# The Stack System vs Under Par Performance Golf

The clearest difference is rating: The Stack System at 4.9 against Under Par Performance Golf's 4.2. The Stack System also leads on ratings volume (7K vs 5) and chart position (#100 vs unranked). Under Par Performance Golf's advantage is in-app purchases (none vs 8) and device support (3 vs 1). On price, update cadence and ads there is nothing between them.

Both are free to download. The Stack System sells 6 in-app purchases, starting at $9.99 per 7 days. Under Par Performance Golf asks for nothing beyond the download.

The Stack System holds the better App Store score, 4.9 against 4.2. That said, the two scores are not equally well evidenced: The Stack System has 7K ratings behind it against 5, so its average is the more settled of the two.

The Stack System ships an update monthly, Under Par Performance Golf every 3 weeks. The most recent releases landed on October 15, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | The Stack System | Under Par Performance Golf |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (7K ratings)](https://appshunter.io/ios/app/the-stack-system/id1534757407/reviews)** | [4.2 (5 ratings)](https://appshunter.io/ios/app/under-par-performance-golf/id1671714766/reviews) |
| Number of ratings | **7K** | 5 |
| Positive reviews | 86.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Monthly | **Every 3 weeks** |
| Monetization | Freemium | **Free** |
| Best chart rank | **#100** | — |
| Size | 221 MB | 418 MB |
| Requires iOS | 16.2 | **13.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [The Stack System, LP](https://appshunter.io/developer/1534757409) | [Scratch Golf Inc.](https://appshunter.io/developer/1671714768) |

## What reviewers say

### The Stack System

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

**Currently charting:** #100 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


### Under Par Performance Golf

[App page](https://appshunter.io/ios/app/under-par-performance-golf/id1671714766)

Enhance your golf performance with personalized practice, fitness, and coaching. Achieve your goals with structured plans, on-demand expert advice, and progress tracking. Guaranteed handicap improvement or your next six months are free.

**Highlights:** Personalized practice plans, Structured fitness programs, On-demand coaching, Handicap improvement guarantee, Progress tracking, Drills with video explanations, Health app integration

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

**In-app purchases:** none


## Frequently asked questions

### Is The Stack System free?

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

### Is Under Par Performance Golf free?

Under Par Performance Golf is free to download, with no in-app purchases.

### Which has better reviews, The Stack System or Under Par Performance Golf?

The Stack System is rated higher. The Stack System averages 4.9 out of 5 from 7K ratings, while Under Par Performance Golf averages 4.2 from 5 ratings.

### Do The Stack System or Under Par Performance Golf have ads?

Neither The Stack System nor Under Par Performance Golf shows ads.

### Which is updated more often, The Stack System or Under Par Performance Golf?

The Stack System ships an update monthly, and Under Par Performance Golf every 3 weeks. Most recently, The Stack System was updated on October 15, 2026 and Under Par Performance Golf on September 30, 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.*