# HIIT Flow - Monster Muscles — Simple HIIT - no subscription

> Simple, customizable HIIT timer app with a one-time purchase. (iPhone/iPad app by Emmalina Calcaterra.)

- Source: https://appshunter.io/ios/app/hiit-flow-monster-muscles/id6751553226 (this page in markdown: same URL + `.md`)
- Developer: [Emmalina Calcaterra](https://appshunter.io/developer/1835778694)
- Category: Health & Fitness, Lifestyle
- Price: $2.99
- Rating: 5.00/5 from 2 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 14.0 · 28 MB
- Languages: American English
- Released: 2025-09-15
- Data updated: 2026-07-03
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/hiit-flow-monster-muscles/id6751553226/reviews.md

## What is HIIT Flow?

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.

## Key features

- Customizable HIIT timer
- Instant workout access
- No onboarding required
- No subscriptions or ads
- One-time purchase

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/hiit-flow-monster-muscles/id6751553226/reviews.md

### 5/5 — So easy to use

*2025-10-05*

This app was so easy to use! Most workout apps take so much time to set up and are really clunky. This one is extremely easy to use and lets you start your first workout without messing around. You just download it and begin. It is a great choice for anyone who just wants to get a solid workout

## Frequently asked questions about HIIT Flow

### Does HIIT Flow have ads?

No, HIIT Flow - Monster Muscles is completely ad-free. The developer explicitly states 'No ads' as a key feature, ensuring an uninterrupted workout experience.

### What is the cost of HIIT Flow?

HIIT Flow - Monster Muscles is a paid app with a one-time purchase price of $2.99. This is the only fee you will ever pay, with no subscriptions or hidden costs.

### How does HIIT Flow compare to other HIIT apps?

HIIT Flow is designed to be simpler than many alternatives, offering zero onboarding and instant access to workouts. It avoids the lengthy setup processes and surprise subscription fees often found in other HIIT applications.

### What devices does HIIT Flow support?

HIIT Flow - Monster Muscles is available on iPhone, iPad, and iPod. It is designed for Apple mobile devices.

### How often is HIIT Flow updated?

The app was last updated on September 15, 2025, with version 1.0. This indicates it is a new release, and future updates will depend on user feedback and developer plans.

### What age rating does HIIT Flow have?

HIIT Flow - Monster Muscles has an age rating of 4+. This means it is suitable for users of all ages, with no mature content.

### Can I customize workouts in HIIT Flow?

Yes, HIIT Flow - Monster Muscles offers basic customization for its HIIT timer. While it focuses on simplicity, users can adjust elements of their workout sessions.

### Does HIIT Flow track my progress?

No, HIIT Flow - Monster Muscles does not include tracking features. The app is designed for immediate use without account creation or data collection, focusing solely on providing a workout timer.

## Version history (last 1 release)

### 1.0 — 2025-09-15

No release notes.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-03.*