# HIIT vs Muscle Booster Workout Tracker

The clearest difference is review sentiment: HIIT at 91% against Muscle Booster Workout Tracker's 43%. HIIT also leads on rating (4.8 vs 4.5). Muscle Booster Workout Tracker's advantage is ads (none vs shown) and chart position (#61 vs unranked). On price, in-app purchases, monetization model and device support there is nothing between them.

Both are free to download. HIIT sells 11 in-app purchases, starting at $2.99 per 7 days and Muscle Booster Workout Tracker sells 16 in-app purchases, starting at $9.99 per 7 days. Whichever you choose, the download price is not the number that matters.

HIIT holds the better App Store score, 4.8 against 4.5. Both are backed by a comparable volume of ratings — 31K and 138K respectively. Written reviews point the same way: 91% of HIIT's written reviews are positive against 43% of Muscle Booster Workout Tracker's.

HIIT ships an update monthly, Muscle Booster Workout Tracker every 2 weeks. Both last shipped on September 24, 2026.

## The numbers

| Metric | HIIT | Muscle Booster Workout Tracker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (31K ratings)](https://appshunter.io/ios/app/hiit-workouts-and-timer/id891535485/reviews)** | [4.5 (138K ratings)](https://appshunter.io/ios/app/muscle-booster-workout-tracker/id1446447749/reviews) |
| Number of ratings | 31K | **138K** |
| Positive reviews | **90.8% of reviews** | 43.5% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Monthly | **Every 2 weeks** |
| Monetization | Freemium | Free with in-app purchases |
| Best chart rank | — | **#61** |
| Size | 159 MB | 574 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | iPhone, iPad | iPhone, Apple Watch |
| Age rating | 4+ | 17+ |
| Developer | [Fast Builder Limited](https://appshunter.io/developer/596300475) | [WELLTECH APPS LIMITED](https://appshunter.io/developer/1450265454) |

## What reviewers say

### HIIT

[App page](https://appshunter.io/ios/app/hiit-workouts-and-timer/id891535485)

This app offers short, high-intensity interval training (HIIT) workouts that can be done anywhere with no equipment. It provides scientifically proven exercises, custom timer templates, and progress tracking to help users achieve fitness results quickly.

**Highlights:** Short, high-intensity workouts, Customizable timer templates, Step-by-step instructions, Calendar and weight tracking, Voice and video guidance, Apple Health integration

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

**In-app purchases (11)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lock-in our cheapest price! | $2.99 | per 7 days |
| 7M Pro | $2.99 | per 7 days |
| Get Yearly Premium! | $9.99 | per year |
| Interval Timer Pro + Workouts | $12.99 | per month |
| Interval Timer X premium | $19.99 | per 3 months |
| 7M Pro | $19.99 | per 3 months |
| Get Monthly Premium! | $19.99 | per month |
| Get Yearly Premium! | $19.99 | per year |
| Interval Timer X premium | $29.99 | per year |
| 7M Pro | $29.99 | per year |
| Interval Timer Pro + Workouts | $39.99 | per year |

**What reviewers like**

- 👍 Variety and flexibility of workouts
- 🚀 Easy to follow and effective workouts
- 💪 Workouts challenge users and help them see results
- 🎨 Good range of difficulty levels
- ⏱️ Convenient short workout options

**What reviewers complain about**

- 🐛 Some workouts are too easy or repetitive
- 🔇 Lack of music or audio guidance during workouts
- 💰 Concerns about paid subscription model
- 🤔 Lack of modifications or low-impact options

**Reported bugs**

- Some videos or links not working
- Occasional crashes or performance issues

**Requested features**

- Option to create custom workouts
- More workout types beyond just HIIT
- Integration with fitness tracking apps
- Ability to save favorite workouts


### Muscle Booster Workout Tracker

[App page](https://appshunter.io/ios/app/muscle-booster-workout-tracker/id1446447749)

**Currently charting:** #61 Top Grossing · Health & Fitness, #148 Top Free · Health & Fitness (US App Store)

This app acts as a personal trainer, creating customized workout plans for muscle gain, weight loss, or recovery. It offers a vast library of exercises and challenges for home or gym, adapting to your available equipment and goals.

**Highlights:** Personalized workout plans, 1000+ exercise library, Home and gym workouts, Calisthenics and weight loss plans, Workout timer and audio tips, Equipment-based plan creation, Muscle recovery guidance

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

**In-app purchases (16)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Week Subscription | $9.99 | per 7 days |
| 1 Week Subscription | $9.99 | per 7 days |
| 1 Week Subscription | $14.99 | per 7 days |
| 1 Month Premium | $14.99 | per month |
| Muscle Booster | $14.99 | per month |
| Muscle Booster Workout Premium | $19.99 | per month |
| 1 Month Subscription | $19.99 | per month |
| 1 Month 22.99 with 7-day free trial | $22.99 | per month |
| 1 Month Subscription | $24.99 | per month |
| 3 Month Subscription | $29.99 | per 3 months |
| 3 Month Premium | $39.99 | per 3 months |
| 3 Months Subscription | $39.99 | per 3 months |
| 1 Year Premium | $59.99 | per year |
| Muscle Booster Premium | $59.99 | per year |
| 12 Month Subscription | $79.99 | per year |
| Premium Bundle | $29.99 | one-time |

**What reviewers like**

- 🚀 Great workouts
- 👍 Easy to follow
- 👍 Variety of exercises
- 🚀 Customizable plans
- 👍 Helpful for beginners

**What reviewers complain about**

- 🐛 Buggy app performance
- 🔒 Lack of free trial
- 💰 Expensive subscription
- 👎 Limited gym equipment options
- 👎 Repetitive exercises

**Reported bugs**

- Workouts not logging properly
- App freezing and crashing
- Sync issues with Apple Watch
- Inaccurate exercise counting
- Inability to contact customer support

**Requested features**

- Ability to track progress and weights
- Better integration with Apple Health
- More personalized meal plans
- Ability to customize workout schedules
- Audio/voice guidance during workouts


## Frequently asked questions

### Is HIIT free?

HIIT is free to download, with in-app purchases available.

### Is Muscle Booster Workout Tracker free?

Muscle Booster Workout Tracker is free to download, with in-app purchases available.

### Which has better reviews, HIIT or Muscle Booster Workout Tracker?

HIIT is rated higher. HIIT averages 4.8 out of 5 from 31K ratings, while Muscle Booster Workout Tracker averages 4.5 from 138K ratings.

### Do HIIT or Muscle Booster Workout Tracker have ads?

HIIT shows ads; Muscle Booster Workout Tracker does not.

### Which is updated more often, HIIT or Muscle Booster Workout Tracker?

HIIT ships an update monthly, and Muscle Booster Workout Tracker every 2 weeks. Most recently, HIIT was updated on September 24, 2026 and Muscle Booster Workout Tracker on September 24, 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.*