# PDF Password vs Strange Clocks

The clearest difference is in-app purchases: PDF Password at none against Strange Clocks's 1. PDF Password also leads on iOS requirement (15.0 vs 17.0). Strange Clocks's advantage is ads (none vs shown) and update cadence (every 3 days vs every 3 weeks). On price and device support there is nothing between them.

Both are free to download. Strange Clocks sells 1 one-off in-app purchase. PDF Password asks for nothing beyond the download.

PDF Password ships an update every 3 weeks, Strange Clocks every 3 days. The most recent releases landed on November 11, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | PDF Password | Strange Clocks |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/pdf-password-unlock-and-lock/id6773886649/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 3 weeks | **Every 3 days** |
| Monetization | Ad-supported | — |
| Size | 14 MB | 9 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Bokeria](https://appshunter.io/developer/1425332310) | [KIP Networks](https://appshunter.io/developer/1886007012) |

## What reviewers say

### PDF Password

[App page](https://appshunter.io/ios/app/pdf-password-unlock-and-lock/id6773886649)

Secure your PDF documents by adding or removing password protection directly on your device. This app allows you to encrypt files with AES-256 protection or remove existing passwords when the current one is known. All processing happens locally for enhanced privacy.

**Highlights:** Add AES-256 password protection, Remove known PDF passwords, Process multiple files, On-device processing, Cancel processing option, Preview unlocked files

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

**In-app purchases:** none


### Strange Clocks

[App page](https://appshunter.io/ios/app/strange-clocks/id6814674635)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock all 15 clocks | $1.99 | one-time |


## Frequently asked questions

### Is PDF Password free?

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

### Is Strange Clocks free?

Strange Clocks is free to download, with in-app purchases available.

### Do PDF Password or Strange Clocks have ads?

PDF Password shows ads; Strange Clocks does not.

### Which is updated more often, PDF Password or Strange Clocks?

PDF Password ships an update every 3 weeks, and Strange Clocks every 3 days. Most recently, PDF Password was updated on November 11, 2026 and Strange Clocks on October 31, 2026.

---

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