# FLY PDF vs PDF Lock

The clearest difference is iOS requirement: PDF Lock at 14.0 against FLY PDF's 17.0. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. FLY PDF sells 3 in-app purchases, starting at $5.99 per month and PDF Lock sells 3 in-app purchases, starting at $0.99 per 7 days. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | FLY PDF | PDF Lock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/fly-pdf-pdf-reader-and-viewer/id6741893203/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Daily | — |
| Monetization | Free with in-app purchases | — |
| Size | 13 MB | 13 MB |
| Requires iOS | 17.0 | **14.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Tran Thi Viet](https://appshunter.io/developer/1781505229) | [Bhavnaben Rupareliya](https://appshunter.io/developer/1831970601) |

## What reviewers say

### FLY PDF

[App page](https://appshunter.io/ios/app/fly-pdf-pdf-reader-and-viewer/id6741893203)

This app offers a comprehensive suite of tools for viewing, annotating, and managing PDF documents on mobile devices. It features customizable reading themes, secure passcode protection for sensitive files, and easy sharing options. Designed for efficiency and convenience, it streamlines PDF handling for professionals, students, and everyday users.

**Highlights:** Comprehensive PDF viewing, Annotate and highlight PDFs, Customizable reading themes, Secure passcode protection, Efficient PDF sharing, Fast PDF import

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PDF Premium Monthly | $5.99 | per month |
| PDF Premium Yearly | $39.99 | per year |
| PDF Premium Lifetime | $59.99 | one-time |


### PDF Lock

[App page](https://appshunter.io/ios/app/pdf-lock-password-protect/id6752465221)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PDF Protect   1 Week | $0.99 | per 7 days |
| Protect PDF   1 Month | $2.99 | per month |
| Protect PDF   1 Year | $14.99 | per year |


## Frequently asked questions

### Is FLY PDF free?

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

### Is PDF Lock free?

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

### Do FLY PDF or PDF Lock have ads?

Neither FLY PDF nor PDF Lock 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.*