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Screenshots

  • HIIT Flow - Monster Muscles screenshot 1
  • HIIT Flow - Monster Muscles screenshot 2
  • HIIT Flow - Monster Muscles screenshot 3
  • HIIT Flow - Monster Muscles screenshot 4

About HIIT Flow - Monster Muscles

Sick of bloated workout apps with endless onboarding and surprise fees? Me too. That’s why I made this. Just a simple HIIT workout app with no onboarding, basic customization, and effective exercises. Monster Muscle HIIT is a no-nonsense workout app designed to get you moving immediately. No accounts, no tracking, no subscriptions, no annoying intros. Just a quick HIIT session that fits into your workout, or anytime you need a fast, effective burn. Why I Made This: Every HIIT app I tried had a 30-minute-long onboarding process where you enter your life's story only to be hit with a subscription fee at the end of it all. There's nothing more annoying than sitting in the gym trying to find an app that works, going through a whole questionnaire, and then being hit with a paywall before you can even see your workout. Even after all the questioning and fees, the workouts were always the same cookie-cutter sets. So I built this app out of pure frustration. What You Get: -Instant access to a customizable HIIT timer -Zero onboarding; just open and start. What you see in the preview is exactly what you get. -No subscriptions. No ads. No fluff. -One-time $2.99 purchase. That’s the only fee you'll ever pay. I’m not trying to make a profit. I’m not collecting your data. I just wanted a simple HIIT tool that respected my time, and maybe yours too if you choose to download it.

App privacy

The developer, Emmalina Calcaterra, reported these privacy practices to Apple.

Data Not Collected

The developer does not collect any data from this app.

Alternatives to HIIT Flow - Monster Muscles

Looking for apps like HIIT Flow - Monster Muscles? Here are 6 similar apps on the App Store. The highest rated is Ritmo Timer (5.0/5), and all 6 are free to download.

HIIT Flow - Monster Muscles vs. alternatives
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HIIT Flow - Monster Muscles 5.0 / 5 (2 ratings) 2.99 USD September 15, 2025
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