# QMD4 Stroke Trainer/Analyzer vs NSL Mobile

The clearest difference is update cadence: NSL Mobile at every 9 days against QMD4 Stroke Trainer/Analyzer's every 2 months. QMD4 Stroke Trainer/Analyzer's advantage is iOS requirement (12.0 vs 15.1). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

QMD4 Stroke Trainer/Analyzer ships an update every 2 months, NSL Mobile every 9 days. The most recent releases landed on October 14, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | QMD4 Stroke Trainer/Analyzer | NSL Mobile |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (1 ratings)](https://appshunter.io/ios/app/qmd4-stroke-traineranalyzer/id6737728075/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 9 days** |
| Monetization | Free | — |
| Size | 10 MB | 58 MB |
| Requires iOS | **12.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Mosens LLC](https://appshunter.io/developer/1282490669) | [SPR147 Inc.](https://appshunter.io/developer/6807415182) |

## What reviewers say

### QMD4 Stroke Trainer/Analyzer

[App page](https://appshunter.io/ios/app/qmd4-stroke-traineranalyzer/id6737728075)

This app analyzes your billiards stroke using a Bluetooth-enabled device attached to your cue. It provides detailed 3D stroke information, playback, velocity charts, and instant audible alerts to help you identify and fix flaws.

**Highlights:** Bluetooth cue attachment, 3D stroke data transmission, Automatic shot recording/playback, Stroke velocity chart, Cue tip view, Audible 'as you stroke' alerts, Comprehensive practice metrics

**Features:** macOS Compatibility

**In-app purchases:** none


### NSL Mobile

[App page](https://appshunter.io/ios/app/nsl-mobile/id6764607758)

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

**In-app purchases:** none


## Frequently asked questions

### Is QMD4 Stroke Trainer/Analyzer free?

QMD4 Stroke Trainer/Analyzer is free to download, with no in-app purchases.

### Is NSL Mobile free?

NSL Mobile is free to download, with no in-app purchases.

### Do QMD4 Stroke Trainer/Analyzer or NSL Mobile have ads?

Neither QMD4 Stroke Trainer/Analyzer nor NSL Mobile shows ads.

### Which is updated more often, QMD4 Stroke Trainer/Analyzer or NSL Mobile?

QMD4 Stroke Trainer/Analyzer ships an update every 2 months, and NSL Mobile every 9 days. Most recently, QMD4 Stroke Trainer/Analyzer was updated on October 14, 2026 and NSL Mobile 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.*