Comparison

Engineer Pro Toolkit vs Combine PDF

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

Head to head
About

Engineer Pro Toolkit

Features
Read full description

Engineering Calculator Pro is a complete professional toolkit designed for engineers, students, contractors, and technical professionals. This powerful app includes 60+ advanced engineering calculators across: Civil Engineering Calculators (29 Tools) • Cantilever Beam (All Load Variations) • Beam Slope & Deflection • Pipeline Flow Rate • Flexible Pavement Structural Number • Highway Vertical & Horizontal Curves • Stopping Distance • Earthwork Volume • Concrete Slab & Footing Calculators • Concrete Volume (Rectangle, Circle, Triangle) • Wall Load & Floor Live Load • Cubic Yards & Unit Conversions • And much more… Perfect for site engineers, structural engineers, and transportation engineers. Electrical Engineering Calculators (18 Tools) • Cable Length from Sag & Span • Resonant Frequency • RC Time Constant • Capacitor Energy • Inductance & Coil Calculations • Microstrip Impedance • Power Factor • 3-Phase Power Calculator • Gear Ratio • mAh Power Consumption • Young’s Modulus • And more… Ideal for electrical engineers, electronics students, and technicians. Mechanical Engineering Calculators (12 Tools) • Hydraulic Cylinder Force • Lathe Machining Time • Screw Thread Shear Area • Ultimate Tensile Stress • Beam Maximum Deflection • Mohr’s Circle • Surface Roughness • Square Tube Calculations • And more… Designed for mechanical engineers and workshop professionals. Why Choose This App? • Clean and Professional Interface • Accurate Engineering Formulas • Easy Unit Input • Instant Results • Lightweight & Fast • Designed for Field Use • Perfect for Students & Professionals Save time on site, in the workshop, or in the classroom. In app purchase included : Lifetime Premium Privacy policy : https://privacypolicy50.wordpress.com/privacy-policy-subscription/ Terms and condition :https://privacypolicy50.wordpress.com/terms-and-condition/

About

Combine PDF

Features
Read full description

Combine PDF - Merge PDF is your all-in-one PDF toolkit for combining documents, edit pages, compress files, add watermarks, scan papers, and manage everything in one clean app. Whether you're merging reports for work, organizing study notes, preparing business documents, managing contracts, combining invoices, or creating shareable PDF files, Merge PDF makes it fast and simple. Pick files from the Files app, reorder them, and combine into a single PDF in just a few taps. Designed for students, professionals, teachers, business owners, office workers, freelancers, and everyday users, Merge PDF provides powerful PDF tools in a simple and intuitive interface. MERGE PDF FILES 
• Combine multiple PDFs into one document
 • Import files from Files with multi-select
 • Drag to reorder before merging
 • Remove unwanted files from the list
 • Share your merged PDF instantly
 • Auto-saved to My Creation for easy access
 
• Quickly organize files before exporting
 • Preserve original PDF quality during merging
 EDIT & ANNOTATE
 • Highlight text with color options
 • Draw freehand notes on any page
 • Add and reposition text anywhere
 • Select and copy text from PDFs
 • Undo annotations and save a new copy
 • Mark important sections for review
 • Add comments and visual notes to documents
 • Ideal for study material, contracts, manuals, and reports
 • Create personalized annotated PDF copies READ & VIEW
 • Built-in PDF reader with smooth scrolling
 • Open password-protected documents
 • Quickly browse multi-page PDFs
 • Read documents comfortably on iPhone and iPad
 • Smooth navigation between pages
 • View documents without needing third-party apps SPLIT & ORGANIZE
 • Split by fixed page count or custom ranges (e.g. 1–3, 5, 8–10)
 • Rearrange pages with drag-and-drop
 • Remove unwanted pages
 • Rotate all pages 90°, 180°, or 270°
 • Create smaller PDFs from larger documents
 • Organize pages exactly how you need them
 • Remove unnecessary content before sharing
 • Prepare custom document versions for clients, teams, or personal use WATERMARK, STAMP & PAGE NUMBERS
 • Add custom watermarks with opacity, size, and angle control
 • Single or tiled watermark across every page
 • Add bold stamps like APPROVED or CONFIDENTIAL
 • Add "Page X of Y" numbers in your chosen position
 • Protect document ownership with custom branding
 • Apply consistent page numbering throughout documents
 • Customize watermark appearance for professional results
 • Great for business reports, contracts, and official documents CREATE PDFs
 • Convert photos to PDF
 • Scan documents with your camera and export as PDF
 • Choose A4 or Letter page size with adjustable margins
 • Turn receipts, notes, forms, and paperwork into PDFs
 • Create professional-looking PDF documents from images
 • Combine multiple photos into a single PDF file
 • Save and share scanned documents instantly
 • Perfect for digitizing paper documents COMPRESS & PROTECT
 • Reduce file size with Low, Medium, or High compression
 • Add password protection to secure your PDF
 • Remove password and save an unlocked copy
 • Share smaller files more easily
 • Optimize PDFs for email and online sharing
 • Protect sensitive documents from unauthorized access
 • Balance quality and file size according to your needs
 • Manage document security with ease PRINT & SHARE 
• Print PDFs with native iOS print options 
• Share any file via the iOS Share Sheet
 • Export files quickly and efficiently
 • Share work, study, and personal documents in seconds
 • Compatible with standard iOS sharing workflows MY CREATION
 • All exported PDFs saved in one place
 • Open, share, swipe to delete, or bulk delete
 • Re-open saved files in any tool
 • Easily manage previously created documents
 • Quickly locate recent exports
 • Keep your PDF organized
 Download Combine PDF - Merge PDF today and handle every PDF task in one app. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula

Screenshots

Engineer Pro Toolkit4 screens
Combine PDF4 screens

Verdict

The call

The clearest difference is ads: Engineer Pro Toolkit at none against Combine PDF's shown. Engineer Pro Toolkit also leads on iOS requirement (13.0 vs 16.0). On price, 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. Engineer Pro Toolkit sells 1 one-off in-app purchase and Combine PDF sells 2 in-app purchases, starting at $1.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Scorecard2 real differences · 4 level
Engineer Pro Toolkit versus Combine PDF: the parameters behind the verdict, then further details
ParameterEngineer Pro ToolkitCombine PDF
PriceFreeFree
Update frequency—Every 6 weeks
AdsNo — betterYes
In-app purchasesYesYes
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS13.0 — better16.0
Further details — not scored
Size74 MB17 MB
Age rating4+4+
DeveloperShital GorasiyaDonda Arvindbhai

In-app purchases

1 purchases

Engineer Pro Toolkit

One-time1
  • Lifetime Purchase$12.99
2 purchases

Combine PDF

Subscriptions1
  • Weekly Premium7 Days trial$1.997 Days
One-time1
  • Lifetime Premium Access$19.99

Questions

Is Engineer Pro Toolkit free?
Engineer Pro Toolkit is free to download, with in-app purchases available.
Is Combine PDF free?
Combine PDF is free to download, with in-app purchases available.
Do Engineer Pro Toolkit or Combine PDF have ads?
Combine PDF shows ads; Engineer Pro Toolkit does not.

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