# Starrett System vs Unbreakable by Dr. John Rusin

The clearest difference is review sentiment: Unbreakable by Dr. John Rusin at 60% against Starrett System's 0%. Starrett System's advantage is rating (5.0 vs 3.2) and update cadence (every 3 weeks vs every 5 months). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Starrett System holds the better App Store score, 5.0 against 3.2. Both are backed by a comparable volume of ratings — 6 and 13 respectively. Written reviews complicate that: 0% of Starrett System's written reviews are positive against 60% of Unbreakable by Dr. John Rusin's, so the app with the better star average is not the one people write more warmly about.

Starrett System ships an update every 3 weeks, Unbreakable by Dr. John Rusin every 5 months. The most recent releases landed on October 30, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Starrett System | Unbreakable by Dr. John Rusin |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (6 ratings)](https://appshunter.io/ios/app/starrett-system/id6740607477/reviews)** | [3.2 (13 ratings)](https://appshunter.io/ios/app/unbreakable-by-dr-john-rusin/id6744409487/reviews) |
| Number of ratings | 6 | **13** |
| Positive reviews | 0.0% of reviews | **60.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 5 months |
| Monetization | Free | Free |
| Size | 427 MB | 41 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [The Ready State Inc.](https://appshunter.io/developer/1311499696) | [John Rusin](https://appshunter.io/developer/1807540567) |

## What reviewers say

### Starrett System

[App page](https://appshunter.io/ios/app/starrett-system/id6740607477)

This comprehensive 90-day fitness, movement, and nutrition program helps you build a functional, durable, and resilient body for life. It includes expert-led training, mobility and recovery sessions, nutrition guidance, and habit tracking tools.

**Highlights:** 90-day progressive strength and interval training, Mobility and recovery sessions, Macro-based nutrition guidance, Habit tracking and goal setting, Resource vault with pain protocols and recipes, Syncs with Health app

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

**In-app purchases:** none


### 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 Starrett System free?

Starrett System is free to download, with no in-app purchases.

### 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, Starrett System or Unbreakable by Dr. John Rusin?

Starrett System is rated higher. Starrett System averages 5.0 out of 5 from 6 ratings, while Unbreakable by Dr. John Rusin averages 3.2 from 13 ratings.

### Do Starrett System or Unbreakable by Dr. John Rusin have ads?

Neither Starrett System nor Unbreakable by Dr. John Rusin shows ads.

### Which is updated more often, Starrett System or Unbreakable by Dr. John Rusin?

Starrett System ships an update every 3 weeks, and Unbreakable by Dr. John Rusin every 5 months. Most recently, Starrett System was updated on October 30, 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.*