Comparison

SlimSpace vs PDF Compressor-Compress PDF

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

Head to head
About

SlimSpace

Free up device storage by reducing the size of photos and videos. This app offers offline compression with advanced algorithms to maintain quality. It supports various file formats and includes tools for cleaning up your photo library.

Highlights
  • Offline compression
  • No watermark or time limits
  • Advanced quality preservation
  • Supports major file formats
  • Customizable compression settings
  • Batch compression
  • Album and screenshot cleaner
Features
Read full description

Running out of storage space? Videos too large to send? Photos too big to share on WeChat or social media? Video & Photo Compressor is here to help! This app is your all-in-one solution for reducing file sizes without sacrificing quality. Whether it's videos, images, or other large files, you can compress them in just a few taps and save valuable storage on your device. 【Key Features】 • No watermark, no time limits • Offline compression — all processing happens locally on your phone. No internet needed, keeping your data secure • Advanced compression algorithms that preserve original quality while minimizing file size • Supports all major formats — MP4, MOV, AVI, MKV, 3GP, FLV, MPG, JPEG, PNG, and more • Customizable settings — choose compression priority: smaller size or better resolution • Preview results before saving • One-tap delete original files to save space instantly • Batch compression — process multiple files at once with ease 【More Space-Saving Tools】 • Album cleaner • Similar photo cleaner • Screenshot manager • Video splitter • File archiving and compression ========================== Compressor Pro Unlimited Subscription ========================== - Join Compressor Pro members, free to use all features, including all video & audio formats, ocr function, in addition, ads will be automatically removed. - Compressor Pro Unlimited subscription is billed monthly or annually at the rate correspnding to the selected plan. In addition, a one-time payment will be offered if needed, which is not one of the subscription plan. - Payment will be charged to Itunes Account at confirmation of purchase. - Subscriptions automatically renews unless auto-renew is turned off at least 24 hours before the end of the current period. - Account will be charged for renewal within 24-hours prior to the end of the current period, and identify the cost of the renewal. - Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase. - Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable. - Terms of use : https://www.jianshu.com/p/7b3c05310c93 - Privacy policy: https://www.jianshu.com/p/4a71bed09de0

About

PDF Compressor-Compress PDF

Easily reduce the size of your PDF files without sacrificing quality. This tool helps you shrink PDFs for faster sharing, emailing, or uploading, saving valuable storage space. It's perfect for managing large documents and scanned files efficiently.

Highlights
  • Compress PDF files without losing clarity
  • Smart compressor for scanned or large documents
  • Reduce PDF size for easy upload and sharing
  • Free compressor with high quality output
  • Preserve text and image quality
  • Choose compression level
Features
Read full description

Compress PDF files easily with our free PDF compressor tool. This app is designed to help you compress PDF, reduce file size, and save valuable storage space without losing quality. Whether you're working with large files or scanned documents, this smart PDF compressor lets you shrink PDFs for faster sharing, emailing, or uploading. Need to compress PDF files or reduce PDF size for email or storage? Just select your file, choose a compression level, and reduce size instantly, while keeping your document clean and readable. Key Features: Compress PDF files without losing clarity. Smart PDF compressor for scanned or large documents. Compress PDF reduce PDF size for easy upload and sharing. Free PDF compressor with high quality output. Preserve text and image quality while reducing MBs. Save space and manage your files more efficiently. Choose compression level to suit your needs. Intuitive design and user-friendly experience. Perfect for students, professionals or anyone handling large PDFs this app simplifies your workflow and helps you get more done. Whether you're sending documents by email, uploading them to the cloud, or freeing up device space, our free PDF compressor is the reliable solution you need. Download now and compress PDF files quickly with a tool that keeps your files small, safe, and sharp. Terms and conditions: https://www.itspdf.com/termsandconditions Privacy policy: https://www.itspdf.com/policy Disclaimer: Your privacy is fully protected. The PDF Compressor app only processes files you select and never accesses, uploads or stores any hidden data. All compression happens securely to keep your documents safe. If you have any questions, please contact us: eclix.suport@gmail.com.

Screenshots

SlimSpace4 screens
PDF Compressor-Compress PDF4 screens

Verdict

The call

SlimSpace and PDF Compressor-Compress PDF both sit at 4.6 stars, but that hides the real split: 67% of SlimSpace's written reviews are positive against 29% of PDF Compressor-Compress PDF's. SlimSpace also leads on update cadence (every 2 weeks vs every 2 months) and ratings volume (998 vs 146). 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. SlimSpace sells 4 in-app purchases, starting at $0.69 per 7 days and PDF Compressor-Compress PDF sells 4 in-app purchases, starting at $5.99 per 7 days. 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 — 4.6 for SlimSpace against 4.6 for PDF Compressor-Compress PDF. That said, the two scores are not equally well evidenced: SlimSpace has 998 ratings behind it against 146, so its average is the more settled of the two. Written reviews are what separate them: 67% of SlimSpace's written reviews are positive against 29% of PDF Compressor-Compress PDF's.

UpkeepUpdate frequency

SlimSpace ships an update every 2 weeks, PDF Compressor-Compress PDF every 2 months. The most recent releases landed on October 13, 2026 and October 14, 2026 respectively.

Scorecard3 real differences · 7 level
SlimSpace versus PDF Compressor-Compress PDF: the parameters behind the verdict, then further details
ParameterSlimSpacePDF Compressor-Compress PDF
PriceFreeFree
Rating4.6 (998 ratings)4.6 (146 ratings)
Positive reviews67.3% of reviews — better28.6% of reviews
Number of ratings998 — better146
Update frequencyEvery 2 weeks — betterEvery 2 months
AdsYesYes
In-app purchasesYesYes
MonetizationFreemiumFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod, Mac — better
Requires iOS15.615.0 — better
Further details — not scored
Size41 MB30 MB
Age rating4+4+
DeveloperHappyTimes Tech Co., Ltd.EclixTech UK LTD

Customer experience

SlimSpace

All ratings998 ratings
Positive90.5%
Neutral2.3%
Negative7.2%
Written reviews394 reviews
Positive67.3%
Neutral5.3%
Negative27.4%

PDF Compressor-Compress PDF

All ratings146 ratings
Positive91.1%
Neutral1.4%
Negative7.5%
Written reviews7 reviews
Positive28.6%
Neutral0.0%
Negative71.4%

Bugs and requests

SlimSpace

Reported bugs

5 issues
  • Videos not resizing properly
  • Compressed photos not saving to album
  • Paid features not working as expected
  • App crashing on launch or during compression
  • Excessive data usage

Requested features

5 requests
  • Batch compression option
  • More compression quality settings
  • Ability to preview compressed files
  • Support for more file types
  • Improved error handling and feedback

PDF Compressor-Compress PDF

Not enough reviews yet to summarise bugs or requests.

In-app purchases

4 purchases

SlimSpace

Subscriptions3
  • Upgrade(1 Week)$0.697 Days
  • Upgrade(1 Month)$3.491 Month
  • Compressor Vip(1 Year)3 Days trial$6.491 Year
One-time1
  • Upgrade(Forever)$18.99
4 purchases

PDF Compressor-Compress PDF

Subscriptions4
  • Weekly Subscription$5.997 Days
  • Monthly Subscription$9.991 Month
  • Yearly Subscription$19.991 Year
Show 1 more
  • Yearly Subscription$39.991 Year

Questions

Is SlimSpace free?
SlimSpace is free to download, with in-app purchases available.
Is PDF Compressor-Compress PDF free?
PDF Compressor-Compress PDF is free to download, with in-app purchases available.
Which has better reviews, SlimSpace or PDF Compressor-Compress PDF?
SlimSpace and PDF Compressor-Compress PDF are both rated 4.6 out of 5 on the App Store, from 998 and 146 ratings respectively.
Do SlimSpace or PDF Compressor-Compress PDF have ads?
Both SlimSpace and PDF Compressor-Compress PDF show ads.
Which is updated more often, SlimSpace or PDF Compressor-Compress PDF?
SlimSpace ships an update every 2 weeks, and PDF Compressor-Compress PDF every 2 months. Most recently, SlimSpace was updated on October 13, 2026 and PDF Compressor-Compress PDF on October 14, 2026.

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