Comparison

Sign PDF documents vs Forma

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

Head to head
About

Sign PDF documents

Easily sign documents digitally without printing. This app allows for unlimited signatures without requiring a subscription or registration, making document signing quick and convenient.

Highlights
  • Unlimited digital signatures
  • No subscription required
  • No registration needed
  • Sign without printing
  • Document archiving
Features
Read full description

Sign any document in seconds — right from your iPhone and iPad. Got a contract by email? Sign it and send it back in under a minute: no printer, no scanner, no stress. SIGN IN 3 SIMPLE STEPS 1. Import any PDF or scan a paper document with your camera 2. Draw your signature with your finger — save it once, reuse it forever 3. Place it on the document, save and share EVERYTHING YOU NEED • Create and save multiple signatures and your initials • Built-in scanner: turn paper into a signable PDF • Add text and today's date with one tap • Fill and sign contracts, forms, quotes and leases • Sign multi-page documents, page by page • Your documents never leave your device: private and secure • Works offline — no account, no registration Perfect for freelancers, small businesses, real estate agents, HR — and anyone who hates printers. Download Sign PDF and sign your first document in less than a minute! Unlock all Sign PDF Pro features by choosing the plan that best fits your needs: Auto-Renewing Subscriptions * Monthly: Full access to all Pro features. * Yearly: Full access with a 3-day free trial. Subscription Details: * Payment will be charged to your iTunes account at confirmation of purchase. * Subscriptions automatically renew unless auto-renew is turned off at least 24 hours before the end of the current period. * Your account will be charged for renewal within 24 hours prior to the end of the current period. * You can manage your subscriptions and turn off auto-renewal by going to your Account Settings after purchase. * Any unused portion of a free trial period, if offered, will be forfeited when you purchase a subscription. One-Time Purchase * Lifetime Access: A one-time payment for lifetime access to all Pro features of Sign PDF. No recurring fees. Pro features include: unlimited signed documents, built-in document scanner, and an ad-free experience. Legal Information * Privacy Policy: https://www.freeprivacypolicy.com/privacy/view/000ea101de4e771dc9cc10e883deab0c * Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Forma

This AI-powered app allows users to edit, fill, sign, scan, and convert PDF documents. It offers features like text editing, form filling, e-signatures, OCR scanning, and file conversion. An AI assistant can summarize, rewrite, or generate content, and users can create invoices and resumes.

Highlights
  • AI-powered PDF editing
  • Fill and e-sign forms
  • Built-in OCR scanner
  • Convert PDFs to various formats
  • AI assistant for content generation
  • Create and send invoices
  • Resume builder
Features
Read full description

Meet Forma—your AI-powered PDF editor that lets you fill, sign, scan, and edit documents. Contracts to sign, forms to fill, files to convert—and no laptop in sight. With Forma, all you need is your phone: edit text, fill out forms, add your signature, scan paper, and convert between formats without disrupting the layout. When a document needs more than editing—a summary, a rewrite, a draft from scratch—the built-in AI assistant will take care of that too. From the creators of iScanner, trusted by 145M+ users. With Forma, you get: • A clean interface that keeps PDF work intuitive. • A built-in scanner with OCR that turns paper into searchable, editable files. • An AI assistant that summarizes, catches mistakes, and generates content. • Secure cloud storage synced across iPhone, iPad, and web. Here's what that looks like: EDIT PDFs WITHOUT LOSING THE LAYOUT Need to update a figure in a proposal or fix a heading before a deadline? Tap any text to edit it—Forma auto-matches fonts so the document looks untouched. You can also highlight sections, add notes, insert images, and split or merge files. VIBE EDIT PDFs WITH A TEXT OR VOICE PROMPT Instead of manually editing PDFs, let the app do the work. Tell Vibe Edit what you want to change by typing a message or recording a voice command, and get your updated PDF right away. FILL & SIGN FORMS WITHOUT PRINTING Tax form, lease, job application—complete any form right in the app. With autofill, you can speed through repetitive fields. Draw or type your electronic signature once, save it, and apply it whenever you need. TURN PAPER DOCS INTO FILES Not every document starts digital. Unlike most PDF editors, Forma has a full scanner built in—point your camera at an agreement, a receipt, or a note, and it becomes a clean, searchable PDF with OCR. CONVERT FILES BETWEEN FORMATS Client needs your PDF as a Word document? Professor wants the assignment in a different format? Convert seamlessly between PDF, Word, Excel, PowerPoint, JPG, and TXT in both directions. LET AI DO THE HEAVY LIFTING Long contract before a meeting? Email that needs a different tone? Summarize lengthy documents, rewrite and polish text, or catch grammar and logic mistakes. Plus, generate cover letters, emails, and more with ready-made templates. CREATE AND SEND INVOICES ON THE GO Project done, time to get paid. Add line items, taxes, and terms, then share with a link or export as a PDF—built for freelancers and remote workers who invoice on the go. BUILD A RESUME THAT STANDS OUT Enter your details and career goals—the AI handles layout, formatting, and design. Whether you're a student entering the job market or making a career move, the result is a professional CV ready to send in minutes. KEEP YOUR FILES SAFE AND SYNCED Store documents securely in the cloud and access them across every Apple device. Blur confidential information before sharing, add watermarks to protect your work, and lock folders with a PIN for added peace of mind. Edit, sign, fill, scan, and convert—Forma is the PDF editor that turns your phone into a document workspace. Download it today. FAQ Q: Can I use Forma offline? A: Yes. Editing, form filling, and signing all work without a connection. Cloud sync and AI features require an internet connection. Q: Who can see my documents? A: Only you. Files are encrypted in cloud storage and never shared with third parties. Q: Can I use Forma on both iPhone and iPad? A: Yes. Your files sync automatically between devices through secure cloud storage. Forma PRO – Subscribe to get Pro access to all features. You will be charged after the purchase confirmation. – Subscriptions auto-renew 24 hours before the expiration date. You can manage them in your Account Settings on the App Store. Privacy Policy: http://bpmob.com/forma/privacy/en/ Terms of Use: http://bpmob.com/forma/terms/en/ For any questions or inquiries about Forma, our PDF reader, contact us at http://bpmob.com/forma/support.

Screenshots

Sign PDF documents4 screens
Forma4 screens

Verdict

The call

The clearest difference is review sentiment: Forma at 69% against Sign PDF documents's 22%. Forma also leads on rating (4.7 vs 1.0) and ratings volume (26K vs 1). Sign PDF documents's advantage is monetization model (ad-supported vs freemium) and device support (4 vs 2). On price, update cadence, ads and in-app purchases 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 documents sells 3 in-app purchases, starting at $2.99 per month and Forma sells 17 in-app purchases, starting at $3.99 per 7 days. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Forma holds the better App Store score, 4.7 against 1.0. That said, the two scores are not equally well evidenced: Forma has 26K ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 22% of Sign PDF documents's written reviews are positive against 69% of Forma's.

UpkeepUpdate frequency

Sign PDF documents ships an update every 3 weeks, Forma monthly. The most recent releases landed on August 14, 2026 and September 24, 2026 respectively.

Scorecard7 real differences · 4 level
Sign PDF documents versus Forma: the parameters behind the verdict, then further details
ParameterSign PDF documentsForma
PriceFreeFree
Rating1.0 (1 ratings)4.7 (26K ratings) — better
Positive reviews22.2% of reviews69.1% of reviews — better
Number of ratings126K — better
Update frequencyEvery 3 weeks — betterMonthly
AdsYesYes
In-app purchasesYesYes
MonetizationAd-supported — betterFreemium
Best chart rank—#105 — better
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPad
Requires iOS15.0 — better18.0
Further details — not scored
Size19 MB201 MB
Age rating4+4+
DeveloperEmanuele FlorisBPMobile

Customer experience

Sign PDF documents

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews18 reviews
Positive22.2%
Neutral0.0%
Negative77.8%

Forma

All ratings25,863 ratings
Positive92.1%
Neutral1.8%
Negative6.1%
Written reviews560 reviews
Positive69.1%
Neutral1.6%
Negative29.3%

Bugs and requests

Sign PDF documents

Not enough reviews yet to summarise bugs or requests.

Forma

Reported bugs

3 issues
  • Incorrect document formatting after editing
  • Inability to load or edit pre-existing documents
  • Unexpected charges and billing issues

Requested features

4 requests
  • Undo/redo functionality
  • Ability to edit existing text in documents
  • Support for more file formats
  • Stylus support for precise editing

In-app purchases

3 purchases

Sign PDF documents

Subscriptions2
  • Unlimited Access$2.991 Month
  • Unlimited Access3 Days trial$8.991 Year
One-time1
  • PRO Lifetime Access$22.99
17 purchases

Forma

Subscriptions17
  • Forma Pro3 Days trial$3.997 Days
  • Forma Pro$4.997 Days
  • Forma Pro3 Days trial2 variants$4.997 Days
Show 14 more
  • Forma Pro$5.997 Days
  • Forma Pro3 Days trial$5.997 Days
  • Forma Pro$6.997 Days
  • Forma Pro3 Days trial2 variants$6.997 Days
  • Forma Pro3 Days trial$9.991 Month
  • 1 month Pro 100Gb storage3 Days trial$10.991 Month
  • 1 year Pro 10Gb storage$19.991 Year
  • Forma Pro$20.991 Year
  • 1 year Pro 100Gb storage$24.991 Year
  • Forma Pro$24.991 Year
  • Forma Pro$29.991 Year
  • Forma Pro$39.991 Year
  • Forma Pro3 Days trial$39.991 Year
  • Forma Pro3 Days trial$59.991 Year

Questions

Is Sign PDF documents free?
Sign PDF documents is free to download, with in-app purchases available.
Is Forma free?
Forma is free to download, with in-app purchases available.
Which has better reviews, Sign PDF documents or Forma?
Forma is rated higher. Sign PDF documents averages 1.0 out of 5 from 1 ratings, while Forma averages 4.7 from 26K ratings.
Do Sign PDF documents or Forma have ads?
Both Sign PDF documents and Forma show ads.
Which is updated more often, Sign PDF documents or Forma?
Sign PDF documents ships an update every 3 weeks, and Forma monthly. Most recently, Sign PDF documents was updated on August 14, 2026 and Forma on September 24, 2026.

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