# ReactionX vs AX.GRIND

ReactionX and AX.GRIND are too close to call on the numbers: across 8 compared parameters — price, rating, ratings volume and ads among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

On the App Store both sit at effectively the same score — 5.0 for ReactionX against 4.9 for AX.GRIND. Both are backed by a comparable volume of ratings — 3 and 8 respectively.

## The numbers

| Metric | ReactionX | AX.GRIND |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/reactionx/id1515855584/reviews)** | [4.9 (8 ratings)](https://appshunter.io/ios/app/axgrind/id6810449401/reviews) |
| Number of ratings | 3 | **8** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 weeks | — |
| Monetization | Free | Free |
| Size | 34 MB | 7 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [学斌 赵](https://appshunter.io/developer/1514555505) | [LU SONG](https://appshunter.io/developer/6810449403) |

## What reviewers say

### ReactionX

[App page](https://appshunter.io/ios/app/reactionx/id1515855584)

Enhance your athletic performance with this app, designed to be used with specialized training lamps. Improve your speed and reaction times through professional sports training exercises.

**Highlights:** Professional sports training, Speed improvement, Reaction time enhancement, Compatible with training lamps hardware

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

**In-app purchases:** none


### AX.GRIND

[App page](https://appshunter.io/ios/app/axgrind/id6810449401)

This app offers comprehensive fitness and nutrition guidance with over 300 workouts and 1,200 exercises. It includes an AI coach, nutrition calculator, progress tracking, and a supportive community, all without subscriptions or paywalls.

**Highlights:** 300+ workouts, 1,200+ exercises with video tutorials, AI Coach and Body Analyzer, Calorie and macro calculator, Progress photo and measurement tracking, Community forum and direct messaging, Focus timer with XP system

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

**In-app purchases:** none


## Frequently asked questions

### Is ReactionX free?

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

### Is AX.GRIND free?

AX.GRIND is free to download, with no in-app purchases.

### Which has better reviews, ReactionX or AX.GRIND?

ReactionX is rated higher. ReactionX averages 5.0 out of 5 from 3 ratings, while AX.GRIND averages 4.9 from 8 ratings.

### Do ReactionX or AX.GRIND have ads?

Neither ReactionX nor AX.GRIND shows ads.

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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.*