HIIT Flow - Monster Muscles
Emmalina Calcaterra Health & Fitness iPhoneiPadiPod touch
HIIT Flow - Monster Muscles is a paid Health & Fitness app for iPhone and iPad by Emmalina Calcaterra. Rated 5.0/5 from 2 ratings. Requires iOS 14.0.
- Rating
- 5.0
- 2 ratings
- Price
- 2.99 USD
- on the App Store
- Size
- 28 MB
- Age 4+
- Updated
- Sep 15
- 2025 · v1.0
Screenshots
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.
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| App | Rating | Price | Last updated | Compare |
|---|---|---|---|---|
| HIIT Flow - Monster Muscles | 5.0 / 5 (2 ratings) | 2.99 USD | September 15, 2025 | |
| Ritmo Timer | 5.0 / 5 (1) | Free | Aug 19, 2026 | Compare |
| Alto - Build Lasting Habits | 4.0 / 5 (1) | Free | Aug 24, 2026 | Compare |
| Goal Tracker: Zen Goals | 5.0 / 5 (1) | Free | Aug 19, 2026 | Compare |
| Processed Food Scanner - Kale | 5.0 / 5 (2) | Free | Apr 21, 2026 | Compare |
| Posture Pro: Fix Tech Neck | 5.0 / 5 (3) | Free | Jul 21, 2026 | Compare |
| Pilgrim — Mindful Walking | 5.0 / 5 (6) | Free | Sep 24, 2026 | Compare |