# KERN vs Alphiox Hub

The clearest difference is in-app purchases: KERN at none against Alphiox Hub's 8. KERN also leads on iOS requirement (12.0 vs 16.0). Alphiox Hub's advantage is update cadence (every 2 days vs every 3 months). On price, ads and device support there is nothing between them.

Both are free to download. Alphiox Hub sells 8 in-app purchases, starting at $0.99 per month. KERN asks for nothing beyond the download.

KERN ships an update every 3 months, Alphiox Hub every 2 days. The most recent releases landed on October 10, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | KERN | Alphiox Hub |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 days** |
| Size | 40 MB | 23 MB |
| Requires iOS | **12.0** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Harald Schubert (Leipzig)](https://appshunter.io/developer/1233278952) | [Md Nasir Uddin Bhuiyan](https://appshunter.io/developer/1885674174) |

## What reviewers say

### KERN

[App page](https://appshunter.io/ios/app/kern-learnapp/id1670401538)

**Features:** macOS Compatibility

**In-app purchases:** none


### Alphiox Hub

[App page](https://appshunter.io/ios/app/alphiox-hub-spelling-control/id6760741405)

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

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Plus | $0.99 | per month |
| Master | $3.99 | per month |
| Ultimate | $6.99 | per month |
| Plus | $9.99 | per year |
| Teacher | $17.99 | per month |
| Master | $34.99 | per year |
| Ultimate | $49.99 | per year |
| Teacher | $129.99 | per year |


## Frequently asked questions

### Is KERN free?

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

### Is Alphiox Hub free?

Alphiox Hub is free to download, with in-app purchases available.

### Do KERN or Alphiox Hub have ads?

Neither KERN nor Alphiox Hub shows ads.

### Which is updated more often, KERN or Alphiox Hub?

KERN ships an update every 3 months, and Alphiox Hub every 2 days. Most recently, KERN was updated on October 10, 2026 and Alphiox Hub on October 5, 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.*