# The Stack System vs CaliGolf Instruction App

The clearest difference is in-app purchases: CaliGolf Instruction App at none against The Stack System's 8. The Stack System's advantage is chart position (#146 vs unranked). On price, update cadence, ads and device support 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. CaliGolf Instruction App asks for nothing beyond the download.

The Stack System ships an update monthly, CaliGolf Instruction App every 5 weeks. The most recent releases landed on October 3, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | The Stack System | CaliGolf Instruction App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (7K ratings)](https://appshunter.io/ios/app/the-stack-system/id1534757407/reviews)** | — |
| Number of ratings | **7K** | — |
| Positive reviews | 86.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Monthly** | Every 5 weeks |
| Monetization | Freemium | — |
| Best chart rank | **#146** | — |
| Size | 221 MB | 190 MB |
| Requires iOS | 16.2 | **16.0** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [The Stack System, LP](https://appshunter.io/developer/1534757409) | [Hole Nine Enterprises, Inc.](https://appshunter.io/developer/1773003170) |

## What reviewers say

### The Stack System

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

**Currently charting:** #146 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


### CaliGolf Instruction App

[App page](https://appshunter.io/ios/app/caligolf-instruction-app/id6736672024)

**Features:** macOS Compatibility, Apple Wallet, 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 CaliGolf Instruction App free?

CaliGolf Instruction App is free to download, with no in-app purchases.

### Do The Stack System or CaliGolf Instruction App have ads?

Neither The Stack System nor CaliGolf Instruction App shows ads.

### Which is updated more often, The Stack System or CaliGolf Instruction App?

The Stack System ships an update monthly, and CaliGolf Instruction App every 5 weeks. Most recently, The Stack System was updated on October 3, 2026 and CaliGolf Instruction App on September 24, 2026.

---

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