Comparison

Compress PDF vs World Clock

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Compress PDF

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)
Read full description

Compress PDFs and make PDFs smaller easily. Optimize PDFs for storage and sharing. Need to format a document for printing, work, or official submission? Resize PDF pages to A4, Letter, Legal, Tabloid, A3, and Custom Dimensions. Features: • Adjustable Quality: Use a simple slider to balance file size • Target Size: Set a goal size • Live Preview: Compare original vs. compressed file size instantly • Quick Share: Easily save to Files or share via email and messages • Smart Document Scanner: Capture and crop documents cleanly right from your camera • Photos to PDF: Convert your images and photos directly into a clean PDF document • Quick Text Creator: Convert plain text typed on your keyboard directly into flat, print-ready text documents • Advanced Organizer: Merge separate files together or cleanly extract specific pages into a new document • Live Text OCR: Instantly lift editable text directly out of captured images • PDF Markup: Annotate documents by drawing, highlighting, and adding text directly to the page PDFs are flattened during export. Text, links, and bookmarks will no longer be selectable. Free users: • Standard PDF Compression (1 per day) • Standard A4 Resizing (1 per day) • Photos to PDF conversion (1 per day) • Quick Text to PDF documents (1 per day) • PDF Markup & Annotation tools (1 per day) Premium unlocks: • Target File Size mode (specify KB/MB) • Merge separate PDFs together • Extract specific pages into a new file • Live Text OCR Extraction • Custom Page Sizer & All Page Formats • No Daily Limit Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://shotexstudio.com/compress-pdf-resize-pdf/ On-Device Processing: Private and secure—no files ever leave your phone.

About

World Clock

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
Read full description

Every time zone. One glance. One tap to convert. World Clock: Timezone Converter is the fastest way to track time across the globe. Whether you're scheduling meetings with a distributed team, calling family overseas, or planning your next trip - see every city's local time at a glance with beautiful color gradients that shift from day to night. INSTANT TIME CONVERSION Tap any city to open the converter. Slide the time and watch every clock on your screen update simultaneously - colors shift from sunrise to sunset as you scrub through the hours. No other app makes time conversion this visual and intuitive. TIMELINE GRID Switch to the Timeline tab for a powerful hourly grid view. See all your cities side by side with color-coded cells - golden hours highlight overlapping work times so you can find the perfect meeting slot in seconds. PEOPLE & GROUPS Assign contacts to time zones and organize them into groups - Team, Family, Clients. See at a glance who's awake, who's in their workday, and who you shouldn't call right now. Add up to 3 people free. DATE CALCULATOR Need to know the date 90 business days from now? Or how many days between two dates? The built-in calculator handles date math, business day calculations, and duration computations. WIDGETS Analog clocks, digital grids, solar arcs, world maps, timeline views, people status, gradient cards, heat maps - plus Lock Screen and Liquid Glass styles for iOS 26. Your Home Screen, your way. WORKS COMPLETELY OFFLINE All core features - clocks, converter, timeline, sunrise/sunset calculations - work without an internet connection. Your data stays on your device. FREE FEATURES Track up to 4 cities with live time-of-day gradients Full time converter with hour slider Timeline grid with color-coded golden hours Share conversion cards (with watermark) Date calculator with duration and business day math Up to 3 people with timezone tracking Dark mode, 12h/24h formats DST awareness with advance warnings VoiceOver and Dynamic Type support PRO SUBSCRIPTION (unlocks with monthly, annual, or lifetime purchase): Unlimited cities and people Calendar Quick-Add with title, notes, and duration All widget styles including Lock Screen Smart Share to Slack, Teams, and Google Calendar .ics calendar invite export Share cards without watermark Custom themes, app icons, and emoji Weather and moon/solar data at each location Live seconds display Timeline range selection and overlap finder Meeting cost analysis Smart notifications AI Time Assistant Custom work hours per person Terms of Service: https://worldtimezones.app/terms Privacy Policy: https://worldtimezones.app/privacy

Screenshots

Compress PDF3 screens
World Clock4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard1 real difference · 9 level
Compress PDF versus World Clock: the parameters behind the verdict, then further details
ParameterCompress PDFWorld Clock
PriceFreeFree
Rating4.7 (15 ratings)5.0 (7 ratings) — better
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings15 — better7
Update frequencyFortnightly — betterEvery 3 weeks
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFreemium
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.6 — better18.0
Further details — not scored
Size7 MB32 MB
Age rating12+4+
DeveloperPremiumAl LimitedApphaze

Customer experience

Compress PDF

All ratings14 ratings
Positive92.9%
Neutral0.0%
Negative7.1%
Written reviews10 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

World Clock

All ratings7 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

3 purchases

Compress PDF

Subscriptions1
  • Premium Weekly$2.997 Days
One-time2
  • Premium$4.99
  • Premium$5.99
3 purchases

World Clock

Subscriptions2
  • World Clock Pro Monthly$4.991 Month
  • World Clock Pro Yearly$19.991 Year
One-time1
  • World Clock Pro Lifetime Access$29.99

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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