

**Highlights:** Convert workouts between machines, Supports running, rowing, skiing, and biking, Handles distance and calorie inputs, Provides machine-specific units, Offers scaled and flat conversion options, Share workout conversions

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

**In-app purchases:** none


## Frequently asked questions

### Is Cardio Conversion free?

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

### Is ErgSwap free?

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

### Do Cardio Conversion or ErgSwap have ads?

Neither Cardio Conversion nor ErgSwap shows ads.

### Which is updated more often, Cardio Conversion or ErgSwap?

Cardio Conversion ships an update weekly, and ErgSwap weekly. Most recently, Cardio Conversion was updated on October 6, 2026 and ErgSwap on October 8, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*