# Shift Adapt vs Starrett System

Shift Adapt and Starrett System both sit at 5.0 stars, but that hides the real split: 100% of Shift Adapt's written reviews are positive against 0% of Starrett System's. Shift Adapt also leads on iOS requirement (11.0 vs 13.0). Starrett System's advantage is update cadence (monthly vs every 3 months) and ratings volume (6 vs 2). On price, rating, 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.

On the App Store both sit at effectively the same score — 5.0 for Shift Adapt against 5.0 for Starrett System. Both are backed by a comparable volume of ratings — 2 and 6 respectively. Written reviews are what separate them: 100% of Shift Adapt's written reviews are positive against 0% of Starrett System's.

Shift Adapt ships an update every 3 months, Starrett System monthly. The most recent releases landed on September 14, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | Shift Adapt | Starrett System |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/shift-adapt/id6469709048/reviews) | [5.0 (6 ratings)](https://appshunter.io/ios/app/starrett-system/id6740607477/reviews) |
| Number of ratings | 2 | **6** |
| Positive reviews | **100.0% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Monthly** |
| Monetization | Free | Free |
| Size | 80 MB | 419 MB |
| Requires iOS | **11.0** | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Unscared Inc](https://appshunter.io/developer/1436460208) | [The Ready State Inc.](https://appshunter.io/developer/1311499696) |

## What reviewers say

### Shift Adapt

[App page](https://appshunter.io/ios/app/shift-adapt/id6469709048)

Log your workouts and track your performance from anywhere. Access daily breath practices to enhance your training experience. Expand your fitness journey with this comprehensive tool.

**Highlights:** Workout logging, Performance tracking, Daily breath practices, Access training from anywhere, Expand fitness experience

**Features:** macOS Compatibility

**In-app purchases:** none


### 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


## Frequently asked questions

### Is Shift Adapt free?

Shift Adapt is free to download, with no in-app purchases.

### Is Starrett System free?

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

### Which has better reviews, Shift Adapt or Starrett System?

Shift Adapt and Starrett System are both rated 5.0 out of 5 on the App Store, from 2 and 6 ratings respectively.

### Do Shift Adapt or Starrett System have ads?

Neither Shift Adapt nor Starrett System shows ads.

### Which is updated more often, Shift Adapt or Starrett System?

Shift Adapt ships an update every 3 months, and Starrett System monthly. Most recently, Shift Adapt was updated on September 14, 2026 and Starrett System on September 21, 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.*