# Kettlebell Functional Training vs Unbreakable by Dr. John Rusin

The clearest difference is rating: Kettlebell Functional Training at 4.8 against Unbreakable by Dr. John Rusin's 3.2. Kettlebell Functional Training also leads on ratings volume (280 vs 13) and update cadence (every 2 months vs every 5 months). Unbreakable by Dr. John Rusin's advantage is in-app purchases (none vs 8). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Kettlebell Functional Training sells 8 in-app purchases, starting at $19.99 per month. Unbreakable by Dr. John Rusin asks for nothing beyond the download.

Kettlebell Functional Training holds the better App Store score, 4.8 against 3.2. That said, the two scores are not equally well evidenced: Kettlebell Functional Training has 280 ratings behind it against 13, so its average is the more settled of the two. Written reviews point the same way: 71% of Kettlebell Functional Training's written reviews are positive against 60% of Unbreakable by Dr. John Rusin's.

Kettlebell Functional Training ships an update every 2 months, Unbreakable by Dr. John Rusin every 5 months. The most recent releases landed on November 3, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Kettlebell Functional Training | Unbreakable by Dr. John Rusin |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (280 ratings)](https://appshunter.io/ios/app/kettlebell-functional-training/id1603885876/reviews)** | [3.2 (13 ratings)](https://appshunter.io/ios/app/unbreakable-by-dr-john-rusin/id6744409487/reviews) |
| Number of ratings | **280** | 13 |
| Positive reviews | **70.6% of reviews** | 60.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 5 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 96 MB | 41 MB |
| Requires iOS | 16.6 | **15.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Adriell Mayes](https://appshunter.io/developer/1603885878) | [John Rusin](https://appshunter.io/developer/1807540567) |

## What reviewers say

### Kettlebell Functional Training

[App page](https://appshunter.io/ios/app/kettlebell-functional-training/id1603885876)

Achieve your fitness goals with custom workout programs designed for an integrated, balanced approach. This app focuses on varied exercises to prevent injuries and plateaus, maximizing your results and motivating you to move, look, and feel your best.

**Highlights:** Custom workout programs, Integrated, balanced approach, Exercise variety, Injury risk minimization, Plateau prevention, Motivation tools

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

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Memberships | $19.99 | per month |
| Single Kettlebell Program | $79.99 | one-time |
| Single-kettlebell Circuit | $79.99 | one-time |
| Mobility & Kettlebell Flows | $84.99 | one-time |
| Single Kettlebell Functional | $89.99 | one-time |
| Functional Muscle Building | $99.99 | one-time |
| Kettlebells & Bodyweight | $99.99 | one-time |
| Posterior Chain Strength | $99.99 | one-time |

**What reviewers like**

- 👍 Excellent kettlebell programs
- 👍 Inspiring and motivating workouts
- 👍 Great for building strength and muscle
- 👍 High-quality content
- 👍 Easy to follow lessons

**What reviewers complain about**

- 💰 Price is ridiculous
- 👎 No explanation of exercises
- 👎 No option to adjust repetitions
- 👎 Beginner course not beginner-friendly
- 👎 Some videos don't pop up

**Reported bugs**

- 🐛 Program week missing days
- 🐛 Some videos don't pop up
- 🐛 Videos not edited to show exact flow
- 🐛 In-app videos don't work for some plans

**Requested features**

- 💡 Ability to favorite exercises
- 💡 Input kettlebell weight and track progression
- 💡 Recommended beginner weights/tiers
- 💡 Recommended RPE per set
- 💡 Coaching cues for exercises


### Unbreakable by Dr. John Rusin

[App page](https://appshunter.io/ios/app/unbreakable-by-dr-john-rusin/id6744409487)

Train smarter and feel better with a system designed to build strength, improve mobility, and increase conditioning without pain. Access expert coaching, track progress, and connect with a supportive community. Includes an extensive exercise library and flexible scheduling for any fitness environment.

**Highlights:** Pain-Free Performance Training system, Track progress and view upcoming workouts, Expert coaching on demand, Community discussion boards and spaces, Exercise library with 2000+ tutorials, Flexible training schedules, Nutrition and recovery support

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

**In-app purchases:** none


## Frequently asked questions

### Is Kettlebell Functional Training free?

Kettlebell Functional Training is free to download, with in-app purchases available.

### Is Unbreakable by Dr. John Rusin free?

Unbreakable by Dr. John Rusin is free to download, with no in-app purchases.

### Which has better reviews, Kettlebell Functional Training or Unbreakable by Dr. John Rusin?

Kettlebell Functional Training is rated higher. Kettlebell Functional Training averages 4.8 out of 5 from 280 ratings, while Unbreakable by Dr. John Rusin averages 3.2 from 13 ratings.

### Do Kettlebell Functional Training or Unbreakable by Dr. John Rusin have ads?

Neither Kettlebell Functional Training nor Unbreakable by Dr. John Rusin shows ads.

### Which is updated more often, Kettlebell Functional Training or Unbreakable by Dr. John Rusin?

Kettlebell Functional Training ships an update every 2 months, and Unbreakable by Dr. John Rusin every 5 months. Most recently, Kettlebell Functional Training was updated on November 3, 2026 and Unbreakable by Dr. John Rusin on November 5, 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.*