# Tree RX: Stage Reaction Times — Pro Tree And Sportsman Tree

> Drag racing reaction time practice app for Pro and Sportsman series. (iPhone/iPad app by Joshua Hart.)

- Source: https://appshunter.io/ios/app/tree-rx-stage-reaction-times/id1575851139 (this page in markdown: same URL + `.md`)
- Developer: [Joshua Hart](https://appshunter.io/developer/853952165)
- Category: Sports, Entertainment
- Price: $0.99
- Rating: 5.00/5 from 3 App Store ratings · 3 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.0 · 25 MB
- Languages: American English
- Released: 2021-07-10
- Data updated: 2026-08-30
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/tree-rx-stage-reaction-times/id1575851139/reviews.md

## What is Tree RX?

The perfect App for practicing your drag racing reaction times for either Pro or the Sportsman series.

You did it again.  You spent all those hours in your shop, convinced your buddies to help you "make it scream"...and it seems like you've spent hours listening to advice from others, yet today you red lighted.  You've tried it all, from deep staging to stage peeking.  You're itching for a hole shot.  

When you practice something long enough, you become so proficient that it seems almost instinctual, almost like something that you would do naturally.  Your brain recognizes the situation and it's familiarity and your brain neurons react and fire quicker. Pony Up will help you get there.

The first thing that we recommend when opening the app is setting your Gas Pedal Delay within Settings.  This is the delay for how long it takes for your car to start moving after gunning the gas.  This of course could be different if your stage peeking.

Features:
- Custom Engine Haptic Feedback (HIGH, MEDIUM, LOW, OFF)
- Pro Tree Reaction Practice
- Sportsman Tree Reaction Practice
- Complete control over light delays to match your local track.
- Saves your times and keeps track of your Top 5 fastest R/T's.

See ya at the digs!

## Key features

- Pro Tree reaction practice
- Sportsman Tree reaction practice
- Customizable light delays
- Gas Pedal Delay setting
- Saves Top 5 fastest R/T's
- Custom engine haptic feedback

## Chart rankings

- #193 in Top Paid · Sports (US App Store)

## Recent user reviews (3 of 3)

All indexed reviews: https://appshunter.io/ios/app/tree-rx-stage-reaction-times/id1575851139/reviews.md

### 5/5 — Great app, works perfect!!!

*2025-09-29*

Simple & useful app 👍  
Finally an app to replace Practice Tree by Dragtracker, which no longer exists… Thank you for the change after reading review shows good support!!

### 5/5 — I love it

*2024-03-13*

Great app; worth every penny!!

### 1/5 — The App is backwards

*2021-09-19*

When dragracing you press down on the button to engage your trans break and release the trans break to allow the car to launch. This app you have to press the button to get a reaction time. So I was frustrated when I got this and it didn’t help me at all. I ended up with the jags version of this and it works like it should.

**Developer response:** Thanks for the review and thanks for calling us out!  We’ve updated the app implementing fixes to address your concern.  We would love to have you update your review after trying out the latest version.

## Frequently asked questions about Tree RX

### What is Tree RX used for?

Tree RX is designed to help drag racers practice and improve their reaction times for both Pro and Sportsman series. It simulates the starting tree and allows for customization of light delays to match specific tracks.

### How much does Tree RX cost?

Tree RX is a paid application, available for a one-time purchase of $0.99. There are no in-app purchases or subscriptions required.

### Does Tree RX have ads?

No, Tree RX is ad-free. Users can practice their reaction times without any interruptions from advertisements.

### What devices does Tree RX support?

Tree RX is compatible with iPhone and iPod devices. It is designed for iOS users who participate in drag racing.

### Can I track my progress with Tree RX?

Yes, Tree RX saves your reaction times and keeps track of your Top 5 fastest R/T's. This feature helps you monitor your improvement over time.

### How often is Tree RX updated?

The latest version of Tree RX is 2.0, last updated on March 6, 2023. This indicates the app is actively maintained by the developer.

### What is the age rating for Tree RX?

Tree RX has an age rating of 4+, making it suitable for a wide range of users interested in sports simulation and training.

### Can I customize the starting lights in Tree RX?

Yes, Tree RX offers complete control over light delays to match your local track. You can also set your Gas Pedal Delay within the app's settings.

## Version history (last 2 releases)

### 2.0 — 2023-03-06

We have made significant changes after a user named "DaddyV2012" reviewed the app and said it was backwards.  Well, listen here DaddyV2012!  You were right.  Thanks for calling me out on it and we hope you like the new update and like the additional feature of engine haptic feedback.

### 1.0 — 2021-07-10

No release notes.

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## More apps by Joshua Hart

- [Math Junior](https://appshunter.io/ios/app/math-junior/id1491218491)
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- [AdErasr: Ad Blocker](https://appshunter.io/ios/app/aderasr-ad-blocker/id6759590579)

All apps by Joshua Hart: https://appshunter.io/developer/853952165

## Related topics

[drag racing reaction time](https://appshunter.io/ios/topics/drag-racing-reaction-time)

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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 2026-08-30.*