# Unlock PDF vs SmartDecrypt PDF ZIP

The clearest difference is update cadence: SmartDecrypt PDF ZIP at every 4 weeks against Unlock PDF's every 2 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Unlock PDF sells 4 in-app purchases, starting at $0.99 per 7 days and SmartDecrypt PDF ZIP sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Unlock PDF ships an update every 2 months, SmartDecrypt PDF ZIP every 4 weeks. The most recent releases landed on July 5, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | Unlock PDF | SmartDecrypt PDF ZIP |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/unlock-pdf-password-remover/id1661533684/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 4 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 33 MB | 8 MB |
| Requires iOS | 16.0 | 16.0 |
| Devices | iPhone, iPad, Mac | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Ashvin Ajadiya](https://appshunter.io/developer/1442111420) | [KIEN WEI CHOO](https://appshunter.io/developer/1872314467) |

## What reviewers say

### Unlock PDF

[App page](https://appshunter.io/ios/app/unlock-pdf-password-remover/id1661533684)

Easily access password-protected documents with this secure tool. It instantly unlocks encrypted PDFs, removes restrictions, and allows quick export and sharing of your files. Works offline for enhanced privacy and features a user-friendly interface with dark mode support.

**Highlights:** Unlock password-protected PDFs, Remove PDF restrictions, Export and share unlocked files, Offline functionality, User-friendly interface, Dark Mode support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited Access - Weekly | $0.99 | per 7 days |
| Unlimited Access - Monthly | $2.99 | per month |
| Unlimited Access - Yearly | $14.99 | per year |
| Unlimited - Unlock PDF | $49.99 | one-time |


### SmartDecrypt PDF ZIP

[App page](https://appshunter.io/ios/app/smartdecrypt-pdf-zip/id6763979229)

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 7-Days Trial | Free | one-time |
| SmartDecrypt Premium | $9.99 | one-time |


## Frequently asked questions

### Is Unlock PDF free?

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

### Is SmartDecrypt PDF ZIP free?

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

### Do Unlock PDF or SmartDecrypt PDF ZIP have ads?

Neither Unlock PDF nor SmartDecrypt PDF ZIP shows ads.

### Which is updated more often, Unlock PDF or SmartDecrypt PDF ZIP?

Unlock PDF ships an update every 2 months, and SmartDecrypt PDF ZIP every 4 weeks. Most recently, Unlock PDF was updated on July 5, 2026 and SmartDecrypt PDF ZIP 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.*