Comparison

PDF Tools vs Modysign

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

Head to head
About

PDF Tools

Features
Read full description

PDF Assistant is a powerful all-in-one PDF processing tool that provides professional PDF handling solutions. 【KEY FEATURES】 • PDF Merge: Quickly combine multiple PDFs into one • PDF Split: Divide PDF documents into separate files • PDF Insert: Add new pages to existing PDFs • PDF to Image: Convert PDF pages to high-quality images • Image to PDF: Batch convert images to PDF format • PDF Page Delete: Easily remove specific pages • PDF Watermark: Add custom text or image watermarks 【WHY CHOOSE US】 • User-Friendly: Clean interface with intuitive controls • Comprehensive: All essential PDF tools in one app • Fast Processing: Advanced algorithms for quick results • Local Processing: All operations performed locally for security • No Registration: Start using immediately after download 【PERFECT FOR】 • Work & Study: Organize learning materials and work documents • File Management: Arrange and organize PDF files • Document Editing: Adjust PDF page order • Content Extraction: Extract images from PDFs • Format Conversion: Create PDFs from multiple images 【Subscription Terms】 ■ Subscription Plans • Lifetime (one-time purchase) ■ Member Benefits • Access to all premium features • Unlimited use of all functions • Priority access to new features ■ Subscription Rules • Payment will be charged to iTunes Account at confirmation of purchase • Subscription automatically renews unless auto-renew is turned off at least 24 hours before the end of the current period • Account will be charged for renewal within 24 hours prior to the end of the current period • Any unused portion of a free trial period will be forfeited when purchasing a subscription ■ How to Cancel 1. Open device Settings 2. Tap your Apple ID at the top 3. Tap "Subscriptions" 4. Find "PDF Assistant" and manage subscription ■ Legal • Terms of Service: http://simp.ly/p/5FYqZX • Privacy Policy: http://simp.ly/p/OYXLkD Let PDF Assistant be your PDF expert, making document handling effortless and efficient!

About

Modysign

Features
Read full description

Mody-Sign PDF is the fast, private PDF editor that runs entirely on your iPhone. Sign, edit, scan, convert — no file ever leaves your device. -100% LOCAL — Your documents never leave your iPhone. - NO ACCOUNT REQUIRED — Sign in with Apple only. - FREE TRIAL — 5 uses/month on Edit & Sign and on Scan & Convert. FEATURES EDIT & SIGN • Modify existing PDF text (prices, dates, names…) • Add free text with custom font, size and color • Sign by hand or with a saved signature • Custom stamps: Approved, Confidential, Urgent, Draft • Brush, eraser, selection tools SCAN & CONVERT • Scan a document with the camera → instant PDF • Convert images (JPG, PNG, HEIC) → PDF • Merge multiple PDFs into one • Split a PDF into separate files SECURE (Premium) • Password-protect your PDFs • AES-256 encryption • Unlock encrypted PDFs REQUEST SIGNATURE (Premium) • Send a PDF to be signed by email • Real-time signature tracking AVAILABLE IN 3 LANGUAGES French, English, Spanish — switch instantly. PRIVACY No file is ever uploaded. No telemetry. No ad tracking. Everything stays on your iPhone. FREEMIUM MODEL • Edit & Sign: 5/month free, then Premium for unlimited • Scan & Convert: 5/month free, then Premium • Secure: Premium only • Request Signature: Premium only • Monthly or annual subscription via App Store Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

PDF Tools3 screens
Modysign3 screens

Verdict

The call

The clearest difference is ads: Modysign at none against PDF Tools's shown. Modysign also leads on update cadence (every 4 days vs every 5 months). On price, in-app purchases, device support and iOS requirement 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 Tools sells 2 in-app purchases, starting at $2.99 per 7 days and Modysign sells 1 in-app purchase, starting at $2.00 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

PDF Tools ships an update every 5 months, Modysign every 4 days. The most recent releases landed on October 25, 2026 and October 31, 2026 respectively.

Scorecard2 real differences · 4 level
PDF Tools versus Modysign: the parameters behind the verdict, then further details
ParameterPDF ToolsModysign
PriceFreeFree
Update frequencyEvery 5 monthsEvery 4 days — better
AdsYesNo — better
In-app purchasesYesYes
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS16.015.0 — better
Further details — not scored
Size5 MB3 MB
Age rating4+4+
Developer云峰 林Romain Fernandes lopes

In-app purchases

2 purchases

PDF Tools

Subscriptions1
  • PDF Assistant Weekly VIP+Trial3 Days trial$2.997 Days
One-time1
  • PDF Assistant Permanent VIP$3.99
1 purchases

Modysign

Subscriptions1
  • Mody-Sign Premium Monthly$2.001 Month

Questions

Is PDF Tools free?
PDF Tools is free to download, with in-app purchases available.
Is Modysign free?
Modysign is free to download, with in-app purchases available.
Do PDF Tools or Modysign have ads?
PDF Tools shows ads; Modysign does not.
Which is updated more often, PDF Tools or Modysign?
PDF Tools ships an update every 5 months, and Modysign every 4 days. Most recently, PDF Tools was updated on October 25, 2026 and Modysign on October 31, 2026.

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