# PDF Lock vs EnGrid

The clearest difference is in-app purchases: EnGrid at none against PDF Lock's 2. EnGrid also leads on iOS requirement (15.0 vs 17.6). PDF Lock's advantage is update cadence (fortnightly vs every 2 months). On price, ads and device support there is nothing between them.

Both are free to download. PDF Lock sells 2 in-app purchases, starting at $0.99 per month. EnGrid asks for nothing beyond the download.

PDF Lock ships an update fortnightly, EnGrid every 2 months. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | PDF Lock | EnGrid |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 2 months |
| Size | 17 MB | 46 MB |
| Requires iOS | 17.6 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Nikunj Gondaliya](https://appshunter.io/developer/6789138441) | [Enset d.o.o.](https://appshunter.io/developer/6798197378) |

## What reviewers say

### PDF Lock

[App page](https://appshunter.io/ios/app/pdf-lock-unlock-and-protect/id6789138439)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly - PDF Lock & Unlock Pro | $0.99 | per month |
| Yearly - PDF Lock & Unlock Pro | $7.99 | per year |


### EnGrid

[App page](https://appshunter.io/ios/app/engrid/id6798197376)

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

**In-app purchases:** none


## Frequently asked questions

### Is PDF Lock free?

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

### Is EnGrid free?

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

### Do PDF Lock or EnGrid have ads?

Neither PDF Lock nor EnGrid shows ads.

### Which is updated more often, PDF Lock or EnGrid?

PDF Lock ships an update fortnightly, and EnGrid every 2 months. Most recently, PDF Lock was updated on November 5, 2026 and EnGrid on October 31, 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.*