# The Stack System vs Sunday Swing

The clearest difference is in-app purchases: Sunday Swing at none against The Stack System's 8. Sunday Swing also leads on device support (3 vs 1) and iOS requirement (14.0 vs 16.2). The Stack System's advantage is ads (none vs shown) and chart position (#157 vs unranked). On price and update cadence 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. Sunday Swing asks for nothing beyond the download.

The Stack System ships an update monthly, Sunday Swing every 3 weeks. The most recent releases landed on September 24, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | The Stack System | Sunday Swing |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (7K ratings)](https://appshunter.io/ios/app/the-stack-system/id1534757407/reviews)** | — |
| Number of ratings | **7K** | — |
| Positive reviews | 87.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Monthly | **Every 3 weeks** |
| Monetization | Freemium | — |
| Best chart rank | **#157** | — |
| Size | 213 MB | 117 MB |
| Requires iOS | 16.2 | **14.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [The Stack System, LP](https://appshunter.io/developer/1534757409) | [Sunday Swing, LLC](https://appshunter.io/developer/1728513744) |

## What reviewers say

### The Stack System

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

**Currently charting:** #157 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


### Sunday Swing

[App page](https://appshunter.io/ios/app/sunday-swing/id6476991080)

**Features:** macOS Compatibility, Apple Wallet

**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 Sunday Swing free?

Sunday Swing is free to download, with no in-app purchases.

### Do The Stack System or Sunday Swing have ads?

Sunday Swing shows ads; The Stack System does not.

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

The Stack System ships an update monthly, and Sunday Swing every 3 weeks. Most recently, The Stack System was updated on September 24, 2026 and Sunday Swing on September 13, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*