# Compress PDF vs World Clock

The clearest difference is rating: World Clock at 5.0 against Compress PDF's 4.7. On price, review sentiment, ratings volume and update cadence there is nothing between them.

Both are free to download. Compress PDF sells 3 in-app purchases, starting at $2.99 per 7 days and World Clock sells 3 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

World Clock holds the better App Store score, 5.0 against 4.7. Both are backed by a comparable volume of ratings — 15 and 7 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

Compress PDF ships an update fortnightly, World Clock every 3 weeks. The most recent releases landed on October 24, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Compress PDF | World Clock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (15 ratings)](https://appshunter.io/ios/app/compress-pdf-resize-pdf/id6753917813/reviews) | **[5.0 (7 ratings)](https://appshunter.io/ios/app/world-clocktimezone-converter/id6759943378/reviews)** |
| Number of ratings | **15** | 7 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 3 weeks |
| Monetization | Free with in-app purchases | Freemium |
| Size | 7 MB | 32 MB |
| Requires iOS | **17.6** | 18.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 12+ | 4+ |
| Developer | [PremiumAl Limited](https://appshunter.io/developer/1865407557) | [Apphaze](https://appshunter.io/developer/1856021247) |

## What reviewers say

### Compress PDF

[App page](https://appshunter.io/ios/app/compress-pdf-resize-pdf/id6753917813)

Easily reduce the size of PDF files for efficient storage and sharing. Offers adjustable quality levels and on-device processing for privacy. An optional Pro upgrade provides unlimited compressions, target file size control, and an ad-free experience.

**Highlights:** Compress PDFs by adjustable quality, Reduce PDF file size quickly, Preview original vs. compressed size, Share or save compressed PDFs, Private and secure on-device processing, Target file size control (Pro), Unlimited compressions (Pro)

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Weekly | $2.99 | per 7 days |
| Premium | $4.99 | one-time |
| Premium | $5.99 | one-time |


### World Clock

[App page](https://appshunter.io/ios/app/world-clocktimezone-converter/id6759943378)

Easily track time across multiple cities with visual gradients and an intuitive converter. Organize contacts by time zone, calculate dates, and utilize customizable widgets. Works offline for core functionality.

**Highlights:** Instant time conversion with visual slider, Hourly timeline grid with overlapping work times, Organize contacts into groups by time zone, Date and duration calculator, Customizable widgets for home screen, Offline functionality for core features

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| World Clock Pro Monthly | $4.99 | per month |
| World Clock Pro Yearly | $19.99 | per year |
| World Clock Pro Lifetime Access | $29.99 | one-time |


## Frequently asked questions

### Is Compress PDF free?

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

### Is World Clock free?

World Clock is free to download, with in-app purchases available.

### Which has better reviews, Compress PDF or World Clock?

World Clock is rated higher. Compress PDF averages 4.7 out of 5 from 15 ratings, while World Clock averages 5.0 from 7 ratings.

### Do Compress PDF or World Clock have ads?

Neither Compress PDF nor World Clock shows ads.

### Which is updated more often, Compress PDF or World Clock?

Compress PDF ships an update fortnightly, and World Clock every 3 weeks. Most recently, Compress PDF was updated on October 24, 2026 and World Clock on October 16, 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.*