# Lock Mobile vs PDFIX

The clearest difference is update cadence: PDFIX at fortnightly against Lock Mobile's every 5 months. PDFIX also leads on iOS requirement (13.0 vs 15.1). On price, ads, in-app purchases and device support there is nothing between them.

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

Lock Mobile ships an update every 5 months, PDFIX fortnightly. The most recent releases landed on September 8, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | Lock Mobile | PDFIX |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Fortnightly** |
| Size | 30 MB | 67 MB |
| Requires iOS | 15.1 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Domoscio](https://appshunter.io/developer/1333152344) | [Mauritz Jarl Software House LLC](https://appshunter.io/developer/1474194996) |

## What reviewers say

### Lock Mobile

[App page](https://appshunter.io/ios/app/lock-mobile/id1531741485)

**Features:** macOS Compatibility

**In-app purchases:** none


### PDFIX

[App page](https://appshunter.io/ios/app/pdfix/id6741908625)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Lock Mobile free?

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

### Is PDFIX free?

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

### Do Lock Mobile or PDFIX have ads?

Neither Lock Mobile nor PDFIX shows ads.

### Which is updated more often, Lock Mobile or PDFIX?

Lock Mobile ships an update every 5 months, and PDFIX fortnightly. Most recently, Lock Mobile was updated on September 8, 2026 and PDFIX on September 14, 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.*