Comparison

Fill and Sign Documents vs Chat AI·Question, Smart Answer

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

Head to head
About

Fill and Sign Documents

This app allows users to fill out, sign, and manage PDF documents digitally. It supports creating electronic signatures, requesting signatures from others, and securely storing signed contracts with audit trails. Users can also scan documents and convert them into editable digital files.

Highlights
  • Fill PDF forms
  • Create digital signatures
  • Request e-signatures
  • Annotate and stamp PDFs
  • Scan and convert documents
  • Secure document management
  • Audit trails for contracts
Features
Read full description

Stop printing, scanning, and chasing down signatures. Trusted by 2 million+ users, Fill turns your iPhone / iPad into a complete PDF and signature workspace - fill out any form, eSign PDFs, assign fields to multiple signers, track audit trail live, convert file formats and send legally binding agreements in just 3 taps. ESIGN DOCUMENTS - LEGALLY BINDING, ANYWHERE Create a secure digital signature and sign documents wherever you are. eSign PDF, contracts, agreements and forms - legally binding and court-admissible • Draw, type or upload your signature • Store and reuse signature across documents • Keep paperwork moving without printing or scanning • Full audit trail for legal compliance and traceability FILL OUT FORMS IN MINUTES Complete forms digitally without printing paperwork. Add text, checkboxes, dates, initials and signatures directly to your documents. • Fill out tax forms: 1040, W-9, W-4, and more • Complete rental agreements, lease forms, and real estate files • Finish university or job applications, registration forms and medical paperwork • Choose from pre-built templates - fill, sign and share immediately • Reuse saved information across multiple documents ASSIGN FIELDS & COLLECT SIGNATURES FROM MULTIPLE SIGNERS Send one document to multiple people and assign exactly who fills what and where. Watch progress live as each person completes their part. No chasing, no confusion, no follow-up emails! • Assign specific form fields and signature blocks to each signer so that no one sign in the wrong place • Send to clients, employees, partners, or teams in one go • Track live progress of who has filled, signed, or is still pending • Manage multi-party agreements, contracts and onboarding docs from one place PDF EDITOR FOR EVERYDAY DOCUMENTS Edit, annotate and prepare documents before sharing or adding esign, no desktop needed. • Add text, annotations, highlights, stamps and comments • Merge, split, reorder and add pages to any PDF SCAN DOCUMENTS WITH YOUR CAMERA Turn paper documents into digital files instantly, no separate scanner app needed. Scan documents on the go to fill, edit or signing them digitally. • Scan receipts, forms, contracts and multipage documents • Auto-detect document edges for clean, straight results CONVERT FILES TO PDF Convert any file into PDF for easier signing and editing. Export completed PDF in any file format you need. • Convert JPG, PNG and other images to PDF • Export completed forms in multiple file format • Import & export via Google Drive, Dropbox, iCloud and email SECURE, COMPLIANT & PAPERLESS Fill helps individuals and businesses manage documents securely while reducing paperwork. • 256-bit AES military-grade encryption on every file • Full esign records and audit history for every document • GDPR, HIPAA and GLBA compliant, built for regulated industries • Legally recognised eSignature • Secure document storage and sharing from anywhere WHO USES FILL? • HR teams handling onboarding documents • Real estate agents processing lease agreements • Freelancers sending proposals • Small businesses managing approvals & multi-party agreements • Professionals signing contracts or agreements • Students completing applications & registration forms • Anyone who needs to fill, sign and send documents without printing HOW IT WORKS? 1. Import or scan a document 2. Fill forms, assign fields and prepare the file 3. Add your sign or request signatures from others 4. Collaborate with multiple signers when needed 5. Share, download or save completed documents Download Fill - start your 7 day free trial. The easiest way to fill forms, eSign doc, assign fields to multiple signers, track live progress, edit PDF, scan paperwork & convert files, all from one secure app on your iPhone / iPad. Subscribe for full access to all premium features. Subscriptions automatically renew unless auto-renewal is turned off at least 24 hours before the end of subscription period. Terms - https://www.fillhq.com/terms

About

Chat AI·Question, Smart Answer

This AI assistant offers advanced conversational capabilities powered by multiple leading AI models. It assists with writing, learning, problem-solving, and creative tasks, providing tailored interactions for maximum productivity and creativity.

Highlights
  • Choose preferred AI models (GPT-5, Claude 3.5, Gemini Pro)
  • Personalized writing assistant for emails, articles, and more
  • Integrated search engine for up-to-date information
  • Educational tools and homework help
  • Social media content generation
  • Roleplay and engaging conversations
  • Creative content generation (lyrics, poems, visuals)
Features
Read full description

Your intelligent, powerful, and customizable AI assistant! Chat AI leverages the most advanced technologies, such as GPT-5, Claude 3, Gemini 1.5, Perplexity, and more, to provide unique and tailored interactions to suit your needs. Whether you’re looking to write, learn, solve a problem, or simply chat, Chat AI is the ultimate solution to maximize your productivity and creativity. EXCLUSIVE FEATURE: CHOOSE YOUR PREFERRED AI MODEL With Chat AI, you have total control over your experience. Select the AI model that best suits your needs from a diverse range: - GPT-5: Perfect for quick and lightweight responses. - Claude 3.5 Sonnet: Specialized in poetry, creativity, and complex texts. - Gemini Pro 1.5: Designed for a deep understanding of contexts and advanced topics. - LlaMa 3.1: An efficient model for detailed and technical responses. - Command R+: Ideal for queries requiring in-depth research. - Mistral Nemo: Delivers fast and accurate results in a compact format. PERSONALIZED WRITING ASSISTANT - Write impactful emails, articles, poems, resumes, cover letters, or even tweets. - Choose the tone, style, and complexity of your texts. - Quickly correct your writing in just seconds. INTEGRATED SEARCH ENGINE - Get precise and up-to-date information using AI models. - Find answers to your questions or explore the latest trends. EDUCATIONAL TOOLS AND HOMEWORK HELP - Solve mathematical equations and complex problems. - Write structured essays or create study plans. - Check grammar and spelling in your texts. - Receive detailed explanations to understand complex concepts. SOCIAL MEDIA BOOSTER - Generate captivating captions for Instagram, TikTok, or LinkedIn. - Write optimized posts to engage your followers. - Add unique descriptions to your reels or videos. ROLEPLAY AND CONVERSATIONS - Chat with AI in various roles to make your interactions more engaging. - Receive emotional support or enjoy a fun and humorous conversation. CREATIVITY AND ENTERTAINMENT - Create song lyrics, poems, or even recipes. - Transform your ideas into stunning visuals with our AI generator. - Plan fun activities with your friends or organize unique gatherings. PRODUCTIVITY AND WORK - Write job descriptions, resumes, or impactful emails. - Get a list of key points from a text or compile a comprehensive FAQ. - Define your company’s core values. BUSINESS IDEAS - Receive ideas for startups and innovative products. - Combine concepts to create new business opportunities. - Design ad campaigns or promotional video concepts. PERSONALIZATION AND LIFESTYLE - Discover music tailored to your preferences. - Interpret tarot card readings or create personalized playlists. SUBSCRIPTION DETAILS Subscription payments will be charged to your App Store account upon confirmation of your purchase. Subscriptions will automatically renew, and you will be charged unless you disable automatic renewal or cancel the subscription at least 24 hours before the end of the current trial or subscription period. Any unused portion of a free trial period will be forfeited if you purchase a premium subscription during that free trial period. The cost of renewal depends on the subscription package you choose. Subscriptions and auto-renewal can be managed by going to account settings after purchase. Privacy Policy: https://www.iubenda.com/privacy-policy/84832400 Terms and Conditions: https://www.iubenda.com/terms-and-conditions/44220384

Screenshots

Fill and Sign Documents4 screens
Chat AI·Question, Smart Answer4 screens

Verdict

The call

The clearest difference is review sentiment: Chat AI·Question, Smart Answer at 65% against Fill and Sign Documents's 24%. Chat AI·Question, Smart Answer also leads on rating (4.6 vs 4.3) and update cadence (every 9 days vs every 3 weeks). Fill and Sign Documents's advantage is chart position (#199 vs unranked) and ratings volume (4.9K vs 942). On price, ads, in-app purchases and monetization model 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. Fill and Sign Documents sells 20 in-app purchases, starting at $1.99 per month and Chat AI·Question, Smart Answer sells 14 in-app purchases, starting at $6.99 per 7 days. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Chat AI·Question, Smart Answer holds the better App Store score, 4.6 against 4.3. That said, the two scores are not equally well evidenced: Fill and Sign Documents has 4.9K ratings behind it against 942, so its average is the more settled of the two. Written reviews point the same way: 24% of Fill and Sign Documents's written reviews are positive against 65% of Chat AI·Question, Smart Answer's.

UpkeepUpdate frequency

Fill and Sign Documents ships an update every 3 weeks, Chat AI·Question, Smart Answer every 9 days. The most recent releases landed on September 22, 2026 and September 24, 2026 respectively.

Scorecard5 real differences · 6 level
Fill and Sign Documents versus Chat AI·Question, Smart Answer: the parameters behind the verdict, then further details
ParameterFill and Sign DocumentsChat AI·Question, Smart Answer
PriceFreeFree
Rating4.3 (4.9K ratings)4.6 (942 ratings) — better
Positive reviews24.5% of reviews65.3% of reviews — better
Number of ratings4.9K — better942
Update frequencyEvery 3 weeksEvery 9 days — better
AdsYesYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
Best chart rank#199 — better
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.017.0
Further details — not scored
Size101 MB309 MB
Age rating4+4+
DeveloperCrowded RoadKrobe.net

Customer experience

Fill and Sign Documents

All ratings4,885 ratings
Positive81.6%
Neutral1.8%
Negative16.5%
Written reviews282 reviews
Positive24.5%
Neutral2.5%
Negative73.0%

Chat AI·Question, Smart Answer

All ratings942 ratings
Positive88.7%
Neutral4.7%
Negative6.6%
Written reviews49 reviews
Positive65.3%
Neutral6.1%
Negative28.6%

User reviews

Fill and Sign Documents

From 4.9K App Store ratings

What we love

  • ⭐ Excellent app
  • 🚀 Easy to use interface
  • 📝 Helpful editing tools
  • 🔍 Useful for students and professionals

Room to improve

  • 🔒 Difficult to cancel subscription
  • 💰 Expensive subscription model
  • 🐛 Buggy and unreliable
  • 📤 Issues with exporting/sharing documents

Chat AI·Question, Smart Answer

From 942 App Store ratings

What we love

  • 👍 Helpful AI assistant
  • 🚀 Fast and responsive
  • 💡 Wide range of features
  • 🤖 Powerful language models
  • 🤩 Impressive capabilities

Room to improve

  • 🔒 Subscription-based model
  • 🔒 Limited access without premium
  • 🐛 Inconsistent performance
  • 🤔 Confusing or unclear features
  • 😡 Deceptive marketing practices

Bugs and requests

Fill and Sign Documents

Reported bugs

4 issues
  • App crashes frequently
  • Text formatting issues
  • Signature feature not working as expected
  • Subscription charges despite cancellation attempts

Requested features

4 requests
  • Improve subscription cancellation process
  • Offer more affordable pricing options
  • Fix bugs and improve overall stability
  • Enhance document export and sharing capabilities

Chat AI·Question, Smart Answer

Reported bugs

4 issues
  • Unauthorized charges
  • Inability to change language
  • High capacity errors
  • Freezing and crashing issues

Requested features

5 requests
  • Ability to add attachments
  • Continuous conversation history
  • Copy message functionality
  • Image and audio generation
  • Multilingual support

In-app purchases

20 purchases

Fill and Sign Documents

Subscriptions18
  • Fill Plan - Free for 7 days7 Days trial$1.991 Month
  • Unlimited Export Credits7 Days trial$4.991 Month
  • Fill and Sign PDF Expert$4.997 Days
Show 15 more
  • Unlimited Export Credits7 Days trial$9.991 Month
  • Fill, Edit and eSign PDF Form$9.991 Month
  • Fill, Edit and eSign PDF Form7 Days trial$9.991 Month
  • Fill Plan - Free for 7 days7 Days trial$14.991 Month
  • Unlimited Plan$14.991 Month
  • Fill, Edit and eSign PDF Form7 Days trial2 variants$14.991 Month
  • Fill, Edit and eSign PDF Form$14.991 Month
  • Fill Pro: eSign, PDF Expert7 Days trial$19.991 Month
  • Fill and Sign Now: PDF Editor7 Days trial$59.991 Year
  • Fill Plan - Free for 7 days7 Days trial$74.991 Year
  • Fill and Sign Now: PDF Filler7 Days trial2 variants$79.991 Year
  • Fill and Sign Now: PDF Expert7 Days trial$99.991 Year
  • Fill and Sign Plus: PDF Editor7 Days trial$119.991 Year
  • Unlimited Plan$119.991 Year
  • Fill and Sign Pro: PDF Editor7 Days trial$119.991 Year
One-time2
  • Fill Plus: Edit PDF & Sign Now$0.99
  • Fill Doc: eSign, PDF Expert$2.99
14 purchases

Chat AI·Question, Smart Answer

Subscriptions14
  • Premium$6.997 Days
  • Premium7 Days trial$6.997 Days
  • Premium3 Days trial$6.997 Days
Show 11 more
  • Premium3 Days trial$7.997 Days
  • Premium Weekly3 Days trial$7.997 Days
  • Premium weekly with discount7 Days trial$9.997 Days
  • Premium monthly with discount1 Month trial$19.991 Month
  • Premium Monthly$19.991 Month
  • Premium$34.991 Year
  • Premium$39.991 Year
  • Premium Yearly$49.991 Year
  • Premium yearly with discount1 Year trial$69.991 Year
  • Premium$79.991 Year
  • Premium$99.991 Year

Questions

Is Fill and Sign Documents free?
Fill and Sign Documents is free to download, with in-app purchases available.
Is Chat AI·Question, Smart Answer free?
Chat AI·Question, Smart Answer is free to download, with in-app purchases available.
Which has better reviews, Fill and Sign Documents or Chat AI·Question, Smart Answer?
Chat AI·Question, Smart Answer is rated higher. Fill and Sign Documents averages 4.3 out of 5 from 4.9K ratings, while Chat AI·Question, Smart Answer averages 4.6 from 942 ratings.
Do Fill and Sign Documents or Chat AI·Question, Smart Answer have ads?
Both Fill and Sign Documents and Chat AI·Question, Smart Answer show ads.
Which is updated more often, Fill and Sign Documents or Chat AI·Question, Smart Answer?
Fill and Sign Documents ships an update every 3 weeks, and Chat AI·Question, Smart Answer every 9 days. Most recently, Fill and Sign Documents was updated on September 22, 2026 and Chat AI·Question, Smart Answer on September 24, 2026.

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