# Pen Capture vs SD Primer

The clearest difference is in-app purchases: Pen Capture at none against SD Primer's 2. SD Primer's advantage is update cadence (every 5 days vs every 4 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. SD Primer sells 2 in-app purchases, starting at $9.99 per month. Pen Capture asks for nothing beyond the download.

Pen Capture ships an update every 4 months, SD Primer every 5 days. The most recent releases landed on September 18, 2026 and August 4, 2026 respectively.

## The numbers

| Metric | Pen Capture | SD Primer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 5 days** |
| Size | 22 MB | 20 MB |
| Requires iOS | 18.5 | **17.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Christian Dane Casey](https://appshunter.io/developer/1864692379) | [Ernesto Hilvano](https://appshunter.io/developer/1740292069) |

## What reviewers say

### Pen Capture

[App page](https://appshunter.io/ios/app/pen-capture/id6757118665)

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is Pen Capture free?

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

### Is SD Primer free?

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

### Do Pen Capture or SD Primer have ads?

Neither Pen Capture nor SD Primer shows ads.

### Which is updated more often, Pen Capture or SD Primer?

Pen Capture ships an update every 4 months, and SD Primer every 5 days. Most recently, Pen Capture was updated on September 18, 2026 and SD Primer on August 4, 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.*