iOS 27: models that run on the Neural Engine and keep writing after you leave the app, plus Apple Private Cloud Compute with no account and no API key.
Privacy AI is both a chatbot and an agent, and both run on your device. Ask it a question, or give it a goal and it will plan, use tools, and come back with a report. Local models work fully offline, and nothing leaves your phone unless you connect a cloud provider yourself.
Run Models Locally or in the Cloud
- On-device GGUF and MLX models, with vision and tool-calling
- New on iOS 27: Neural Engine models keep generating after you leave the app
- Local Decisions: classify and rate text on device, no text generated
- Apple Private Cloud Compute and the on-device Foundation Model, no account or API key
- Apple models read attached pictures; models without vision get an on-device description
- Connect to OpenAI, Claude, Gemini, DeepSeek, or any OpenAI-compatible server
Agent
- Give it a goal and it keeps working across as many turns as that takes
- It plans first, calls tools, keeps its own folder of files, and delivers a written report
- Suited to work that must be broken down: deep research, a multi-leg trip, comparing options
- Teach it with Skills: folders of instructions and scripts it can call by name
Chat
- Set model tiers once (fast, capable, reasoning, local), then just type
- Smart Chat routes each message by complexity and privacy, and keeps sensitive text local
- Switch local and remote models mid-conversation, keeping context
System Keyboard
- Bring Privacy AI into any app: dictate by voice, or rewrite, translate and reshape text in place
- Build named pipelines (Polish then Translate) or use presets like Proofread
- Types in 11 languages with Pinyin, Japanese and Korean input
Mini Apps
- Doc Scanner: turn a PDF, photo or camera scan into clean Markdown, tables and equations intact
- Email Assistant: triage any IMAP inbox on device, with a dated report you can undo
- Knowledge Wiki: a cross-linked knowledge base from your documents, with cited answers
- LLM Council: query several models in parallel and synthesize one answer
- Custom assistants with instructions, an avatar, and a knowledge base
Tools
- 60+ built-in tools: web search, news, calendar, code execution and more
- Full MCP support with a marketplace, Siri and Shortcuts
Writing and Voice
- Long-form writing assistant that drafts outlines and chapters
- Text to Audio: turn a document into a single audio file using on-device voices
- Real-time voice chat and live transcription
Files and Content
- Convert PDFs, Office files, EPUB, video and audio to Markdown, with OCR
- Media Studio: generate images with your provider
Accessibility
- VoiceOver support, sound and haptic feedback, Verbose Announcements
- View Assistant: point the camera and hear what is in front of you
Free to Use. No Ads.
Local model features are free, including the AI keyboard, knowledge wiki, writing assistant, custom assistants, 60+ tools, document reader, and image generation. Cloud API models and the MCP marketplace need a subscription.
Privacy by Design
Privacy AI runs on-device. No backend servers. No accounts. No data collection. Every API request is visible in the Protocol Inspector.
Your models. Your device. Your data.
Terms of Use: https://privacyai.acmeup.com/docs/policy/tos.html
Privacy Policy: https://privacyai.acmeup.com/docs/policy/privacy.html
I've tried just about every AI client on the App Store, and this is the one. I stumbled on this app when it had zero downloads and found an absolute gem. This isn't just another chat wrapper; it's a full-on AI agent for your phone. You can plug in APIs for basically any model (Gemini, DeepSeek, etc.) and it has tools that let the AI actually do things—manage your calendar, get directions, search your contacts, the list goes on. The "Super Siri" feature that lets you use your own AI model with a voice command is a complete game-changer.Now, full disclosure, the app is BRAND new, so it's a little rough around the edges. You might hit a few quirks or a random crash here and there as the developer irons things out. But honestly, that's totally expected for something this ambitious. The potential here is just off the charts.Giving this 5 stars for the vision alone and for what it can already do.
Developer Response
Thank you for trying Privacy AI when it only had a few downloads. It means a lot that you see what we’re building, not just another chat app, but a full AI workspace and agent for mobile devices. We’re glad you tried features like broad API support and the “Super Siri” voice command. Both are designed to put you in control of your AI on your own terms. Our philosophy is simple: AI should run under users’ control, free from Big Tech lock-in, and work exactly the way users need it to. The app is still new and not perfect. But we’re shipping fast and improving every week. Thank you for the five stars and for recognizing the vision. Reviews like yours help more people discover Privacy AI and motivate us to make it even better.
Hands down one of the best iOS harness/inference clients.
D. Grimhood
Top two alongside Minis. You really can’t ask for more when it comes to running AI on iOS, and the development team is constantly pushing newer and newer updates on a regular basis. Just when you think it couldn’t possibly get better, they outdo themselves yet again.Now this is how app development SHOULD be like. Major respect to the team, and thank you. Infinitely appreciated.
Developer Response
Thank you so much for this. This kind of message is what makes the work worth it.It means a great deal to hear that the regular updates are landing well. My goal has always been to make running AI on iOS feel simple and private, and to keep improving it with every release.I have plenty more planned, and reviews like yours are exactly what keeps the momentum going. If you ever run into something you would like to see improved or added, I would love to hear it.Thank you again for the kind words and the support.
Right direction
justplayingstartrek
**Edited: Dev responded positively and implemented fix right away, 5* Overall, I think this is on the right track, though one obvious problem is the text-to-speech feature... what's called "File TTS" isn't actually text to speech.... it's ASR/STT. That label should be corrected.On top of that, there's already a way to input text and preview how it sounds using the TTS models, so I don't understand why that same option isn't available for other text I'd want converted.Paying an API provider to run some massive model makes no sense to me when my own device has plenty of processing power for the job, and the drop in quality would be perfectly tolerable.
Developer Response
Thanks for the honest review, and you are completely right about that label. That tab is for file transcription, so it is ASR, not text to speech. Calling it "File TTS" was my mistake. It is now "File ASR" and the fix is in the next update.Your second point is a fair hit, and the credit is yours: I had not thought of it. You were right that it made no sense for the local voices to work in the preview box with no way to point them at anything else. The pieces turned out to be mostly there already and just needed wiring together, so I built it. There is now a "Text to Audio" feature that turns any text or document into an audio file using the speech models already on your device, processed in chunks so a long article or a book chapter works fine, and you can resume one you stopped partway. It ships in the next update.I agree with you on the last point. The phone has plenty of power for this job, the local voices sound good enough, and nothing needs to leave the device or cost anything to run. Thanks for taking the time to write this up.
Better than I expected
AppleLake7195
Good app for asking weird questions no other AI would ever answer. Completely private and after you download the models you need it work even offline.Only thing you have to know is that it uses up a lot of your devices resources.
Developer Response
Thank you so much for the five-star review! It really means a lot.You are absolutely right about the local resources. Local models are large files and they do take up significant storage space on your device. That is the trade-off for having full privacy and the ability to work completely offline.I am planning to add an option to offload models from iCloud Drive to local drive in a future release. This will give you more flexibility in managing your storage.Thanks again for your kind words and support!
This update makes model downloads dependable: start one, close the app, and it is still there when you come back.
IMPROVEMENTS
- Downloads Survive Closing the App
Model downloads now pick up where they left off after the app is closed. When you reopen it, the screen that started the download shows its progress and Cancel button again, and the model is set up as soon as the download finishes.
- Resume After Swiping the App Away
A model download stopped by swiping the app away in the app switcher now continues from where it stopped with one tap on Resume. The import button in My Models reads Resume Download with the model's name and opens the paused download.
BUG FIXES
- Download Live Activity Stays Visible
The download progress on the Lock Screen and in the Dynamic Island now stays up after the app is reopened, instead of disappearing while the download keeps running.
- Hugging Face Imports Finish Reliably
A model downloaded from Hugging Face is now added to My Models even if the app was closed during the download.
- Retrying Audio and Image Downloads
Retrying an MLX audio or image model download no longer deletes a download that had already finished.
- Partial Whisper Downloads
A Whisper model that only partly downloaded no longer shows as Downloaded. It now offers to continue the download instead.
Version 3.2.1
The developer, AcmeUp Inc., indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
Identifiers
Usage Data
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
Identifiers
Usage Data
Privacy practices may vary, for example, based on the features you use or your age. Learn More
The developer indicated that this app supports the following accessibility features. Learn More
Supported Features
Larger Text
Dark Interface
Differentiate Without Color Alone
Sufficient Contrast
Information
Seller
AcmeUp Inc.
Size
3.6 GB
Category
Productivity
Compatibility
Requires iOS 18.0 or later.
iPhone Requires iOS 18.0 or later.
iPad Requires iPadOS 18.0 or later.
Mac Requires macOS 15.0 or later and a Mac with Apple M1 chip or later.
Apple Vision Requires visionOS 2.0 or later.
Languages
English and 11 more
English, French, German, Italian, Japanese, Korean, Portuguese, Russian, Simplified Chinese, Spanish, Swedish, Traditional Chinese