Comparison

PDF Compressor vs Write on PDF

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

Head to head
About

PDF Compressor

Reduce the size of your PDF documents with this easy-to-use tool. Select your file, choose the desired output quality, and compress your PDFs with a single tap. Save disk space and speed up uploads and downloads.

Highlights
  • Compress PDF files
  • Reduce PDF file size
  • Select output PDF quality
  • Easy-to-use interface
  • Single-tap compression
Features
Read full description

If you want to reduce your PDF file size, save your disk space back and faster on uploads and downloads, ... then let PDF Compressor - Compress PDF File app help you. You can easily compress your PDF files right on your device, with just one tap to select your file Select quality of output PDF to reduce file size PDF. PDF Compressor is a tool to compress PDF documents to reduce PDF file size. Compress PDF files allows you to select heavy PDF files to reduce their size. PDF compressor will simply reduce pdf file size with a single tap. PDF Compressor is free and the best tool to reduce PDF file size. Do download this compressor app and tell us more about how we can improve it. Compressing PDF file size makes it possible for anyone to reduce your PDF document size, especially useful for those PDF files with many scan graphics and photos. Compressed PDF documents require less disk space for storage and faster uploads and downloads save transmission time and cost. This app gives you access to compression options to help you to reduce PDF file size without compromising the document's integrity. Compress PDF File rewrites the entire PDF documents using selected compression options as efficiently as possible. Some PDF documents might not get compressed, because the PDF documents might be already compressed or have nothing much to compress. With our simple and easy-to-use app, you can compress/reduce pdf file sizes using your IOS device. Compress PDF file size has the following features: - Very smart and easy-to-use PDF compressor. - Compress PDF files to reduce PDF file size.

About

Write on PDF

Effortlessly edit, fill, and sign PDF documents. Import PDFs or images, add text, signatures, and stamps, then print or share instantly. Manage your documents offline with a fast and intuitive interface.

Highlights
  • Import PDFs and images
  • Type, edit, and highlight text
  • Add signatures and stamps
  • Fill forms easily
  • Print and share documents
  • Offline document management
  • Create from blank pages or templates
Features
Read full description

Write on PDF makes document work effortless. Import any PDF or image, fill forms, add signatures, stamps, and watermarks, and print or share instantly. Create blank pages or templates, type and edit text with ease, and keep annotations organized by page. Offline friendly and built for speed, it’s the fastest way to edit, sign, and deliver polished PDFs. Key features: Import PDFs and images, or start from a blank page Type, edit, highlight, draw, and add stamps or watermarks Save reusable signatures; sign and send in seconds Fill forms neatly with guided text entry Print, export, or share without losing quality Manage documents offline with quick autosave Clean, touch-friendly interface for phones and tablets Terms of use: https://docs.google.com/document/d/1LFwlAZRxW27rsNmElr90fdF-Cq7TpmxZXllAyo5JX-8/edit?usp=sharing Privacy Policy: https://www.termsfeed.com/live/b737db52-72f1-4c0c-a4de-9b312f9f33d7

Screenshots

PDF Compressor3 screens
Write on PDF4 screens

Verdict

The call

The clearest difference is in-app purchases: PDF Compressor at none against Write on PDF's 2. PDF Compressor also leads on ratings volume (866 vs 8). Write on PDF's advantage is ads (none vs shown). On price, rating, update cadence and device support 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. Write on PDF sells 2 in-app purchases, starting at $4.99 per 7 days. PDF Compressor asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.6 for PDF Compressor against 4.5 for Write on PDF. That said, the two scores are not equally well evidenced: PDF Compressor has 866 ratings behind it against 8, so its average is the more settled of the two.

UpkeepUpdate frequency

PDF Compressor ships an update every 2 months, Write on PDF every 3 months. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

Scorecard4 real differences · 6 level
PDF Compressor versus Write on PDF: the parameters behind the verdict, then further details
ParameterPDF CompressorWrite on PDF
PriceFreeFree
Rating4.6 (866 ratings) — better4.5 (8 ratings)
Positive reviews26.0% of reviews—
Number of ratings866 — better8
Update frequencyEvery 2 months — betterEvery 3 months
AdsYesNo — better
In-app purchasesNo — betterYes
MonetizationAd-supported — betterFree with in-app purchases
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS15.0 — better15.1
Further details — not scored
Size11 MB47 MB
Age rating4+4+
DeveloperVishalbhai VaghasiyaAndrii Kulchytskyi

Customer experience

PDF Compressor

All ratings813 ratings
Positive90.5%
Neutral2.5%
Negative7.0%
Written reviews50 reviews
Positive26.0%
Neutral0.0%
Negative74.0%

Write on PDF

All ratings8 ratings
Positive87.5%
Neutral0.0%
Negative12.5%

Bugs and requests

PDF Compressor

Reported bugs

9 issues
  • App crashes on second compression attempt
  • File size increases instead of decreasing
  • App exits unexpectedly after compression
  • Compressed file unrecognizable or corrupted
  • Keyboard numbers display as blank
Show 4 more
  • Slow compression times (5+ minutes for small files)
  • Unable to save or retrieve compressed files
  • Document pages expand instead of compress
  • App crashes on launch

Requested features

5 requests
  • Reduce or eliminate advertisements
  • Add compression quality/control settings
  • Batch file compression capability
  • Improved preview functionality for multiple documents
  • Better file naming conventions for compressed files

Write on PDF

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

PDF Compressor

No in-app purchases

2 purchases

Write on PDF

Subscriptions2
  • Print to PDF Weekly 3 days free3 Days trial$4.997 Days
  • Print to PDF Yearly$19.991 Year

Questions

Is PDF Compressor free?
PDF Compressor is free to download, with no in-app purchases.
Is Write on PDF free?
Write on PDF is free to download, with in-app purchases available.
Which has better reviews, PDF Compressor or Write on PDF?
PDF Compressor is rated higher. PDF Compressor averages 4.6 out of 5 from 866 ratings, while Write on PDF averages 4.5 from 8 ratings.
Do PDF Compressor or Write on PDF have ads?
PDF Compressor shows ads; Write on PDF does not.
Which is updated more often, PDF Compressor or Write on PDF?
PDF Compressor ships an update every 2 months, and Write on PDF every 3 months. Most recently, PDF Compressor was updated on November 3, 2026 and Write on PDF on October 30, 2026.

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