Comparison

Private AI vs Foundation

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

Head to head
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+)

About

Foundation

Engage in intelligent, private AI conversations that run entirely on your device. No internet or data collection required, offering instant responses and multiple conversation threads for various tasks.

Highlights
  • 100% on-device AI processing
  • Zero data collection
  • Works offline
  • Multiple conversation threads
  • Clean SwiftUI interface
  • Unlimited chat sessions
Features
Read full description

FoundationChat: Intelligent Conversations, Completely Private Experience AI without compromising your privacy. FoundationChat runs entirely on your iPhone or iPad—no internet required, no data sent to servers. Uses Apple’s on-device Intelligence or Cactus open models. PRIVACY FIRST 100% on-device processing—no ChatGPT, OpenAI, or third-party AI Zero data collection—conversations never leave your device No account, login, or tracking FEATURES Natural conversation powered by on-device AI Context-aware responses Multiple conversation threads Clean SwiftUI interface Works offline with instant responses Unlimited chat sessions REQUIREMENTS iOS 26.0 or later Apple Intelligence: iPhone 15 Pro+, iPhone 16+, or iPad with M1+ (enable in Settings) Cactus: iPhone 13 Pro and other devices with 4GB+ RAM (download a model in-app) WHY FOUNDATIONCHAT? Unlike cloud-based chatbots, FoundationChat keeps everything local. Your questions and conversations stay on your device. Ideal for brainstorming, writing help, learning, and any task where privacy matters. Download FoundationChat for truly private AI conversations.

Screenshots

Private AI4 screens
Foundation3 screens

Verdict

The call

The clearest difference is price: Foundation at Free against Private AI's $4.99. Private AI's advantage is rating (3.5 vs 1.0) and update cadence (every 2 days vs every 4 weeks). On review sentiment, ratings volume, ads and in-app purchases 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

Foundation 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

Private AI holds the better App Store score, 3.5 against 1.0. Both are backed by a comparable volume of ratings — 2 and 1 respectively. Written reviews split almost evenly too, at 0% and 0% positive.

UpkeepUpdate frequency

Private AI ships an update every 2 days, Foundation every 4 weeks. The most recent releases landed on October 6, 2026 and October 16, 2026 respectively.

Scorecard4 real differences · 6 level
Private AI versus Foundation: the parameters behind the verdict, then further details
ParameterPrivate AIFoundation
Price$4.99Free — better
Rating3.5 (2 ratings) — better1.0 (1 ratings)
Positive reviews0.0% of reviews0.0% of reviews
Number of ratings2 — better1
Update frequencyEvery 2 days — betterEvery 4 weeks
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
DevicesiPhone, iPadiPhone, iPad
Requires iOS26.026.0
Further details — not scored
Size6 MB8 MB
Age rating+124+
DeveloperGTechnologies LLCSagar Desai

Customer experience

Private AI

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

Foundation

Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

None

Private AI

No in-app purchases

None

Foundation

No in-app purchases

Questions

Is Private AI free?
Private AI costs $4.99, with no in-app purchases.
Is Foundation free?
Foundation is free to download, with no in-app purchases.
Which has better reviews, Private AI or Foundation?
Private AI is rated higher. Private AI averages 3.5 out of 5 from 2 ratings, while Foundation averages 1.0 from 1 ratings.
Do Private AI or Foundation have ads?
Neither Private AI nor Foundation shows ads.
Which is updated more often, Private AI or Foundation?
Private AI ships an update every 2 days, and Foundation every 4 weeks. Most recently, Private AI was updated on October 6, 2026 and Foundation on October 16, 2026.

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