# SD Primer vs InterHub

The clearest difference is iOS requirement: InterHub at 15.1 against SD Primer's 17.0. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. SD Primer sells 2 in-app purchases, starting at $9.99 per month and InterHub sells 2 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | SD Primer | InterHub |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 5 days | — |
| Size | 20 MB | 42 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Ernesto Hilvano](https://appshunter.io/developer/1740292069) | [FILIP KAROL MLYNARSKI](https://appshunter.io/developer/1821276119) |

## What reviewers say

### SD Primer

[App page](https://appshunter.io/ios/app/sd-primer/id6758010557)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SDPrimer Pro | $9.99 | per month |
| SDPrimer Pro | $99.99 | per year |


### InterHub

[App page](https://appshunter.io/ios/app/interhub-interview-prep/id6760921055)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| InterHub Premium | $9.99 | per month |
| InterHub Premium | $99.99 | per year |


## Frequently asked questions

### Is SD Primer free?

SD Primer is free to download, with in-app purchases available.

### Is InterHub free?

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

### Do SD Primer or InterHub have ads?

Neither SD Primer nor InterHub 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.*