# Muscle Tracker Mobile vs Athyx

The clearest difference is update cadence: Athyx at every 2 days against Muscle Tracker Mobile's every 3 months. Muscle Tracker Mobile's advantage is iOS requirement (13.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Muscle Tracker Mobile ships an update every 3 months, Athyx every 2 days. The most recent releases landed on October 15, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Muscle Tracker Mobile | 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 | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 days** |
| Monetization | — | Free |
| Size | 59 MB | 19 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [BRAINBIT INC.](https://appshunter.io/developer/1510548622) | [Athyx, Inc.](https://appshunter.io/developer/1885372082) |

## What reviewers say

### Muscle Tracker Mobile

[App page](https://appshunter.io/ios/app/muscle-tracker-mobile/id6468032323)

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

**In-app purchases:** none


### Athyx

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

This app helps athletes estimate training intensity by capturing lactate data. It provides insights into training sessions and offers educational content on performance metrics. Review your past activities and understand training patterns with a simple interface.

**Highlights:** Lactate data capture, Training intensity guidance, Performance metric insights, Session history review, Educational training content, Simple interface for athletes

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

**In-app purchases:** none


## Frequently asked questions

### Is Muscle Tracker Mobile free?

Muscle Tracker Mobile is free to download, with no in-app purchases.

### Is Athyx free?

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

### Do Muscle Tracker Mobile or Athyx have ads?

Neither Muscle Tracker Mobile nor Athyx shows ads.

### Which is updated more often, Muscle Tracker Mobile or Athyx?

Muscle Tracker Mobile ships an update every 3 months, and Athyx every 2 days. Most recently, Muscle Tracker Mobile was updated on October 15, 2026 and Athyx on October 25, 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.*