# Pocket PDF vs Cairn Maps

The clearest difference is ads: Cairn Maps at none against Pocket PDF's shown. Cairn Maps also leads on update cadence (every 6 days vs every 5 weeks). Pocket PDF's advantage is device support (3 vs 1) and iOS requirement (13.0 vs 18.2). On price and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Pocket PDF ships an update every 5 weeks, Cairn Maps every 6 days. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Pocket PDF | Cairn Maps |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/pocket-pdf-pdf-utility/id6450652794/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 5 weeks | **Every 6 days** |
| Monetization | Ad-supported | — |
| Size | 20 MB | 15 MB |
| Requires iOS | **13.0** | 18.2 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Raja Muhammad Arslan Zafar](https://appshunter.io/developer/1551490943) | [YMMV](https://appshunter.io/developer/1224453829) |

## What reviewers say

### Pocket PDF

[App page](https://appshunter.io/ios/app/pocket-pdf-pdf-utility/id6450652794)

This app is a comprehensive PDF utility that allows you to scan documents, merge multiple PDFs, compress files, split large documents, convert images to PDF, and sign PDFs. It aims to enhance productivity and simplify digital document management.

**Highlights:** Scan documents and images, Merge multiple PDF files, Compress PDF file sizes, Split large PDFs, Convert images to PDF, Sign PDF documents

**Features:** macOS Compatibility

**In-app purchases:** none


### Cairn Maps

[App page](https://appshunter.io/ios/app/cairn-maps/id6756520443)

**In-app purchases:** none


## Frequently asked questions

### Is Pocket PDF free?

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

### Is Cairn Maps free?

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

### Do Pocket PDF or Cairn Maps have ads?

Pocket PDF shows ads; Cairn Maps does not.

### Which is updated more often, Pocket PDF or Cairn Maps?

Pocket PDF ships an update every 5 weeks, and Cairn Maps every 6 days. Most recently, Pocket PDF was updated on November 3, 2026 and Cairn Maps on October 30, 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.*