# pliability vs The Stack System

pliability and The Stack System both sit at 4.8 stars, but that hides the real split: 87% of The Stack System's written reviews are positive against 41% of pliability's. The Stack System also leads on ads (none vs shown) and chart position (#185 vs unranked). pliability's advantage is update cadence (every 5 days vs monthly) and device support (3 vs 1). On price, rating, ratings volume and in-app purchases there is nothing between them.

Both are free to download. pliability sells 2 in-app purchases, starting at $19.99 per month and The Stack System sells 6 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 — 4.8 for pliability against 4.9 for The Stack System. Both are backed by a comparable volume of ratings — 10K and 7K respectively. Written reviews are what separate them: 41% of pliability's written reviews are positive against 87% of The Stack System's.

pliability ships an update every 5 days, The Stack System monthly. The most recent releases landed on September 26, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | pliability | The Stack System |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (10K ratings)](https://appshunter.io/ios/app/pliability-stretch-and-mobility/id1175346453/reviews) | **[4.9 (7K ratings)](https://appshunter.io/ios/app/the-stack-system/id1534757407/reviews)** |
| Number of ratings | **10K** | 7K |
| Positive reviews | 41.0% of reviews | **87.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 5 days** | Monthly |
| Monetization | Free with in-app purchases | Freemium |
| Best chart rank | — | **#185** |
| Size | 264 MB | 213 MB |
| Requires iOS | 16.6 | **16.2** |
| Devices | **iPhone, iPad, Apple TV** | iPhone |
| Age rating | 12+ | 4+ |
| Developer | [pliability, LLC](https://appshunter.io/developer/1175346452) | [The Stack System, LP](https://appshunter.io/developer/1534757409) |

## What reviewers say

### pliability

[App page](https://appshunter.io/ios/app/pliability-stretch-and-mobility/id1175346453)

Enhance flexibility, mobility, and recovery with guided stretching routines. This app offers personalized programs, progress tracking, and integrates with fitness devices to help users move better and prevent injuries.

**Highlights:** 1,700+ guided stretching routines, Customized mobility training programs, Instant start, no equipment required, Mobility Test for personalized assessment, Short, effective workouts (12-20 mins), Offline video downloads, Integrates with WHOOP, Garmin, Apple Health

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Athlete Monthly Subscription | $19.99 | per month |
| Athlete Annual Subscription | $179.99 | per year |

**What reviewers like**

- 🌟 Life-changing for mobility and recovery
- 👍 Consistent daily routines
- 🧘‍♀️ Meditative and calming experience
- 🏋️‍♀️ Effective for athletes and active individuals
- 🔍 Detailed mobility assessment

**What reviewers complain about**

- 🐛 Buggy app with frequent crashes and glitches
- 💰 Expensive subscription
- 🔇 Intrusive and repetitive voiceover
- 🤔 Lack of customization options
- 📚 Repetitive and limited exercise selection

**Reported bugs**

- Inability to cancel subscription easily
- Recurring charges even after cancellation
- Mobility assessment not accurately detecting issues
- Syncing issues between app and website
- Airplay and Chromecast functionality not working reliably

**Requested features**

- Ability to mute or adjust volume of voiceover and music separately
- More personalized and adaptive mobility programs based on assessment
- Integration with Apple Health and other fitness tracking platforms
- Improved navigation and search functionality
- Offline mode for routines


### The Stack System

[App page](https://appshunter.io/ios/app/the-stack-system/id1534757407)

**Currently charting:** #185 Top Grossing · Health & Fitness (US App Store)

Enhance your golf game with science-based training modules for speed, wedging, and putting. Improve distance, accuracy, and consistency with personalized practice sessions and detailed analytics. Requires compatible hardware.

**Highlights:** Variable inertia speed training for distance, Science-based wedge distance control, Gamified putting practice and analytics, Personalized practice sessions, Real-time scoring and insights, Customizable training modes

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Stack Putting 1 Week | $9.99 | per 7 days |
| Stack Putting 1 Wk | $9.99 | per 7 days |
| TheStack Speed Training | $14.99 | per 7 days |
| TheStack Scoring Membership | $99.00 | per year |
| TheStack Speed Membership | $99.00 | per year |
| TheStack Premium Membership | $129.00 | per year |

**What reviewers like**

- 🚀 Seeing speed gains
- 👍 Easy to use app
- 👍 Motivating and helpful
- 👍 Detailed instructions
- 👍 Warmup routine

**What reviewers complain about**

- 🐛 Glitchy app (audio, dictation, timers)
- 🔧 Integration issues with other devices
- 💡 More insights and advice needed
- 🐛 Inconsistent audio/voice features
- 🐛 Occasional missing countdown

**Reported bugs**

- Putting app not working properly
- Slope percentage input issue

**Requested features**

- Calendar integration
- Music/podcast playback integration
- Apple Watch support


## Frequently asked questions

### Is pliability free?

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

### Is The Stack System free?

The Stack System is free to download, with in-app purchases available.

### Which has better reviews, pliability or The Stack System?

The Stack System is rated higher. pliability averages 4.8 out of 5 from 10K ratings, while The Stack System averages 4.9 from 7K ratings.

### Do pliability or The Stack System have ads?

pliability shows ads; The Stack System does not.

### Which is updated more often, pliability or The Stack System?

pliability ships an update every 5 days, and The Stack System monthly. Most recently, pliability was updated on September 26, 2026 and The Stack System 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.*