Comparison

iZip.com vs Sign PDF

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

Head to head
About

iZip.com

Easily view and manage ZIP, ZIPX, RAR, and 7ZIP files directly on your iOS device. Access password-protected archives without any limitations. All features are available for free.

Highlights
  • View ZIP, ZIPX, RAR, 7ZIP files
  • Access password-protected archives
  • Local file processing
  • No limitations
Features
Read full description

iZip is the easiest way to view ZIP, ZIPX, RAR and 7ZIP files on your iOS device. Best of all it's completely free so you can access your files (even WinZip password protected versions) without limitations! Note: while the app is called iZip.com, it isn't a web service. Your files are processed locally on your iPhone or iPad. For more information about iZip please visit www.izip.com

About

Sign PDF

Easily add your signature to PDF documents using your device. Create signatures by taking a photo, using special fonts, drawing on screen, or importing an image. Export signed documents as PDFs or JPEGs, and print or share them directly.

Highlights
  • Apply signature to PDF
  • Export as PDF
  • PDF to JPEG conversion
  • Print from device
  • Share via email
  • Multiple signature creation modes
Features
Read full description

Sign a PDF and send it back in under a minute — without leaving your iPhone. Sign PDF is the fast, private way to sign documents, fill forms and get paperwork done. Import a PDF, tap where to sign, and share the finished file. No account, no uploads, no waiting. WHY YOU'LL LOVE IT • Sign any PDF or document in seconds • Everything happens on your device — nothing is ever uploaded • Works completely offline • No sign-up, no subscription required to get started • Exports a clean, flattened PDF — never watermarked SIGN YOUR WAY • Draw your signature with a finger or Apple Pencil • Snap a photo of your signature on paper — the background is removed automatically • Type your name in a handwritten-style font • Save multiple signatures and initials, then reuse them with one tap FILL & COMPLETE • Add free-form text boxes anywhere, with size and color control • Quick Fields: save your name, company, email and address once, insert them instantly • Date tool with auto-today and your preferred format • Add checkmarks and X-marks to tick boxes • Fill interactive form fields (AcroForm) IMPORT FROM ANYWHERE • Open PDFs straight from Mail, Files or iCloud Drive • Scan paper documents with your camera • Turn photos into a PDF EXPORT & SHARE • Flatten and share via the standard share sheet • Print, or save back to Files • The original document is never changed until you export FREE VS PRO Free: sign documents every month, one saved signature, text and date tools included, full-quality export. Pro unlocks: unlimited documents, the document scanner, photo and typed signature capture, multiple signatures and initials, Quick Fields and interactive form filling. PRIVACY FIRST Your documents are yours. Sign PDF has no backend and no account system. Files stay in the app, protected on your device, and are never sent to a server. Sign contracts, agreements and sensitive paperwork with total peace of mind — even in airplane mode. Download Sign PDF and turn your iPhone into a pocket signing tool. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://keysersoft.com/signpdf/privacy-policy

Screenshots

iZip.com4 screens
Sign PDF4 screens

Verdict

The call

The clearest difference is in-app purchases: iZip.com at none against Sign PDF's 3. iZip.com also leads on review sentiment (40% vs 7%) and update cadence (every 3 weeks vs every 69 months). On price, ads, monetization model 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. Sign PDF sells 3 in-app purchases, starting at $3.99 per 7 days. iZip.com asks for nothing beyond the download.

UpkeepUpdate frequency

iZip.com ships an update every 3 weeks, Sign PDF every 69 months. The most recent releases landed on October 23, 2026 and October 24, 2026 respectively.

Scorecard4 real differences · 6 level
iZip.com versus Sign PDF: the parameters behind the verdict, then further details
ParameteriZip.comSign PDF
PriceFreeFree
Rating2.8 (40 ratings) — better—
Positive reviews39.7% of reviews — better7.1% of reviews
Number of ratings40 — better—
Update frequencyEvery 3 weeks — betterEvery 69 months
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFreeFree
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS5.0 — better17.0
Further details — not scored
Size2 MB3 MB
Age rating4+4+
DeveloperiBoostUp Pty LtdMatteo Morelli

Customer experience

iZip.com

All ratings40 ratings
Positive45.0%
Neutral7.5%
Negative47.5%
Written reviews58 reviews
Positive39.7%
Neutral5.2%
Negative55.2%

Sign PDF

Written reviews14 reviews
Positive7.1%
Neutral0.0%
Negative92.9%

In-app purchases

None

iZip.com

No in-app purchases

3 purchases

Sign PDF

Subscriptions2
  • Firma Pro Weekly3 Days trial$3.997 Days
  • Firma Pro Yearly$22.991 Year
One-time1
  • Firma Pro Lifetime$49.99

Questions

Is iZip.com free?
iZip.com is free to download, with no in-app purchases.
Is Sign PDF free?
Sign PDF is free to download, with in-app purchases available.
Do iZip.com or Sign PDF have ads?
Neither iZip.com nor Sign PDF shows ads.
Which is updated more often, iZip.com or Sign PDF?
iZip.com ships an update every 3 weeks, and Sign PDF every 69 months. Most recently, iZip.com was updated on October 23, 2026 and Sign PDF on October 24, 2026.

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