Compress PDF vs UnderLimit
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
Read full descriptionHide 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/
UnderLimit
Read full descriptionHide full description
Make your files fit the limit. UnderLimit helps you reduce photos and PDFs to the file size you actually need. Choose your target size, and UnderLimit handles the compression while preserving the best quality possible. PERFECT FOR FILE SIZE LIMITS Need a photo under 1 MB? A PDF under 5 MB? An attachment small enough to upload or send? Set the target size and let UnderLimit do the work. PHOTO COMPRESSION • Compress photos to a target file size • Reduce image size in KB or MB • Keep the best quality possible • Quickly prepare images for uploads, forms, email, and sharing PDF COMPRESSION • Reduce PDF file size • Choose the maximum size you need • Prepare PDFs for upload limits and attachments • Simple, fast workflow SMART RECOMMENDATIONS Not sure which target size to choose? UnderLimit can help you select an appropriate size for your file. PRIVATE BY DESIGN Your files are processed directly on your device. Your photos and PDFs don't need to be uploaded to a remote server for compression. SIMPLE PRICING Start using UnderLimit for free. If you need more, unlock UnderLimit Unlimited with a one-time purchase. No subscription. No ads. No account required. UNDERLIMIT IS USEFUL FOR • Online forms and portals • Email attachments • Applications and document submissions • Websites with maximum upload sizes • Reducing photos before sharing • Compressing PDFs for size-restricted uploads Stop guessing compression levels. Choose the size you need and make your file fit the limit.
Screenshots
Verdict
Compress PDF and UnderLimit 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
Both are free to download. Compress PDF sells 2 in-app purchases, starting at $3.99 per 7 days and UnderLimit sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
| Parameter | Compress PDF | UnderLimit |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | — | Every 2 days |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Subscription | — |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 18 | 17.0 — better |
| Further details — not scored | ||
| Size | 14 MB | 4 MB |
| Age rating | +4 | 4+ |
| Developer | Artiom Yakoventsev | ALESSANDRO VINCENZO DEL BALZO |
In-app purchases
Compress PDF
- Weekly Premium3 Days trial$3.997 Days
- Lifetime Premium$19.99
UnderLimit
- UnderLimit Unlimited$2.99
Questions
Is Compress PDF free?
Is UnderLimit free?
Do Compress PDF or UnderLimit have ads?
Other comparisons















