Comparison

PDF Compressor vs Udfyld

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

Head to head
About

PDF Compressor

Features
Read full description

PDF Compressor helps you reduce PDF file size for sharing, uploading, and keeping smaller copies of your documents. Select a PDF, choose a compression level, and check the result before saving or sharing it. Choose your compression level Pick Better Quality, Balanced, or Smaller File to prioritize visual quality or a smaller output. The amount of reduction depends on the original document. Check the result Preview your compressed PDF and see its file size, page count, and percentage reduction. Your original PDF stays unchanged, so you can review the compressed copy before using it. Save, share, and find it again Save the result to Files or send it through the share sheet. Saved results remain available in History for previewing, sharing, renaming, or deleting later. Process your PDFs locally Compression runs locally without uploading your documents to a processing server. No app account is required. Choose the access that fits your needs Free access includes advertising and two successful compressions per day. Cancelled or failed attempts and results without a meaningful size reduction do not use your allowance. Previewing, saving, and sharing an existing result remain available without using another compression. Optional Pro access removes advertising and the daily compression limit. The same compression quality options are available with free and Pro access. Before you compress Compression converts each page into an image within the output PDF. Visual quality may decrease, and text in the compressed copy will no longer be selectable or searchable. Some PDFs may not become smaller, and a specific output size is not guaranteed. PDF Compressor lets you use the app at no cost. However, premium access may be available as an optional in-app upgrade. Privacy Policy: https://alderpathstudio.github.io/PDF-Compressor/privacy-policy.html Terms of Use: https://alderpathstudio.github.io/PDF-Compressor/term-of-use.html

About

Udfyld

Features
Read full description

The school form, the lease, the insurance claim. You just need to fill it in, sign it and send it back. Udfyld does that in a minute. Free. No ads. Your files never leave your phone. FILL IN FORMS • Real form fields are filled directly: text, check boxes, radio buttons and lists. • Flat PDFs without fields: tap where you want to write. The text sits neatly on the line. • Add a date, a tick or a cross with one tap. SIGN • Draw your signature and initials once with your finger. • Place them and resize them where you need to sign. • Your signature is only stored on your iPhone. PAGES • Move, rotate, duplicate, delete and extract pages. • Merge several PDFs into one file. • Turn photos into a PDF. COMPRESS • Make big PDFs small enough to email: Small, Medium or Original. • See the new size before you save, e.g. 12.4 MB → 1.8 MB. • Pages with text are never turned into images, so text stays sharp. SAVE AND SHARE • The original is never touched: Udfyld saves a copy unless you choose to overwrite. • Share with Mail, Messages, AirDrop or save to Files. • Lock the fields so the recipient sees exactly the same, and add a password if you like. • Open straight from Files, Mail and Safari with "Open in Udfyld". YOUR FILES STAY WITH YOU No account, no ads, no tracking. Udfyld sends nothing over the internet: everything happens on your iPhone. FREE. JUST ENJOY IT. The whole app is free, with every feature, no ads and no subscription. If you're doing alright, you can become a supporter inside the app and get the show-off icons: extra app icons and a silly little game. Nothing gets locked, and freeloaders are still very welcome. In English, Danish, Japanese, German, French, Spanish and Korean.

Screenshots

PDF Compressor4 screens
Udfyld4 screens

Verdict

The call

The clearest difference is ads: Udfyld at none against PDF Compressor's shown. Udfyld also leads on update cadence (every 2 days vs every 6 days). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Scored on Price Ā· Rating Ā· Positive reviews Ā· Number of ratings Ā· Update frequency Ā· Ads Ā· In-app purchases Ā· Monetization Ā· Best chart rank Ā· Devices Ā· Requires iOS

CostPrice Ā· In-app purchases Ā· Ads Ā· Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

PDF Compressor ships an update every 6 days, Udfyld every 2 days. The most recent releases landed on October 16, 2026 and October 14, 2026 respectively.

Scorecard2 real differences Ā· 4 level
PDF Compressor versus Udfyld: the parameters behind the verdict, then further details
ParameterPDF CompressorUdfyld
PriceFreeFree
Update frequencyEvery 6 daysEvery 2 days — better
AdsYesNo — better
In-app purchasesNoNo
DevicesiPhone, iPad — betteriPhone
Requires iOS17.017.0
Further details — not scored
Size7 MB2 MB
Age rating4+4+
DeveloperJeny GoentoroCommanigy

In-app purchases

None

PDF Compressor

No in-app purchases

None

Udfyld

No in-app purchases

Questions

Is PDF Compressor free?
PDF Compressor is free to download, with no in-app purchases.
Is Udfyld free?
Udfyld is free to download, with no in-app purchases.
Do PDF Compressor or Udfyld have ads?
PDF Compressor shows ads; Udfyld does not.
Which is updated more often, PDF Compressor or Udfyld?
PDF Compressor ships an update every 6 days, and Udfyld every 2 days. Most recently, PDF Compressor was updated on October 16, 2026 and Udfyld on October 14, 2026.

Other comparisons