Comparison

NetPDF vs Private AI

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

Head to head
About

NetPDF

This AI-powered PDF reader and editor allows users to read, annotate, edit, and summarize documents directly on their device. It offers on-device privacy for all AI features, ensuring no document data is sent externally. Enjoy smart search, text-to-speech, and seamless organization.

Highlights
  • On-device AI summarization and Q&A
  • Touch-first PDF reading and annotation
  • High-fidelity PDF rendering and editing
  • Integrated Text-to-Speech
  • Smart search and navigation
  • Offline operation for all features
Features
Read full description

NetPDF helps you explore PDFs through conversation. Ask questions about a document, find relevant information, request explanations, perform calculations, or continue the discussion with follow-up questions. ### Ask Your PDF NetPDF can help you: • Ask questions about document content • Find relevant passages • Explore specific pages • Summarize or explain information • Ask follow-up questions • Perform calculations • Discuss related topics ### Improved Document Intelligence NetPDF 2.0 significantly improves how information is located and supplied to the AI. Document search is handled separately from answer generation so the AI can focus on the passages most relevant to your question. This approach also improves performance when repeatedly asking questions about the same document. ### Better Conversations You are no longer limited to rigid document commands. NetPDF can maintain more conversational context, making follow-up questions and general discussion more natural while continuing to prioritize relevant document information. ### On-Device AI Many AI features are designed to run directly on your device. Required AI resources may be downloaded after installation, keeping the initial app download smaller. Model availability and performance vary depending on device capabilities and available resources. ### Useful Built-In Tools NetPDF includes tools for tasks such as: • Searching document content • Reading relevant pages • Performing calculations • Supplementing a question with online information when enabled Online lookup is optional and requires an internet connection. Information necessary to perform an online request may be sent to external services when that feature is used. ### You Control Online Access From the chat controls, you can choose whether NetPDF can: • Use document tools • Look up information online ### See What's Available NetPDF includes a diagnostic report showing the AI and tools currently available on your device. ### Built for Reliability NetPDF 2.0 includes major improvements to document processing, conversation quality, AI reliability, memory handling, speech interaction, and overall performance. AI-generated answers may occasionally be incomplete or incorrect. For important information, verify the answer against the original document and cited or referenced passages.

About

Private AI

This AI assistant operates entirely offline on your device, ensuring 100% data privacy. It allows you to chat with your documents using specialized AI experts and custom prompts, without any internet connection or data uploads.

Highlights
  • 100% private and offline operation
  • Chat with PDFs, code, spreadsheets, and more
  • 25 specialized AI experts and custom prompts
  • No subscriptions or in-app purchases
  • Leverages Apple Intelligence models
  • Zero tracking and zero data uploads
Features
Read full description

Transform how you work with information using Private AI: Document Chat, the AI assistant that keeps 100% of your data private on your device. No internet required. No data uploaded. Ever. 100% PRIVATE & OFFLINE Your conversations, documents, and data stay on YOUR device. Forever. Unlike ChatGPT, Gemini, Claude, or other cloud AI services, Private AI uses Apple's built-in Intelligence models for completely offline, lightning fast responses. Zero tracking. Zero uploads. Zero compromises. Perfect for confidential, sensitive, or personal use. NO HIDDEN COSTS No subscriptions. No in-app purchases. No "premium" features locked behind paywalls. Buy once, use forever. POWERED BY APPLE INTELLIGENCE Built exclusively for iPhone 15 Pro+, iPad M1+, and Mac with Apple Silicon. No large, external vendor model downloads eating your storage - Private AI leverages the powerful AI models already in your device from Apple. Fast, efficient, and always ready. CHAT WITH YOUR DOCUMENTS Upload PDFs, code files, spreadsheets, notes, research papers, meeting transcripts, word documents, and more. With any text-based file, you can ask questions, get summaries, extract insights, analyze data, and more using advanced RAG (Retrieval Augmented Generation) technology. Your personal document library becomes instantly searchable and queryable. 25 SPECIALIZED AI EXPERTS READY TO USE No prompt engineering needed. Just pick your expert: • Study & Learn: Teacher, Summarizer, Simplifier • Coding: Code Expert, Debugger, Technical Writer • Writing: Creative Writer, ReWriter, Spell Checker, Poet, Story Teller • Business: Analyst, Marketer, Meeting Notes, Recruiter, Planner • Creative: Brainstormer, Social Media, Guide Creator, Motivator • Utility: Translator, Pros & Cons, Follow Ups, Concise Mode Plus, create unlimited custom prompts for your specific needs! VS CHATGPT, CLAUDE, GEMINI, & OTHERS They require internet & upload your data → Private AI is 100% offline They charge monthly subscriptions forever → Private AI is yours (one-time purchase) They track your usage & conversations → Private AI has zero analytics, zero tracking They can't guarantee where your data goes → Private AI your data never leaves your device WHO IS THIS FOR? • Students - Study aids, research analysis, essay help, exam prep • Professionals - Confidential docs, reports, presentations, meeting notes • Developers - Code review, debugging, documentation, architecture planning • Writers - Brainstorming, editing, storytelling, content creation • Researchers - Paper analysis, data insights, literature review Anyone who values privacy and wants to leverage AI with sensitive information that absolutely does not belong in the cloud. POWERFUL FEATURES • Multiple isolated conversations - keep contexts separate • Document library - reuse files across chats • Beautiful themes - customize every color • Smart search - find conversations and documents instantly • Markdown support - beautifully formatted responses • No ads, ever - you own the app, not the other way around HOW DOES IT WORK? Private AI uses Apple's Foundation Models that are already on compatible devices. When you upload a document, it's split into intelligent chunks and converted to vector embeddings (mathematical representations of meaning) stored in a local database. When you ask questions, our RAG system finds the most relevant chunks and provides them as context to the AI model alongside your query. The model generates responses using both the retrieved information and its built-in knowledge - all processed locally on your device's Neural Engine. No internet. No APIs. No cloud processing. Just pure, private, on-device AI. Your knowledge. Your privacy. Your control. Download Private AI: Document Chat and experience truly private AI assistance today. REQUIREMENTS: • iOS26 • iPhone 15 Pro or iPhone 16+ models • iPad mini (A17 Pro) or iPad with M1+ • Mac with Apple Silicon (M1+)

Screenshots

NetPDF2 screens
Private AI4 screens

Verdict

The call

The clearest difference is review sentiment: NetPDF at 100% against Private AI's 0%. NetPDF also leads on price (Free vs $4.99) and rating (5.0 vs 3.5). Private AI's advantage is ads (none vs shown) and update cadence (every 2 days vs every 2 months). On ratings volume, 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

NetPDF is free to download; Private AI costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

NetPDF holds the better App Store score, 5.0 against 3.5. Both are backed by a comparable volume of ratings — 1 and 2 respectively. Written reviews point the same way: 100% of NetPDF's written reviews are positive against 0% of Private AI's.

UpkeepUpdate frequency

NetPDF ships an update every 2 months, Private AI every 2 days. The most recent releases landed on October 10, 2026 and October 6, 2026 respectively.

Scorecard7 real differences · 3 level
NetPDF versus Private AI: the parameters behind the verdict, then further details
ParameterNetPDFPrivate AI
PriceFree — better$4.99
Rating5.0 (1 ratings) — better3.5 (2 ratings)
Positive reviews100.0% of reviews — better0.0% of reviews
Number of ratings12 — better
Update frequencyEvery 2 monthsEvery 2 days — better
AdsYesNo — better
In-app purchasesNoNo
MonetizationAd-supported — betterPaid
DevicesiPhone, iPadiPhone, iPad
Requires iOS18.2 — better26.0
Further details — not scored
Size1.1 GB6 MB
Age rating4++12
DeveloperDeep Simplicity LLCGTechnologies LLC

Customer experience

NetPDF

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Private AI

All ratings2 ratings
Positive50.0%
Neutral0.0%
Negative50.0%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

None

NetPDF

No in-app purchases

None

Private AI

No in-app purchases

Questions

Is NetPDF free?
NetPDF is free to download, with no in-app purchases.
Is Private AI free?
Private AI costs $4.99, with no in-app purchases.
Which has better reviews, NetPDF or Private AI?
NetPDF is rated higher. NetPDF averages 5.0 out of 5 from 1 ratings, while Private AI averages 3.5 from 2 ratings.
Do NetPDF or Private AI have ads?
NetPDF shows ads; Private AI does not.
Which is updated more often, NetPDF or Private AI?
NetPDF ships an update every 2 months, and Private AI every 2 days. Most recently, NetPDF was updated on October 10, 2026 and Private AI on October 6, 2026.

Other comparisons