# The Sup App vs Athyx

The clearest difference is in-app purchases: Athyx at none against The Sup App's 2. Athyx also leads on update cadence (every 2 days vs every 4 months) and device support (4 vs 2). On price, ads and iOS requirement there is nothing between them.

Both are free to download. The Sup App sells 2 in-app purchases, starting at $9.99 per month. Athyx asks for nothing beyond the download.

The Sup App ships an update every 4 months, Athyx every 2 days. The most recent releases landed on October 25, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | The Sup App | Athyx |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[2.3 (3 ratings)](https://appshunter.io/ios/app/athyx/id6760621883/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 days** |
| Monetization | — | Free |
| Size | 29 MB | 21 MB |
| Requires iOS | 16.6 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 17+ | 4+ |
| Developer | [Kona Sports by Kona Windsurfing AB](https://appshunter.io/developer/1795955862) | [Athyx, Inc.](https://appshunter.io/developer/1885372082) |

## What reviewers say

### The Sup App

[App page](https://appshunter.io/ios/app/the-sup-app/id6741865824)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium monthly | $9.99 | per month |
| Premium annual | $89.99 | per year |


### Athyx

[App page](https://appshunter.io/ios/app/athyx/id6760621883)

This app helps athletes estimate training intensity by capturing lactate data. It offers a simple interface to track key training insights and review past sessions. Educational content provides general information on training concepts and performance metrics.

**Highlights:** Lactate capture for training intensity estimation, Track key training insights, Simple interface for athletes, Review past session history, Educational content on training concepts

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

**In-app purchases:** none


## Frequently asked questions

### Is The Sup App free?

The Sup App is free to download, with in-app purchases available.

### Is Athyx free?

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

### Do The Sup App or Athyx have ads?

Neither The Sup App nor Athyx shows ads.

### Which is updated more often, The Sup App or Athyx?

The Sup App ships an update every 4 months, and Athyx every 2 days. Most recently, The Sup App was updated on October 25, 2026 and Athyx on October 31, 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.*