Best E-Signature Apps for iPhone & Android (2026 Comparison)

# E-Signature Mobile Apps: Complete Guide for iOS and Android 2026

Mobile e-signature apps let you sign documents anywhere, anytime from your phone or tablet. This guide covers the best apps, features to look for, and how to sign professionally on mobile.

Why Use Mobile E-Signature Apps?

The Mobile Reality

• 73% of business documents are first viewed on mobile
• 48% of signatures are completed entirely on mobile devices
• Mobile signing is 3x faster than desktop (average 90 seconds)
• Critical for remote work and field service

Use Cases

• Real Estate: Sign contracts at showings
• Sales: Close deals on the go
• Field Service: Get customer approvals onsite
• HR: Enable employees to onboard from anywhere
• Executives: Sign urgent docs while traveling

Best Mobile E-Signature Apps 2026

1. SignQuick Mobile

Platforms: iOS 14+, Android 10+

Price: Free (3 docs/month), Unlimited from $10/month

Rating: 4.8/5 stars

Key Features:

• ✅ Works offline (syncs when online)
• ✅ Draw with finger or stylus
• ✅ Take photo to scan documents
• ✅ Face ID/Touch ID security
• ✅ Unlimited saved signatures
• ✅ Cloud sync across devices
• ✅ Share via any app

Best For: Professionals needing unlimited mobile signing

Download: iOS App Store | Google Play

2. Adobe Fill & Sign

Platforms: iOS, Android

Price: Free with ads, $15/month ad-free

Rating: 4.6/5

Key Features:

• Works with Adobe ecosystem
• Good for forms
• Camera scan quality
• Adobe Cloud storage

Limitations:

• Requires Adobe account
• Limited to 5 signatures/month on free
• Upsells to full Acrobat

Best For: Existing Adobe users

3. DocuSign Mobile

Platforms: iOS, Android

Price: Viewing free, signing requires $10-45/month plan

Rating: 4.5/5

Key Features:

• Enterprise-grade security
• Deep CRM integrations
• Advanced workflows
• Biometric authentication

Limitations:

• Expensive for individual use
• Complex for simple signing
• No offline mode

Best For: Enterprise users with existing DocuSign accounts

4. PandaDoc Mobile

Platforms: iOS, Android

Price: $35-65/month per user

Rating: 4.4/5

Key Features:

• Great for sales proposals
• Payment collection
• Document analytics
• CRM integration

Limitations:

• Expensive
• Designed for sales teams
• Overkill for simple signing

Best For: Sales teams with PandaDoc already

Comparison Table

How to Sign Documents on iPhone

Method 1: Using SignQuick App (Recommended)

Step 1: Install App

• App Store → "SignQuick"
• Tap Get → Install
• Open app

Step 2: Import Document

Multiple options:

• Camera: Take photo of paper doc
• Files: Select from iCloud/Files
• Email: Import from Mail app
• Photos: Select from photo library
• Scan: Multi-page document scanner

Step 3: Create Signature

First time only:

• Tap "Create Signature"
• Draw: Use finger (or Apple Pencil on iPad)
• Type: Choose font and type name
• Image: Photo of handwritten signature
• Signature saved for future use

Step 4: Place Signature

• Tap saved signature
• Drag to desired position
• Pinch to resize
• Rotate if needed
• Tap checkmark

Step 5: Add Date/Text (optional)

• Tap "Date" to add date field
• Tap "Text" to add custom text
• Position as needed

Step 6: Download & Share

• Tap "Done"
• Choose:
• Download to Files
• Share via Email
• Save to Photos
• Send to other apps
• Print

Total Time: 60-90 seconds

Method 2: Using iOS Markup (Built-in)

Step 1: Open PDF

• In Files, Mail, or Messages

Step 2: Tap Markup

• Tap pen icon or Share → Markup

Step 3: Add Signature

• Tap "+" button
• Select "Signature"
• Draw signature (saved automatically)

Step 4: Position and Save

• Drag signature to position
• Tap "Done"
• Share or save

Pros: Built into iOS, no app needed

Cons: Basic features, less professional, no template support

Method 3: Apple Pencil (iPad)

For Best Results:

• Use iPad with Apple Pencil
• Draw signature naturally
• Most realistic-looking signature
• Pressure sensitivity for line variation

Apps with Apple Pencil Support:

• SignQuick: Full support
• GoodNotes: Good for PDFs
• Notability: Note-taking focus
• PDF Expert: Advanced PDF editing

How to Sign Documents on Android

Method 1: Using SignQuick Android App

Step 1: Install App

• Google Play Store
• Search "SignQuick"
• Install (free)

Step 2: Open Document

• Tap "+" button
• Choose source:
• Camera (scan)
• Gallery
• Google Drive
• Email attachment
• Dropbox/OneDrive

Step 3: Create Signature

• Tap "Add Signature"
• Draw with finger or stylus
• Or upload signature image
• Or type name
• Save signature

Step 4: Sign Document

• Tap to place signature
• Drag to reposition
• Pinch to resize
• Add date if needed

Step 5: Save & Share

• Tap "Finish"
• Download to device
• Or share via:
• Gmail
• WhatsApp
• Drive
• Any installed app

Stylus Support: Works with Samsung S Pen, other active styluses

Method 2: Google Drive Built-in

Step 1: Open PDF in Drive

• Tap PDF file

Step 2: Fill & Sign

• Tap pen icon
• Select signature tool
• Draw signature

Step 3: Save

• Tap save icon
• PDF updated in Drive

Limitations: Basic features only, requires Drive

Mobile Signing Best Practices

For Professional Appearance

1. Use Stylus When Possible

• More natural signature
• Better control
• Looks more authentic
• Recommended styluses:
• Apple Pencil (iPad)
• Samsung S Pen (Galaxy)
• Logitech Crayon
• Generic capacitive stylus

2. Create Signature Once, Reuse

• Spend time creating good signature
• Save it
• Reuse for consistency
• Professional appearance every time

3. Proper Placement

• Sign on signature line if present
• Bottom of page if no line
• Don't cover important text
• Leave space for date

4. Add Date

• Always include date
• Use "MM/DD/YYYY" format (US)
• Or platform auto-date feature

5. Review Before Submitting

• Zoom in to check signature quality
• Verify no fields missed
• Check for typos
• Ensure signature is legible

Security on Mobile

Enable Device Security:

• Face ID / Touch ID
• PIN code minimum
• Auto-lock after 1 minute
• Find My Phone enabled

App-Level Security:

• Biometric authentication for app
• Auto-logout after inactivity
• Encrypted local storage
• Secure cloud sync (TLS 1.3)

Best Practices:

• Don't sign on public WiFi (use cellular)
• Verify document legitimacy before signing
• Keep app updated
• Enable two-factor authentication

Offline Signing

When Offline Mode Matters

• Flights: Sign docs while flying
• Remote Areas: Weak or no connectivity
• International: Avoid roaming charges
• Bandwidth: Slow connections

How Offline Signing Works

SignQuick Offline Mode:

• Download document when online
• Sign while offline
• Changes saved locally
• Auto-syncs when back online
• All parties notified after sync

Other Apps:

• Adobe Fill & Sign: Limited offline
• DocuSign: Requires connection
• Most others: Online-only

Mobile Scanning Tips

Taking Document Photos

Lighting:

• Natural light best
• Avoid shadows
• No glare from overhead lights
• Position phone directly above

Angle:

• Hold phone parallel to document
• Fill frame with document
• Include all edges
• No perspective distortion

Quality Settings:

• Use highest quality
• Enable auto-enhance
• Black & white for text docs
• Color for forms with highlights

Multi-Page Scanning

For contracts/forms with many pages:

SignQuick Scanner:

• Tap "Scan" mode
• Photo of page 1
• Auto-detects edges
• Tap "+" for page 2
• Continue for all pages
• Creates single PDF

Tips:

• Use batch mode for speed
• Reorder pages if needed
• Delete bad scans
• Export as one PDF

Mobile Workflows

Workflow 1: Real Estate Agent

Scenario: Client ready to make offer at property

Mobile Workflow:

• Pull up offer template (saved in app)
• Fill in property address
• Enter offer amount
• Add client name and email
• Send for client signature
• Client signs on their phone
• Agent countersigns
• Submit to listing agent
• All in under 10 minutes

Without Mobile: Return to office, 2-3 hours lost, risk losing property

Workflow 2: Field Service Technician

Scenario: Complete repair, need customer approval

Mobile Workflow:

• Complete work order on phone
• Take photos of completed work
• Generate service report
• Customer signs on technician tablet
• Customer receives copy via email
• Syncs to office system
• Billing auto-triggered

Time Saved: 30 minutes per job

Workflow 3: Sales Rep

Scenario: Close deal at client meeting

Mobile Workflow:

• Review contract on iPad with client
• Answer questions
• Client signs on iPad (Apple Pencil)
• Sales rep countersigns
• Contract emailed to both parties
• CRM automatically updated
• Deal marked "Closed Won"

Without Mobile: Send contract later, risk buyer remorse, delayed close

Troubleshooting Mobile Issues

Problem: Signature Looks Bad

Solutions:

• Use stylus instead of finger
• Draw slowly and smoothly
• Use "type name" option instead
• Upload photo of handwritten signature
• Practice on scrap paper first

Problem: Document Won't Upload

Solutions:

• Check file size (< 25 MB usually)
• Try different file format
• Check internet connection
• Clear app cache
• Reinstall app

Problem: Can't See Signature Fields

Solutions:

• Zoom in on document
• Rotate to landscape mode
• Switch to desktop mode in browser
• Use dedicated app instead of browser

Problem: Signature Too Small/Large

Solutions:

• Use pinch-to-zoom gesture
• Drag corners to resize
• Recreate signature at better size
• Use app with better sizing controls

Mobile vs Desktop: When to Use Each

Use Mobile When:

• ✅ Urgent signing needed immediately
• ✅ Away from computer
• ✅ Simple document (1-5 pages)
• ✅ Single signature required
• ✅ With client in person

Use Desktop When:

• 🖥️ Complex multi-page contracts
• 🖥️ Many fields to fill
• 🖥️ Detailed review required
• 🖥️ Multiple signers to coordinate
• 🖥️ Editing document text needed

Conclusion

Mobile e-signature apps enable signing anywhere in under 2 minutes. SignQuick offers the best balance of features, simplicity, and value with offline mode and unlimited signatures from $10/month.

Download mobile app: iOS | Android

FAQ

What is the best free e-signature app for iPhone?

SignQuick is the best free e-signature app for iPhone, offering 3 free documents per month with offline mode, Apple Pencil support on iPad, and no account required. It processes documents locally on your device for maximum privacy and works with Face ID/Touch ID security.

Can I sign documents on my phone without downloading an app?

Yes. You can use browser-based tools like SignQuick.app directly in Safari or Chrome on your phone. Simply visit the website, upload your PDF, sign, and download. For frequent signing, the dedicated app offers better features like offline mode and saved signatures.

Do mobile e-signatures hold up legally?

Yes. Mobile e-signatures are equally as legally binding as desktop signatures under the ESIGN Act, eIDAS, and equivalent laws worldwide. The signing device does not affect legal validity — what matters is the audit trail, signer authentication, and document integrity.

Can I sign documents offline on my phone?

SignQuick is one of the few mobile e-signature apps that supports full offline signing. Download your document while connected, sign while offline (on a flight, remote area, etc.), and the signed document auto-syncs when you reconnect. Most competitors like DocuSign require an active internet connection.

How do I get a professional-looking signature on a phone screen?

Use a stylus (Apple Pencil on iPad, Samsung S Pen, or any capacitive stylus) for the most natural-looking result. If using your finger, sign with a quick, smooth motion rather than drawing slowly. Alternatively, use the "type name" option with a script font or upload a photo of your handwritten signature.

Related Reading

Explore more resources on electronic signatures:

• [How to Sign a PDF Online](/blog/pdf-signature-online-complete-guide)
• [E-Signature Mistakes to Avoid](/blog/esignature-mistakes-avoid-best-practices)
• [Bulk Send E-Signatures Guide](/blog/bulk-sending-esignatures-mass-documents-guide)
• [Best E-Signature Software 2026](/blog/best-e-signature-software-2026)