Comparison

PDF Compressor vs PDF Slim

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

Head to head
About

PDF Compressor

Easily reduce the file size of PDFs and images without sacrificing quality. This utility helps you shrink large documents for sharing, uploading, or saving storage space on your device.

Highlights
  • Compress PDF files
  • Compress images
  • Custom compression levels
  • Fast PDF processing
  • Saved files manager
  • Download & share files
Features
Read full description

PDF Compressor – Compress PDF & Reduce File Size PDF Compressor is a fast, reliable, and easy-to-use app that helps you compress PDF files and images, reduce file size, and save storage on your device. If you need a simple way to shrink large PDFs for sharing, uploading, or archiving, this app is built for you. With advanced compression technology, PDF Compressor allows you to reduce PDF size without losing quality. You can also compress images to make them easier to upload, email, or store. Whether you are working with business documents, study material, invoices, or scanned files, this app helps you manage everything efficiently. Key Features: • Compress PDF Files – Reduce PDF file size quickly and securely • Image Compressor – Compress images without noticeable quality loss • Custom Compression Levels – Low, Medium, and Custom options • Fast PDF Processing – Optimized for speed and performance • Saved Files Manager – Access and manage compressed PDFs easily • Download & Share Files – Save compressed files instantly • Simple & Modern Interface – Designed for iPhone and iPad users Perfect for: - PDF compression for email and cloud upload - Reducing file size for online forms and portals - Saving storage on your iPhone or iPad - Students, professionals, and business users PDF Compressor is a subscription-based app. Premium features such as unlimited PDF compression, advanced compression controls, and enhanced file management require an active subscription. Privacy Policy: https://health-fitness-pro.fit/privacy Terms of Use: https://health-fitness-pro.fit/terms

About

PDF Slim

Reduce the size of your PDF files with adjustable quality settings. Save or share compressed documents directly from the application. Access detailed information about each PDF.

Highlights
  • Compress PDF files
  • Adjustable quality levels
  • Save compressed PDFs
  • Share instantly
  • View PDF details
Features
Read full description

A smart compression app that quickly and easily reduces PDF file size! • Every Feature, No Payment Use every feature right away — no payment required. • Your Choice of Compression Quality Choose from three quality levels — Low, Medium, and High — to control how much your PDFs are compressed. The lower the quality, the smaller the file. • Detailed PDF Information Check key details at a glance, including file name, page count, file size, and creation date. • Separate Save & Instant Sharing Your original PDF stays untouched — the compressed copy is saved separately and can be shared instantly from the app.

Screenshots

PDF Compressor4 screens
PDF Slim3 screens

Verdict

The call

The clearest difference is update cadence: PDF Slim at weekly against PDF Compressor's every 3 weeks. PDF Slim also leads on monetization model (ad-supported vs free with in-app purchases) and iOS requirement (15.0 vs 17.0). PDF Compressor's advantage is ratings volume (3 vs 1). On price, rating, ads and in-app purchases 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. PDF Compressor sells 3 in-app purchases, starting at $1.99 per 7 days and PDF Slim sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for PDF Compressor against 5.0 for PDF Slim. Both are backed by a comparable volume of ratings — 3 and 1 respectively.

UpkeepUpdate frequency

PDF Compressor ships an update every 3 weeks, PDF Slim weekly. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.

Scorecard4 real differences · 5 level
PDF Compressor versus PDF Slim: the parameters behind the verdict, then further details
ParameterPDF CompressorPDF Slim
PriceFreeFree
Rating5.0 (3 ratings)5.0 (1 ratings)
Number of ratings3 — better1
Update frequencyEvery 3 weeksWeekly — better
AdsYesYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesAd-supported — better
DevicesiPhone, iPad, MaciPhone, iPad, iPod
Requires iOS17.015.0 — better
Further details — not scored
Size14 MB14 MB
Age rating4+4+
DeveloperESPRESSO TECH (SMC-PRIVATE) LIMITEDMBG Studio

Customer experience

PDF Compressor

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

PDF Slim

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

3 purchases

PDF Compressor

Subscriptions3
  • Weekly Access$1.997 Days
  • Monthly Access$3.991 Month
  • Yearly Access$29.991 Year
1 purchases

PDF Slim

One-time1
  • Remove Ads$0.99

Questions

Is PDF Compressor free?
PDF Compressor is free to download, with in-app purchases available.
Is PDF Slim free?
PDF Slim is free to download, with in-app purchases available.
Which has better reviews, PDF Compressor or PDF Slim?
PDF Compressor and PDF Slim are both rated 5.0 out of 5 on the App Store, from 3 and 1 ratings respectively.
Do PDF Compressor or PDF Slim have ads?
Both PDF Compressor and PDF Slim show ads.
Which is updated more often, PDF Compressor or PDF Slim?
PDF Compressor ships an update every 3 weeks, and PDF Slim weekly. Most recently, PDF Compressor was updated on November 5, 2026 and PDF Slim on October 31, 2026.

Other comparisons