# 20 Pull Ups Trainer Challenge vs Muscle Booster Workout Tracker

The clearest difference is ratings volume: Muscle Booster Workout Tracker at 138K against 20 Pull Ups Trainer Challenge's 890. Muscle Booster Workout Tracker also leads on update cadence (every 2 weeks vs every 2 months) and chart position (#67 vs unranked). On price, rating, review sentiment and ads there is nothing between them.

Both are free to download. 20 Pull Ups Trainer Challenge sells 3 in-app purchases, starting at $4.99 per month 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.

On the App Store both sit at effectively the same score — 4.6 for 20 Pull Ups Trainer Challenge against 4.5 for Muscle Booster Workout Tracker. That said, the two scores are not equally well evidenced: Muscle Booster Workout Tracker has 138K ratings behind it against 890, so its average is the more settled of the two. Written reviews are what separate them: 48% of 20 Pull Ups Trainer Challenge's written reviews are positive against 43% of Muscle Booster Workout Tracker's.

20 Pull Ups Trainer Challenge ships an update every 2 months, Muscle Booster Workout Tracker every 2 weeks. The most recent releases landed on September 17, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | 20 Pull Ups Trainer Challenge | Muscle Booster Workout Tracker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (890 ratings)](https://appshunter.io/ios/app/20-pull-ups-trainer-challenge/id848897098/reviews)** | [4.5 (138K ratings)](https://appshunter.io/ios/app/muscle-booster-workout-tracker/id1446447749/reviews) |
| Number of ratings | 890 | **138K** |
| Positive reviews | **48.5% of reviews** | 43.5% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Best chart rank | — | **#67** |
| Size | 71 MB | 574 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | iPhone, iPad | iPhone, Apple Watch |
| Age rating | 4+ | 17+ |
| Developer | [Zen Labs](https://appshunter.io/developer/485971738) | [WELLTECH APPS LIMITED](https://appshunter.io/developer/1450265454) |

## What reviewers say

### 20 Pull Ups Trainer Challenge

[App page](https://appshunter.io/ios/app/20-pull-ups-trainer-challenge/id848897098)

This app guides users to achieve 20 pull-ups in 6 weeks with a proven program suitable for all fitness levels. It offers voice cues, progress tracking, and motivational features. The first two weeks are free, with subscription options available for full access.

**Highlights:** Achieve 20 pull-ups in 6 weeks, Program for all fitness levels, Voice cues for guidance, Badges and awards for workouts, Social sharing of progress, Motivational music

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Zen Unlimited Pass Monthly | $4.99 | per month |
| Zen Power Playlist 3 Months | $29.99 | per 3 months |
| Zen Unlimited Pass Annual | $74.99 | per year |

**What reviewers like**

- 👍 Easy to use
- 🚀 Well-planned app
- 💪 Helps improve pull-ups
- 🎉 Great for military/fitness goals

**What reviewers complain about**

- 💰 Subscription model change after purchase
- 🔒 Locked out of paid features after update
- 🤔 Unclear progression for beginners
- ⏱️ Timer issues (stops when switching apps)

**Reported bugs**

- App crashes
- Compatibility issues with older devices

**Requested features**

- Ability to track incomplete workouts
- Option to start at beginner, intermediate, or advanced level
- Ability to combine multiple Zen apps (push-ups, squats, etc.) into circuits


### Muscle Booster Workout Tracker

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

**Currently charting:** #67 Top Grossing · Health & Fitness, #112 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 20 Pull Ups Trainer Challenge free?

20 Pull Ups Trainer Challenge 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, 20 Pull Ups Trainer Challenge or Muscle Booster Workout Tracker?

20 Pull Ups Trainer Challenge is rated higher. 20 Pull Ups Trainer Challenge averages 4.6 out of 5 from 890 ratings, while Muscle Booster Workout Tracker averages 4.5 from 138K ratings.

### Do 20 Pull Ups Trainer Challenge or Muscle Booster Workout Tracker have ads?

Neither 20 Pull Ups Trainer Challenge nor Muscle Booster Workout Tracker shows ads.

### Which is updated more often, 20 Pull Ups Trainer Challenge or Muscle Booster Workout Tracker?

20 Pull Ups Trainer Challenge ships an update every 2 months, and Muscle Booster Workout Tracker every 2 weeks. Most recently, 20 Pull Ups Trainer Challenge was updated on September 17, 2026 and Muscle Booster Workout Tracker on September 25, 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.*