Who makes Musku
Musku is a strength training tracker designed and built by Julien Legrand, an independent developer based in Lille, France. He looks after the app, the website and the blog.
Musku came out on the App Store in May 2026. It runs on iPhone, Apple Watch and Android, in English and French.
An independent app
Musku has no investors and no ad network, and the app shows no ads. Workout logging is free, with no time limit. An optional Premium subscription unlocks advanced statistics, AI analyses, the Claude and ChatGPT connector and unlimited workout templates.
How the blog is written
Blog articles are written by Julien Legrand. Articles on nutrition and health list their sources at the end, and every article shows its publication date and, where relevant, when it was last updated.
This content is general information. Julien Legrand is neither a doctor nor a certified coach: it does not replace advice from a health professional or a qualified trainer (see the legal notice).
Found a mistake in an article? Report it to email@musku.app, with the article's address.
Contact
- Support: email@musku.app, reply within 48 business hours (see the Support page)
- Instagram: @musku_fr
- App Store: Musku for iPhone and Apple Watch
- Google Play: Musku for Android