# Alp Systems vs Scan To PDF Pro

The clearest difference is in-app purchases: Alp Systems at none against Scan To PDF Pro's 2. Alp Systems also leads on iOS requirement (12.4 vs 16.0). Scan To PDF Pro's advantage is update cadence (weekly vs every 3 months). On price, ads and device support there is nothing between them.

Both are free to download. Scan To PDF Pro sells 2 in-app purchases, starting at $6.99 per month. Alp Systems asks for nothing beyond the download.

Alp Systems ships an update every 3 months, Scan To PDF Pro weekly. The most recent releases landed on October 27, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Alp Systems | Scan To PDF Pro |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Weekly** |
| Size | 9 MB | 1 MB |
| Requires iOS | **12.4** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Brian Birtle](https://appshunter.io/developer/991721885) | [Marshaun Smith](https://appshunter.io/developer/1883336817) |

## What reviewers say

### Alp Systems

[App page](https://appshunter.io/ios/app/alp-systems/id1577824266)

**Features:** macOS Compatibility

**In-app purchases:** none


### Scan To PDF Pro

[App page](https://appshunter.io/ios/app/scan-to-pdf-pro-document-scan/id6760221934)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Plan | $6.99 | per month |
| Yearly Plan | $39.99 | per year |


## Frequently asked questions

### Is Alp Systems free?

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

### Is Scan To PDF Pro free?

Scan To PDF Pro is free to download, with in-app purchases available.

### Do Alp Systems or Scan To PDF Pro have ads?

Neither Alp Systems nor Scan To PDF Pro shows ads.

### Which is updated more often, Alp Systems or Scan To PDF Pro?

Alp Systems ships an update every 3 months, and Scan To PDF Pro weekly. Most recently, Alp Systems was updated on October 27, 2026 and Scan To PDF Pro on October 25, 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.*