Comparison

Compress PDF vs PDF Under

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

Head to head
About

Compress PDF

This app allows you to reduce the file size of PDF documents while maintaining text selectability and searchability. It offers various editing tools like merging, splitting, and reordering pages, all processed on your device for enhanced privacy. A subscription is needed to save or share your work.

Highlights
  • Reduce PDF file size
  • Preserve text and layout
  • On-device processing
  • Merge and split PDFs
  • Reorder and remove pages
  • Password protect PDFs
  • Convert images to PDF
Features
Read full description

Compress PDFs and reduce PDF document size while keeping text selectable and searchable. Perfect for email attachments, messaging, uploads, and storage - with everything processed on your device for maximum privacy. Reduce PDF Size Choose a compression level to shrink PDF file size with minimal quality loss. Unlike "print to image" solutions, your text stays text - searchable, selectable, and copyable. How it works • Open Compress PDF and import a PDF from Files. • Compress PDF. • Save to Files or share to any app. Core features • PDF compression that preserves text and layout • Fast on-device processing - works offline, no uploads • Smart algorithm to reduce size while preserving clarity PDF editor tools (all on device) • Merge PDFs into one file • Split PDF by page ranges • Reorder pages • Remove pages you don't need • Crop pages to the right framing • Rotate pages for correct orientation • Add page numbers for clean documents • Protect PDF with a password • Unlock PDFs (when you know the password) • Convert images to PDF (Photos to PDF) • Convert PDF to images (PDF to PNG/JPG) Made for everyday tasks • Compress large PDFs for fast sharing • Clean up and organize paperwork • Combine multiple documents into one PDF • Remove sensitive pages before sending Subscription required to save or share results To save or share compressed/edited files, a subscription is required: - Weekly (3-day free trial) - Lifetime Terms of use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula Privacy Policy: https://img2pdf.org/privacy-policy/

About

PDF Under

Features
Read full description

Your PDF is ready. Then the upload form says: file too large. Maybe it needs to be under 10 MB. Or 2 MB. Or even 500 KB. You don't want to learn compression settings, and you definitely don't want to keep guessing—compress, check the size, try again, compress again. You just need the PDF to fit. That's what PDF Under is built for. Tell it the MB or KB you need, and it works toward exactly that number. But making a PDF smaller is only half the problem. It still has to look like your PDF. Some compression methods shrink a file by turning every page into a picture—smaller, yes, but the text is no longer selectable, and the document never quite looks right again. PDF Under does it differently. Whenever possible, it keeps your text and vector content untouched, and compresses only the embedded images that were taking up the space in the first place. Smaller file. Same document. You choose the number. 500 KB, 1 MB, 2 MB, 5 MB, 10 MB, or a custom target of your own—no "low, medium, high" guessing games, just the size you were actually asked for. And before you save or share anything, you see the result first: the final size, the finished pages, exactly what you're about to send. Where does this happen? On your phone. Not on a server somewhere. Your PDF is never uploaded, which matters more than usual when the document you're shrinking is the one you'd rather not hand to a random compression website in the first place. No account. No sign-in. Just your file, compressed, still yours. Now, the honest part. Not every target is reachable. A fifty-page scanned document doesn't become 500 KB without something giving—that's just how file size and image quality work, and PDF Under won't pretend otherwise. When your target is more aggressive than the document can survive, it tells you plainly, shows you the smallest version that's still readable, and lets you decide from there. No silent damage. No surprises when you open the file later. This is the app for the moment a portal, a form, an inbox, or a government website hands you a number and expects you to hit it—job applications, school submissions, legal filings, an email that keeps bouncing back because the attachment is too big. Select the PDF, set the target, compress, check the result, send it. Five steps, and you're done. PDF Under is free to try—your first three compressions cost nothing. After that, a Weekly, Yearly, or Lifetime plan unlocks unlimited use, so you're never stuck mid-deadline wondering if today's the day you run out. Subscriptions renew automatically unless canceled at least 24 hours before the current period ends, and you can manage or cancel anytime in your Apple Account settings. Full pricing is shown in the app before you're asked to pay anything. Because when a website tells you your PDF is too large, you shouldn't have to become a compression expert just to send a document. You should just be able to get it under the limit. By downloading, you agree to the Standard Apple End User License Agreement: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Compress PDF4 screens
PDF Under4 screens

Verdict

The call

Compress PDF and PDF Under are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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 2 in-app purchases, starting at $3.99 per 7 days and PDF Under sells 3 in-app purchases, starting at $1.99 per 7 days. Whichever you choose, the download price is not the number that matters.

ScorecardNo meaningful differences
Compress PDF versus PDF Under: the parameters behind the verdict, then further details
ParameterCompress PDFPDF Under
PriceFreeFree
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequency—Every 3 weeks
AdsNoNo
In-app purchasesYesYes
MonetizationSubscription—
DevicesiPhone, iPad — betteriPhone
Requires iOS1817.6 — better
Further details — not scored
Size14 MB3 MB
Age rating+44+
DeveloperArtiom YakoventsevEmre KABOGLU

In-app purchases

2 purchases

Compress PDF

Subscriptions1
  • Weekly Premium3 Days trial$3.997 Days
One-time1
  • Lifetime Premium$19.99
3 purchases

PDF Under

Subscriptions2
  • PDF Under Weekly$1.997 Days
  • PDF Under Yearly$13.991 Year
One-time1
  • PDF Under Lifetime$19.99

Questions

Is Compress PDF free?
Compress PDF is free to download, with in-app purchases available.
Is PDF Under free?
PDF Under is free to download, with in-app purchases available.
Do Compress PDF or PDF Under have ads?
Neither Compress PDF nor PDF Under shows ads.

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