# GKL+ React — Innovate to Dominate

> Lacrosse faceoff reaction time training and performance tracking tool. (iPhone/iPad app by GKL PLUS, LLC.)

- Source: https://appshunter.io/ios/app/gkl-plus-react/id1504647384 (this page in markdown: same URL + `.md`)
- Developer: [GKL PLUS, LLC](https://appshunter.io/developer/1718294128)
- Category: Sports, Health & Fitness
- Price: Free with in-app purchases
- Rating: 3.61/5 from 23 App Store ratings · 11 written reviews indexed
- Age rating: 4+
- Requires: iOS 14.1 · 295 MB
- Languages: English
- Released: 2022-06-20
- Data updated: 2026-06-10
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/gkl-plus-react/id1504647384/reviews.md

## What is GKL+ React?

GKL+ React™ is the first ever lacrosse faceoff tool that captures reaction time.

Improving your reaction time is one of the best investments you can make as a faceoff athlete in your lacrosse career.  

There’s no better way to improve reaction time than by working with professional faceoff coaches and programs that will solidify your technique. 

The demand for reaction time training is extremely high amongst all levels of lacrosse, and up to this point, there has not been a tool that not only measures reaction time but also tracks your progression to ensure the faceoff training is effective.

GKL+ React™ has been designed to utilize the faceoff athlete’s cell phone as a tool to capture their reaction time during training sessions whether they are focusing on clamping, raking, or countering opponents.

GKL+ React™  is packed with innovative features, including:

•	Adjustable settings (timing of faceoff commands and number of reps)
•	Variable timing between “set” and “whistle”
•	Front and back camera capable
•	Hands-free audio-driven sessions
•	Captures time down to the millisecond
•	Reporting and tracking dashboard (1-day and rolling 7-day, 4-week, 1-year)
•	No additional equipment is required
•	Multi-function use (reaction time for clamping, raking, countering, etc.)
•	Machine-learning 
•	Monthly or Annual subscriptions ($9.99 per month or $99.99 per year)

Are you ready to join faceoff specialists around the nation who want to dominate the X?
 
Learn more about GKL+ React™ and other products at GreenKnucklesLacrosse.com.


(a) A link to the Terms and Use in your app:
  (a)https://greenknuckleslacross.com/terms-and-conditions


(b) A link to the Privacy Policy in your app:
  (b) https://greenknuckleslacross.com/privacy-policy

## Key features

- Measures reaction time to the millisecond
- Adjustable training settings
- Tracks progression over time
- Front and back camera support
- Hands-free audio-driven sessions
- Machine-learning capabilities
- Reporting and tracking dashboard

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Monthly | $9.99 | per month |
| Annually | $99.99 | per year |


## Recent user reviews (10 of 11)

All indexed reviews: https://appshunter.io/ios/app/gkl-plus-react/id1504647384/reviews.md

### 5/5 — Very Good app but a few bugs

*2025-05-30*

I installed this app, but there were a few problems with signing in and buying the subscription. However, once I was able to solve those problems and use the app, the app was very very good and I had a very good time using it and I will continue to use it. The customer service is also very good. Overall, this was a very good app and is very good for helping improve your skills at face offs.

### 1/5 — Not good

*2025-01-11*

It takes forever to pay the subscription

### 5/5 — Fantastic App

*2024-07-22*

Great tool for faceoff guys. It holds my son accountable for getting his reps in and makes sure he’s staying on top of his training. Looking forward to seeing more stuff from GKL.

### 1/5 — App not working

*2024-07-20*

I started the trial for gkl plus but it says i dont have it and wont let me use the app

**Developer response:** Hello, we are sorry this happened to you. The problem you are having is a very simple fix and we would love to help. If you can shoot us an email at help@gklplus.com or send us a direct message on Instagram @gklplus we can fix this problem immediately!

### 5/5 — Big Step Forward

*2024-07-02*

Amazing training tool for face off players. I’ve always had to have another person with me to train for face offs and now I can do it on my own, with recorded feedback! This is something that’s been needed for the lacrosse world

### 2/5 — App keeps crashing

*2024-01-03*

This is a great idea for the solo faceoff guys but it keeps crashing every time I try to use it

**Developer response:** Hello, Jake. We are sorry to hear that our app was crashing while in use. We reached out to you directly via Instagram a few months ago and are still are waiting for a response. We would love to help fix this issue, if you could respond to our Instagram message or shoot us an email at help@gklplus.com it would be greatly appreciated!

### 5/5 — This is Great!

*2023-12-13*

GKL is BACKKK with the best app ever! Motivates me so much to get better

### 5/5 — Perfect Reaction Training

*2023-12-13*

Great app couldn’t be happier. Very easy setup and even easier to use. Simple and affordable. Does not disappoint!

### 1/5 — Price

*2023-12-12*

As a face off guy we already are spending to much money on heads and shafts. With the price being so high and recurring there’s no point of buying the subscription. 
I would rather just use faceoff whistles on YouTube. To make this app 100% better is to make it free or make a set price for buying the app mybe like 5-10 bucks and people would love it. Although I have not used the app yet from what I have seen on advertisements it will be amazing but I think I’m speaking for many other face off guys nobody wants to pay a subscription.

### 5/5 — Awesome app!

*2023-12-12*

App is really easy to use, great for all FO athletes.

## Frequently asked questions about GKL+ React

### What is GKL+ React?

GKL+ React is a specialized mobile application designed to help lacrosse athletes improve their faceoff performance by measuring and tracking reaction time during training sessions. It utilizes your phone's camera and sensors to capture precise timing data.

### How does GKL+ React measure reaction time?

GKL+ React captures reaction time down to the millisecond by analyzing your movements in response to audio cues during faceoff drills. It can utilize both the front and back cameras of your device.

### What are the subscription options for GKL+ React?

GKL+ React offers both monthly and annual subscription plans. The monthly subscription costs $9.99 per month, and the annual subscription is $99.99 per year. Both plans include a 3-day free trial.

### Does GKL+ React require any extra equipment?

No, GKL+ React is designed to be used with your existing smartphone or iPod, meaning no additional equipment is required for training. This makes it a convenient tool for athletes to use anywhere.

### What kind of progress tracking does GKL+ React offer?

The app provides a reporting and tracking dashboard that shows your performance over different periods, including 1-day, rolling 7-day, 4-week, and 1-year data. This helps you monitor your improvement and identify areas for further training.

### Is GKL+ React suitable for all lacrosse faceoff techniques?

Yes, GKL+ React is designed for multi-function use and can be applied to various faceoff techniques, including clamping, raking, and countering opponents. The adjustable settings allow you to tailor the training to your specific needs.

### What is the age rating for GKL+ React?

GKL+ React has an age rating of 4+, making it suitable for young athletes and players of all ages interested in improving their lacrosse faceoff skills.

### How often is GKL+ React updated?

The latest version of GKL+ React is 4.1, and it was last updated on May 20, 2025. This indicates a commitment to ongoing development and improvements for the application.

## Version history (last 5 releases)

### 4.1 — 2025-05-20

Minor bugs and performance improvement.

### 4.0 — 2025-02-21

Minor bugs and performance improvement.

### 3.13 — 2024-04-17

Minor bugs and performance improovement

### 3.12 — 2024-04-08

* Added the new sound i.e EARLY which works for reaction time less than 0.170 seconds.
* Replace the old sounds for SET and DOWN with the new one.
* Other minor bug fixes and performance improovement.

### 3.11 — 2024-03-20

Added app privacy manifest.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-10.*