# RAIO App vs Celion Hub

The clearest difference is rating: Celion Hub at 4.7 against RAIO App's 2.7. Celion Hub also leads on in-app purchases (none vs 2) and update cadence (every 10 days vs every 6 weeks). RAIO App's advantage is ratings volume (43 vs 7). On price, ads and device support there is nothing between them.

Both are free to download. RAIO App sells 2 in-app purchases, starting at $19.99 per month. Celion Hub asks for nothing beyond the download.

Celion Hub holds the better App Store score, 4.7 against 2.7. That said, the two scores are not equally well evidenced: RAIO App has 43 ratings behind it against 7, so its average is the more settled of the two.

RAIO App ships an update every 6 weeks, Celion Hub every 10 days. The most recent releases landed on October 24, 2026 and October 23, 2026 respectively.

## The numbers

| Metric | RAIO App | Celion Hub |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.7 (43 ratings)](https://appshunter.io/ios/app/raio-app/id6446694876/reviews) | **[4.7 (7 ratings)](https://appshunter.io/ios/app/celion-hub/id6737703474/reviews)** |
| Number of ratings | **43** | 7 |
| Positive reviews | 20.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 10 days** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 88 MB | 117 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [Kale Anders](https://appshunter.io/developer/1678765749) | [Miguel Angel Cabanas aguilar](https://appshunter.io/developer/1777485332) |

## What reviewers say

### RAIO App

[App page](https://appshunter.io/ios/app/raio-app/id6446694876)

This app uses spaced repetition technology and real-life sentences to help you learn grammar and vocabulary in context. It aims to improve retention, reduce translation in your head, and help you start thinking in the language you're learning.

**Highlights:** Spaced repetition technology, Sentence-based learning, Learn grammar and vocabulary in context, Reduce translation in your head, Think in the target language, Personalized progress reports, Gamification features

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly - Standard Plan | $19.99 | per month |
| Annual - SAVE 20%! | $179.99 | per year |


### Celion Hub

[App page](https://appshunter.io/ios/app/celion-hub/id6737703474)

Learn and grow on your terms, accessing content from your mobile, desktop, or TV. This app offers the flexibility to engage with educational material whenever and however suits your lifestyle best.

**Highlights:** Cross-device access (mobile, desktop, TV), Flexible learning schedule, Personal growth content, On-the-go learning, Home-based learning

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

**In-app purchases:** none


## Frequently asked questions

### Is RAIO App free?

RAIO App is free to download, with in-app purchases available.

### Is Celion Hub free?

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

### Which has better reviews, RAIO App or Celion Hub?

Celion Hub is rated higher. RAIO App averages 2.7 out of 5 from 43 ratings, while Celion Hub averages 4.7 from 7 ratings.

### Do RAIO App or Celion Hub have ads?

Neither RAIO App nor Celion Hub shows ads.

### Which is updated more often, RAIO App or Celion Hub?

RAIO App ships an update every 6 weeks, and Celion Hub every 10 days. Most recently, RAIO App was updated on October 24, 2026 and Celion Hub on October 23, 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.*