Comparison

PDF Studio vs Tread

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

Head to head
About

PDF Studio

Features
Read full description

PDF Studio — your complete PDF solution for iPhone and iPad. Scan, edit, sign, convert, and manage documents with professional-grade tools, all in one app. SCAN & DIGITIZE • Intelligent document scanner with auto-edge detection • Multi-page scanning in seconds • High-quality PDF output from any paper document EDIT & ANNOTATE • Add text, images, and shapes to any PDF • Highlight, underline, and strike through text • Draw and sketch with precision tools • Reorder, rotate, and delete pages SIGN DOCUMENTS • Create and save multiple signatures • Sign contracts, forms, and agreements instantly • Professional digital signatures CONVERT ANYTHING • PNG, JPG, HEIC, WebP → PDF • PDF → PNG, JPG images • TXT ↔ PDF conversion • Batch convert multiple files COMPRESS & OPTIMIZE • Reduce PDF size up to 70% • Three compression levels: Light, Medium, Maximum • Perfect for email attachments and sharing POWERFUL TOOLS • OCR: Extract text from images and scans • Merge: Combine multiple PDFs into one • Split: Separate PDF into individual pages • Print: Direct printing to any AirPrint device ORGANIZE YOUR FILES • Create folders and organize documents • Quick search across all files • Favorites for fast access • Recent files tracking CLOUD SYNC • Automatic iCloud synchronization • Access documents on all your Apple devices • Secure cloud backup WHY PDF STUDIO? No watermarks on your documents Works offline — no internet required Privacy first — files stay on your device Clean, intuitive interface Regular updates with new features Perfect for students, professionals, and anyone who works with documents. Download PDF Studio and take control of your PDFs today! Download PDF Studio today and experience the most powerful PDF toolkit for iOS! Terms of Use: https://github.com/spiroba/pdf-studio-legal/blob/main/TERMS_OF_USE.md

About

Tread

Instantly analyze your tire health using your phone's camera. Get advanced tread-depth and tire-condition reports in seconds, no tools or appointments needed. Stay safer on the road with smart ML-powered tire inspection.

Highlights
  • ML-powered tire inspection
  • Phone camera analysis
  • Instant tread-depth reports
  • Tire condition analysis
  • No tools required
  • No appointments needed
Features
Read full description

TreadAI – Smart Tire Health Scanner TreadAI is an ML-powered tire inspection app that helps drivers stay safer on the road by instantly analyzing tire health using only their phone camera. No tools, no appointments. Just snap a photo and get an advanced tread-depth and tire-condition report in seconds. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://www.tread-ai.com/privacy

Screenshots

PDF Studio4 screens
Tread4 screens

Verdict

The call

The clearest difference is update cadence: Tread at every 4 days against PDF Studio's every 2 weeks. Tread also leads on iOS requirement (13.4 vs 17.6). On price, ads, in-app purchases 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. PDF Studio sells 3 in-app purchases, starting at $2.49 per 7 days and Tread sells 1 in-app purchase, starting at $2.99 per year. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

PDF Studio ships an update every 2 weeks, Tread every 4 days. The most recent releases landed on October 18, 2026 and October 15, 2026 respectively.

Scorecard2 real differences · 8 level
PDF Studio versus Tread: the parameters behind the verdict, then further details
ParameterPDF StudioTread
PriceFreeFree
Rating—4.5 (10 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—10 — better
Update frequencyEvery 2 weeksEvery 4 days — better
AdsNoNo
In-app purchasesYesYes
Monetization—Free
DevicesiPhone, iPadiPhone, iPod
Requires iOS17.613.4 — better
Further details — not scored
Size6 MB26 MB
Age rating4+17+
DeveloperBoris SpiroMajid Sadri

In-app purchases

3 purchases

PDF Studio

Subscriptions3
  • Weekly Premium$2.497 Days
  • Monthly Premium$4.991 Month
  • Annual Premium$29.991 Year
1 purchases

Tread

Subscriptions1
  • Pro Annual$2.991 Year

Questions

Is PDF Studio free?
PDF Studio is free to download, with in-app purchases available.
Is Tread free?
Tread is free to download, with in-app purchases available.
Do PDF Studio or Tread have ads?
Neither PDF Studio nor Tread shows ads.
Which is updated more often, PDF Studio or Tread?
PDF Studio ships an update every 2 weeks, and Tread every 4 days. Most recently, PDF Studio was updated on October 18, 2026 and Tread on October 15, 2026.

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