# PDF Field Guide vs Priority4

The clearest difference is in-app purchases: Priority4 at none against PDF Field Guide's 2. Priority4 also leads on update cadence (every 8 days vs monthly) and iOS requirement (13.0 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. PDF Field Guide sells 2 one-off in-app purchases. Priority4 asks for nothing beyond the download.

PDF Field Guide ships an update monthly, Priority4 every 8 days. The most recent releases landed on September 12, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | PDF Field Guide | Priority4 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/pdf-field-guide/id6475620684/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Monthly | **Every 8 days** |
| Monetization | Free | — |
| Size | 1 MB | 69 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Heidi Paul](https://appshunter.io/developer/1724530685) | [Marco Reyes](https://appshunter.io/developer/1708404834) |

## What reviewers say

### PDF Field Guide

[App page](https://appshunter.io/ios/app/pdf-field-guide/id6475620684)

Quickly access, search, and share your essential PDF documents. Organize and import files for offline viewing, and convert images into searchable PDFs. Smart zoom and full-screen reading enhance your experience.

**Highlights:** Organize and group documents, Import PDFs for offline viewing, Create searchable PDFs from images, Smart zoom and full-screen reading, Keyword search and table of contents, Share documents via multiple methods

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Pass | $1.99 | one-time |
| Pro Pass | $4.99 | one-time |


### Priority4

[App page](https://appshunter.io/ios/app/priority4/id6503363594)

**In-app purchases:** none


## Frequently asked questions

### Is PDF Field Guide free?

PDF Field Guide is free to download, with in-app purchases available.

### Is Priority4 free?

Priority4 is free to download, with no in-app purchases.

### Do PDF Field Guide or Priority4 have ads?

Neither PDF Field Guide nor Priority4 shows ads.

### Which is updated more often, PDF Field Guide or Priority4?

PDF Field Guide ships an update monthly, and Priority4 every 8 days. Most recently, PDF Field Guide was updated on September 12, 2026 and Priority4 on September 9, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*