Comparison

AI Chat PDF vs Sigmy

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

Head to head
About

AI Chat PDF

This app uses AI assistants to help you work with documents, generate summaries, translate text, and even create images. It simplifies workflows for professionals and students by centralizing tasks and optimizing time management.

Highlights
  • Create personalized AI assistants
  • Chat with documents for information access
  • Generate document summaries
  • Translate documents and texts
  • Create AI-generated images
  • Convert files between formats
  • Analyze Excel tables and generate reports
  • Extract text from images
Features
Read full description

AI Chat Bot - Office Assistant Work PDF Doc XLS ChatGPT based AI Chat Bot - Office Assistant is an application designed to improve your productivity by analyzing and manipulating documents, images, and data. Using AI Bots, which are personalized artificial intelligence assistants, you can chat with documents, generate summaries, translate texts... AI Chat Bot - Office Assistant becomes an essential tool for professionals, students, and anyone who needs to work efficiently with information. AI Chat Bot - Office Assistant . Main Features: Creation of AI Bots: Take advantage of artificial intelligence by creating Bots that serve as office assistants to perform any task. Chat with Documents: Analyze and work with your documents through an interactive chat. The AI ​​bot allows quick and easy access to information. Generation of Summaries: Create concise summaries and key points of any document or text, saving time in analysis. Document Translation: Translate texts and entire documents accurately and quickly, maintaining the original format. Generation of Images with AI: Create personalized images using artificial intelligence. AI tool ideal for presentations and marketing material. Document Conversion: Convert your files between different formats (PDF, DOC, XLS, etc.) effortlessly. Excel Table Analysis: Transform Excel data into clear graphs and reports, facilitating decision making. Text Extraction from Images: Convert images into editable text, useful for digitizing printed documents. AI Chat Bot - Office Assistant simplifies your workflow. Thanks to AI Bots assistants you can centralize multiple tasks in a single application. If you are a professional who needs to manage reports, summaries and presentations, this tool will allow you to manage everything from your mobile device, improving the efficiency and accuracy of your daily tasks. In addition, it is ideal for students and academics, as it facilitates the understanding and translation of long texts, as well as the preparation of documents and images with an impeccable format. From the creation of summaries to the conversion of formats, this application adapts to the daily needs of any user looking to optimize their time and resources. Subscription information: - Length of Subscription: 1 week or 1 year. - Price: $8.99 per week billed weekly (first time you subscribe it will be 0.99€ at the first week). $89.99 per year billed yearly. - Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period. - Payment will be charged to iTunes Account at confirmation of purchase. - Account will be charged for renewal within 24-hours prior to the end of the current period, and identify the cost of the renewal. - Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase. - Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable. Privacy Policy: https://offiwiz.com/policy/ Terms of Use: https://offiwiz.com/terms_of_use/

About

Sigmy

Features
Read full description

Sigmy is a fully on-device AI assistant. The language model, document search, and every piece of private text stay on your iPhone or iPad. No cloud. No account. No tracking. No training on your data. Ever. WHY SIGMY IS DIFFERENT • Runs a Google Gemma model locally on your device — no API keys, no subscriptions to external AI services, and no network round-trips that can leak your content. • Works offline, on a plane, in a tunnel, or in a sensitive workplace where cloud AI is banned. • Your documents, chats, and questions never leave your device. We cannot read them and neither can anyone else. WHAT YOU CAN DO • Ask questions about your PDFs, Word docs, text files, Markdown, and scanned images — every answer cites a tappable source passage. • Import documents by tapping +, scanning with the camera, capturing text from photos, pasting images, or sharing from any other app. • Compare two or more documents side-by-side — "what's different between these contracts?", "which proposal has better terms?". • See comparison answers as clean tables when the model formats them that way. • Tap suggested follow-up questions after each answer to dig deeper with one tap. • Extract events from any document straight to your Calendar — meeting dates, deadlines, travel itineraries. • Hands-free mode: have Sigmy read answers aloud in your choice of voice — fully on-device. • Dictate questions by voice and export chats as PDF, Markdown, plain text, RTF, or email. • Search your chat history to find past conversations instantly. • Full-text search across every document you've imported, with semantic ranking that understands what you meant. • Quick-prompt templates for executive summaries, action items, study outlines, and timelines. PRIVACY BY DESIGN • Optional Face ID / Touch ID unlock for the whole app. • Optional AES-GCM encryption of the document index at rest, sealed whenever you background the app. • Privacy manifest declares every iOS API we touch and why. • PII detection warns you before indexing credit card numbers or other sensitive identifiers. FREE TRIAL — 7 DAYS OF EVERYTHING Every new install gets a 7-day free trial with full Pro features: unlimited documents, extended memory window, and all advanced tools. No credit card required. SIGMY PRO After the trial, Sigmy Pro unlocks: • Unlimited document imports and queries • Extended memory window for long files • All advanced tools and future Pro features at no extra cost THREE WAYS TO SUBSCRIBE • Pro Monthly — $5.99/month after a 7-day free trial • Pro Yearly — $39.99/year after a 14-day free trial (saves ~50% vs monthly) • Lifetime Pro — one-time $79.99, permanent access, no renewals SUPPORTED DOCUMENT TYPES PDF, Word (.docx), plain text (.txt), Markdown (.md), Rich Text (.rtf), HTML, CSV, and images containing text (via on-device OCR). DEVICE REQUIREMENTS iPhone or iPad with sufficient RAM for on-device AI. Sigmy adapts memory settings automatically to your device. The language model (~3.4 GB) is included in the app — no separate download after install. Works fully offline once installed. — SUBSCRIPTION TERMS Sigmy Pro is an auto-renewable subscription. • Pro Monthly: $5.99 per month after a 7-day free trial. • Pro Yearly: $39.99 per year after a 14-day free trial. • Lifetime Pro: one-time $79.99 non-renewing purchase. Payment will be charged to your Apple Account at confirmation of purchase. Subscriptions renew automatically unless auto-renew is turned off at least 24 hours before the end of the current period. Your account will be charged for renewal within 24 hours prior to the end of the current period. You can manage and cancel your subscription in Settings → Apple Account → Subscriptions. Privacy Policy: https://www.sigmygroup.com/privacy Terms of Use: https://www.sigmygroup.com/terms

Screenshots

AI Chat PDF4 screens
Sigmy4 screens

Verdict

The call

AI Chat PDF and Sigmy are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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. AI Chat PDF sells 4 in-app purchases, starting at $8.99 per 7 days and Sigmy sells 3 in-app purchases, starting at $5.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 2 weeks. The most recent releases landed on November 4, 2026 and October 31, 2026 respectively.

ScorecardNo meaningful differences
AI Chat PDF versus Sigmy: the parameters behind the verdict, then further details
ParameterAI Chat PDFSigmy
PriceFreeFree
Positive reviews100.0% of reviews—
Update frequencyEvery 2 weeksEvery 2 weeks
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad — betteriPhone
Requires iOS17.217.0 — better
Further details — not scored
Size12 MB3.2 GB
Age rating4+4+
DeveloperOFFIWIZ, S.L.SIGMY GROUP PTY LTD

In-app purchases

4 purchases

AI Chat PDF

Subscriptions4
  • One week Subscription7 Days trial4 variants$8.997 Days
  • One week Subscription$8.997 Days
  • One year subscription4 variants$89.991 Year
Show 1 more
  • One week Subscription$89.991 Year
3 purchases

Sigmy

Subscriptions2
  • Pro Monthly7 Days trial$5.991 Month
  • Pro Yearly14 Days trial$39.991 Year
One-time1
  • Lifetime Pro$79.99

Questions

Is AI Chat PDF free?
AI Chat PDF is free to download, with in-app purchases available.
Is Sigmy free?
Sigmy is free to download, with in-app purchases available.
Do AI Chat PDF or Sigmy have ads?
Neither AI Chat PDF nor Sigmy shows ads.
Which is updated more often, AI Chat PDF or Sigmy?
AI Chat PDF ships an update every 2 weeks, and Sigmy every 2 weeks. Most recently, AI Chat PDF was updated on November 4, 2026 and Sigmy on October 31, 2026.

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