Comparison

PDF Expert vs ThreadVault

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

Head to head
About

PDF Expert

This app allows you to edit, annotate, fill out forms, and convert PDF documents. It offers AI-powered summarization and analysis, along with tools to merge, sign, and protect your files. Work seamlessly across Apple devices with a user-friendly interface.

Highlights
  • Edit PDF text and images
  • Annotate and highlight PDFs
  • Fill out PDF forms
  • Convert files to and from PDF
  • AI-powered summarization and analysis
  • Merge and combine PDF files
  • Sign documents with e-signatures
Features
Read full description

PDF Expert is a fast and easy PDF app to read, annotate, fill and sign PDF forms, convert files to PDF, and merge, split or compress documents – all in one intuitive app for iPhone, iPad, Mac & Vision Pro. Read PDF files with comfort, highlight and mark up text, fill out forms, sign contracts, create and convert PDFs, and summarize long documents in seconds with AI-powered tools. Unlock unlimited possibilities with PDF Expert Premium and work across all your Apple devices. "PDF Expert is one of my must-have iPad apps and a desktop-class PDF reader." – MacStories "The best app for managing, editing, and reading PDFs on your iPad." – The Sweet Setup ▶ WITH PDF EXPERT, YOU CAN: READ PDFs - PDF reader with Day, Night, and Sepia modes for comfortable reading anytime - Scroll PDFs vertically or horizontally and search text in any document - Open and view PDF files from email, web, Files, or any app via the Share menu - Read PDFs out loud with Text to Speech ANNOTATE AND MARK UP PDFs - Highlight, underline, and strike through text in your PDFs - Mark up documents with pen, shapes, text, notes, and comments - Add stamps such as Approved or Confidential - Record your voice and add audio notes to PDFs FILL AND SIGN PDF FORMS - Fill out PDF forms with text fields, checkboxes, and radio buttons - Sign PDF documents in seconds – draw your signature or add it from an image - Save your signature to sign contracts, agreements, invoices, and applications faster - Fill, sign, and send forms right from your iPhone – no printing or scanning needed - Supports all major form formats, including AcroForms and static XFA forms ***PREMIUM FEATURES*** EDIT PDFs - Edit text directly in a PDF – just as you would in a Word document - Add, replace, and resize images in your PDFs - Add links to other pages or websites - Add outlines to navigate large PDFs CREATE AND CONVERT PDFs - Create PDFs from Word files, images, and other documents - Convert Word to PDF, JPG to PDF, and PNG to PDF in seconds - Convert PDF to Word, Excel, PowerPoint, JPG, PNG, and TXT MERGE, SPLIT AND ORGANIZE PDFs - Merge and combine multiple PDF files into one - Split PDFs and extract pages into a new file - Add, delete, rotate, and reorder pages with thumbnail preview COMPRESS PDFs - Compress PDFs to reduce file size for email and sharing - Shrink large PDF files to save space on your device SUMMARIZE PDFs WITH AI – PDF COPILOT - List Main Points – get key takeaways from any PDF - Summarize – get concise summaries of entire PDFs or annotations - Ask Anything – find details with AI answers and references - Explain – get instant explanations of words or phrases PROTECT YOUR FILES - Password-protect PDF Expert - Redact – permanently black out sensitive information WORK WITH SCANNED DOCUMENTS - Open scanned PDFs to fill out, sign, annotate, and share CONSTRUCTION TOOLS - Scale and measure drawings with the Measure tab - Polygon, polyline, and redline tools MORE FEATURES - Customizable toolbar - Presentation Mode - Print and share PDFs via email or cloud ONE ACCOUNT FOR ALL YOUR APPLE DEVICES One Premium subscription covers PDF Expert on iPhone, iPad, and Mac – no need to buy versions separately. Read more about our terms and conditions here: https://pdfexpert.com/privacy https://pdfexpert.com/terms Don’t hesitate to reach out to us at http://readdle.com/contact

About

ThreadVault

Manage your embroidery threads, inventory, and projects efficiently. Catalog threads with color previews, track quantities, plan projects with status updates, and generate shopping lists. Syncs across devices via iCloud.

Highlights
  • Visual thread catalog with color previews
  • Barcode scanner for thread packaging
  • Inventory tracking for skeins and bobbins
  • Project planning with status tracking
  • Automatic thread allocation from inventory
  • PDF export for project reports and shopping lists
  • iCloud sync across devices
Features
Read full description

ThreadVault is a super app for embroidery enthusiasts who use DMC Art. 117 threads. It helps you keep track of threads, inventory, and projects in one place. With ThreadVault, you get a clear catalog, an easy way to manage your inventory, and a handy shopping list. Perfect for keeping track of your embroidery projects! Catalog Browse and explore your thread collection with a beautiful visual catalog. • DMC thread catalog with color previews and EAN • Search by code, name, or color family • Scan thread packaging using the EAN barcode scanner • Filter by color family or discontinued threads • Quickly add threads to your inventory Inventory Always know which threads you have available. • Track quantities of skeins and bobbins • View inventory directly from the catalog • Easily update thread quantities • Keep your embroidery supplies organized Projects Plan and manage your embroidery projects. • Create projects with status tracking (planned, active, completed, archived) • Assign threads with required quantities • Optional automatic allocation from inventory • Add images and notes to projects • Export project reports as PDF Shopping List Never forget a thread again. • Create shopping lists of threads you need. • Mark threads as purchased autoupdate inventory. • Share or print the list as a PDF iCloud Sync Keep your data up to date across devices. • Automatically sync between iPhone and iPad using iCloud • Can be enabled or disabled in Settings ThreadVault supports **DMC Art. 117 thread codes**, but is not affiliated with or endorsed by DMC. No In-App Purchases ThreadVault contains no in-app purchases, subscriptions, or ads. You pay once when purchasing the app on the App Store and get access to all features.

Screenshots

PDF Expert4 screens
ThreadVault4 screens

Verdict

The call

The clearest difference is review sentiment: ThreadVault at 100% against PDF Expert's 45%. ThreadVault also leads on in-app purchases (none vs 10). PDF Expert's advantage is price (Free vs $4.99) and rating (4.7 vs 4.0). On ads 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

PDF Expert is free to download; ThreadVault costs $4.99 up front. PDF Expert sells 9 in-app purchases, starting at $9.99 per month. ThreadVault asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

PDF Expert holds the better App Store score, 4.7 against 4.0. That said, the two scores are not equally well evidenced: PDF Expert has 217K ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 45% of PDF Expert's written reviews are positive against 100% of ThreadVault's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

PDF Expert ships an update fortnightly, ThreadVault every 4 months. The most recent releases landed on November 9, 2026 and October 31, 2026 respectively.

Scorecard9 real differences · 2 level
PDF Expert versus ThreadVault: the parameters behind the verdict, then further details
ParameterPDF ExpertThreadVault
PriceFree — better$4.99
Rating4.7 (217K ratings) — better4.0 (1 ratings)
Positive reviews45.2% of reviews100.0% of reviews — better
Number of ratings217K — better1
Update frequencyFortnightly — betterEvery 4 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases — betterPaid
Best chart rank#89 — better—
DevicesiPhone, iPadiPhone, iPad
Requires iOS16.0 — better18.6
Further details — not scored
Size301 MB9 MB
Age rating4+4+
DeveloperReaddle Technologies LimitedOyvind Brantenberg

Customer experience

PDF Expert

All ratings216,255 ratings
Positive92.4%
Neutral2.3%
Negative5.3%
Written reviews1,186 reviews
Positive45.2%
Neutral7.5%
Negative47.3%

ThreadVault

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

PDF Expert

Reported bugs

4 issues
  • Corrupted PDFs after editing
  • Sync issues with cloud storage providers
  • Unexpected loss of annotations and edits
  • Unreliable performance on older iPad models

Requested features

5 requests
  • Improved palm rejection for Apple Pencil
  • Customizable toolbar and annotation presets
  • Better integration with other productivity apps
  • More flexible file management and organization
  • Ability to create fillable PDF forms

ThreadVault

Not enough reviews yet to summarise bugs or requests.

In-app purchases

9 purchases

PDF Expert

Subscriptions8
  • PDF Expert Premium Trial7 Days trial$9.991 Month
  • PDF Expert Premium No Trial$9.991 Month
  • PDF Expert for Education7 Days trial$39.991 Year
Show 5 more
  • PDF Expert Premium7 Days trial2 variants$49.991 Year
  • PDF Expert Premium New7 Days trial$49.991 Year
  • PDF Expert Premium Existing7 Days trial$49.991 Year
  • PDF Expert – Premium Editing1 Year trial$49.991 Year
  • PDF Expert Mac & iOS7 Days trial$79.991 Year
One-time1
  • PDF Expert Basic$9.99
None

ThreadVault

No in-app purchases

Questions

Is PDF Expert free?
PDF Expert is free to download, with in-app purchases available.
Is ThreadVault free?
ThreadVault costs $4.99, with no in-app purchases.
Which has better reviews, PDF Expert or ThreadVault?
PDF Expert is rated higher. PDF Expert averages 4.7 out of 5 from 217K ratings, while ThreadVault averages 4.0 from 1 ratings.
Do PDF Expert or ThreadVault have ads?
Neither PDF Expert nor ThreadVault shows ads.
Which is updated more often, PDF Expert or ThreadVault?
PDF Expert ships an update fortnightly, and ThreadVault every 4 months. Most recently, PDF Expert was updated on November 9, 2026 and ThreadVault on October 31, 2026.

Other comparisons