Comparison

Nitro PDF Pro vs Forma

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

Head to head
About

Nitro PDF Pro

Edit, read, sign, and secure PDF documents on your iOS device. This powerful yet lightweight app allows for on-the-go productivity with features like text editing, annotation, form filling, and cloud syncing.

Highlights
  • Edit PDF text
  • Annotate and highlight PDFs
  • Fill and save PDF forms
  • Sign and share PDF documents
  • Password protect PDFs
  • Sync with cloud storage
  • Merge and organize PDFs
Features
Read full description

Ready to do more with PDFs on iPad & iPhone? Edit, read, sign and sync PDFs in the cloud with the powerful, lightweight Nitro PDF Pro app designed for iPad & iPhone users. Packed with features to help you stay productive on the go, Nitro PDF Pro for iPad & iPhone lets you edit, sign, share and manage your documents wherever you are - all in a secure and user-friendly interface. Get started for free with a 14-day trial today. “Superior PDF handling, & economical” “Nitro PDF Pro has become an essential tool in my daily business operations! It makes everything from document preparation to communication much easier for me.” “If you are looking for a workhorse app to handle your PDFs made by responsive developers, look no further...” -> With Nitro PDF Pro you can: EDIT PDFs ON THE GO * Easily edit PDF text wherever you are, on any iOS device * Make notes and add comments to PDFs for quick, on-the-go reference * Add images or mark-up PDFs with drawings, with stylus support for iPad ANNOTATE & HIGHLIGHT PDFs * Add annotations to PDF text and documents * Highlight text to stay organized and keep track of important information FILL & SAVE PDF FORMS * Fill and save PDF forms for fast & easy productivity * Keep your PDF forms secure with password protection SIGN & SHARE PDF DOCUMENTS * Sign & share PDF documents in a snap * Save text, signatures and images in your Library for easy re-use * Keep documents synced with the cloud for on-the-go signatures PROTECT, SECURE & SYNC PDFs * Password protect PDFs to keep your data and confidential information secure * Set the level of document encryption as required * Sync with the cloud to back up PDFs on iCloud, Dropbox, Google Drive, or Microsoft OneNote MERGE, EXPORT & ORGANIZE PDFs * Merge multiple documents into one PDF in just a few clicks for easy organization * Import, export & organize PDFs in folders for fast access and easy on-the-go editing * Duplicate, add, delete or rearrange pages for simple, custom document creation ADDITIONAL AMAZING PDF EDITOR FEATURES * Duplicate, add, delete, rotate and rearrange pages * Enable easier PDF reading with dark mode, search and zoom * Email & Airdrop your documents, with PDF flattening for maximum compatibility * View two documents simultaneously with multiple windows (iPadOS) * Bluetooth pressure-sensitive stylus support - automatically works with Apple Pencil * Support for Adonit Jot Touch and Jot Script styluses Still exploring PDF editors for iOS? No pressure! Give Nitro PDF Pro iOS a try for free with a 14-day trial and see how you like its features and functions. We think you’ll love the value we pack into our easy-to-use PDF iOS app. Questions and issues regarding our PDF app? We're here to help! Connect with Nitro through our Community Forum: https://community.gonitro.com/ NITRO POLICY https://www.gonitro.com/legal/privacy-policy https://www.gonitro.com/legal/terms-of-service

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

Nitro PDF Pro4 screens
Forma4 screens

Verdict

The call

The clearest difference is review sentiment: Forma at 69% against Nitro PDF Pro's 13%. Forma also leads on rating (4.7 vs 3.9) and ratings volume (26K vs 158). Nitro PDF Pro's advantage is ads (none vs shown). On price, in-app purchases, 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. Nitro PDF Pro sells 2 in-app purchases, starting at $19.99 per year 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 3.9. That said, the two scores are not equally well evidenced: Forma has 26K ratings behind it against 158, so its average is the more settled of the two. Written reviews point the same way: 13% of Nitro PDF Pro's written reviews are positive against 69% of Forma's.

UpkeepUpdate frequency

Nitro PDF Pro ships an update every 2 months, Forma monthly. The most recent releases landed on September 20, 2026 and September 25, 2026 respectively.

Scorecard6 real differences · 5 level
Nitro PDF Pro versus Forma: the parameters behind the verdict, then further details
ParameterNitro PDF ProForma
PriceFreeFree
Rating3.9 (158 ratings)4.7 (26K ratings) — better
Positive reviews12.5% of reviews69.1% of reviews — better
Number of ratings15826K — better
Update frequencyEvery 2 monthsMonthly — better
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFreemium
Best chart rank—#102 — better
DevicesiPhone, iPadiPhone, iPad
Requires iOS18.018.0
Further details — not scored
Size59 MB201 MB
Age rating4+4+
DeveloperNitro Software, Inc.BPMobile

Customer experience

Nitro PDF Pro

All ratings157 ratings
Positive70.1%
Neutral5.1%
Negative24.8%
Written reviews64 reviews
Positive12.5%
Neutral6.3%
Negative81.3%

Forma

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

User reviews

Nitro PDF Pro

From 158 App Store ratings

What we love

  • 👍 Helpful for managing project documents
  • 👍 Convenient for PDF modifications
  • 👍 Superior PDF handling on Mac
  • 👍 Satisfactory in both Mac and Windows environments

Room to improve

  • 👎 Pro features not available on iOS/iPadOS
  • 👎 Yearly charges for basic features
  • 👎 Expensive and useless
  • 👎 Fails to deliver promised features
  • 👎 Impossible to reorder PDF files

Forma

From 26K App Store ratings

What we love

  • 🚀 Fast and efficient
  • 👍 Easy to use
  • 💡 Useful features like autofill and cloud sync
  • 🚀 Seamless document management

Room to improve

  • 🐛 Crashes and glitches
  • 💰 Expensive subscription
  • 🔒 Difficult to cancel subscription
  • 🚫 Limited editing capabilities

Bugs and requests

Nitro PDF Pro

Reported bugs

19 issues
  • Cannot reorder PDF files
  • Crashes when opening PDFs from websites/email
  • Does not save markups or documents
  • Difficulty creating new folders
  • Cannot rotate pages
Show 14 more
  • Cannot markup/draw on PDFs with editing disabled
  • Does not save documents after editing
  • Cannot rotate PDFs
  • Program freezes up
  • Fails to save after deleting pages
  • App crashes after update
  • Editing is lost prior to crash
  • Crashes every time to edit a PDF
  • Cannot handle deleting pages
  • Crashes when opening fillable PDFs
  • Crashes when typing in fields
  • No Apple Pencil support
  • Stylus link gives 404 error
  • Bugs like suddenly not being able to draw

Requested features

10 requests
  • Keyboard support (Cmd + F for search)
  • Ability to cancel search with Esc
  • OCR and conversion to text documents on tablets
  • User manual for iPad app
  • Support for Apple Pencil
Show 5 more
  • Ability to create table of contents
  • Ability to create fillable forms
  • Ability to rearrange pages
  • Ability to add to library
  • More intuitive interface

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

2 purchases

Nitro PDF Pro

Subscriptions1
  • Annual Subscription14 Days trial$19.991 Year
One-time1
  • Nitro PDF Pro for iOS$9.99
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 Nitro PDF Pro free?
Nitro PDF Pro 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, Nitro PDF Pro or Forma?
Forma is rated higher. Nitro PDF Pro averages 3.9 out of 5 from 158 ratings, while Forma averages 4.7 from 26K ratings.
Do Nitro PDF Pro or Forma have ads?
Forma shows ads; Nitro PDF Pro does not.
Which is updated more often, Nitro PDF Pro or Forma?
Nitro PDF Pro ships an update every 2 months, and Forma monthly. Most recently, Nitro PDF Pro was updated on September 20, 2026 and Forma on September 25, 2026.

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