# ReactionX vs Ergo.App

The clearest difference is ratings volume: ReactionX at 3 against Ergo.App's 1. On price, rating, update cadence and ads there is nothing between them.

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 5.0 for Ergo.App. Both are backed by a comparable volume of ratings — 3 and 1 respectively.

ReactionX ships an update every 6 weeks, Ergo.App every 2 months. The most recent releases landed on October 30, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | ReactionX | Ergo.App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (3 ratings)](https://appshunter.io/ios/app/reactionx/id1515855584/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/ergoapp/id6756553330/reviews) |
| Number of ratings | **3** | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 2 months |
| Monetization | Free | Free |
| Size | 34 MB | 24 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [学斌 赵](https://appshunter.io/developer/1514555505) | [Swara Ramesh](https://appshunter.io/developer/1861369500) |

## 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


### Ergo.App

[App page](https://appshunter.io/ios/app/ergoapp/id6756553330)

Visualize ergonomic postures in real-time. This app helps analyze body positioning without needing prior data or storing any information.

**Highlights:** Real-time posture visualization, Ergonomic considerations, No prior data required, No data storage, Health & Fitness analysis

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ReactionX free?

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

### Is Ergo.App free?

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

### Which has better reviews, ReactionX or Ergo.App?

ReactionX and Ergo.App are both rated 5.0 out of 5 on the App Store, from 3 and 1 ratings respectively.

### Do ReactionX or Ergo.App have ads?

Neither ReactionX nor Ergo.App shows ads.

### Which is updated more often, ReactionX or Ergo.App?

ReactionX ships an update every 6 weeks, and Ergo.App every 2 months. Most recently, ReactionX was updated on October 30, 2026 and Ergo.App on October 16, 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.*