Loci is a private AI chat app for your iPhone. No account and no subscription. Download a model once and chat anywhere, even in airplane mode.
If you want a ChatGPT alternative that keeps your conversations on your phone, this is it.
NO SETUP, NO JARGON
Loci checks your iPhone and picks a model that runs well on it. You never think about RAM, file sizes, or quantization. Open the app, download once and then start chatting.
PRIVATE BY DESIGN
Your chats, photos, and voice input are processed on your devices. Diagnostic sharing is optional and can be turned off in Settings. Downloaded models work in airplane mode.
REAL MODELS, RUNNING LOCALLY
Chat with well-known open models like Google's Gemma 4, Qwen 3.5, and Llama. Browse more anytime. Loci only offers models your phone can actually run.
LINK TO YOUR MAC OR PC
Run Loci on your Mac or PC too? Pair the two, and your iPhone can use the much larger models your computer runs. The power of a desktop, in your pocket, still on hardware you own.
PHOTOS AND DOCUMENTS
Attach a photo and ask what's in it. Add a PDF, Word file, or EPUB and ask questions about it. Reading happens on device.
TOOLS THAT DO REAL WORK
A calculator that computes instead of guessing. Unit conversions. Reminders and Calendar. Web search when you ask for it. A memory that carries your preferences from chat to chat.
TALK INSTEAD OF TYPING
Tap the waveform and speak. Loci answers out loud and keeps listening. Speech stays on your phone.
MADE FOR THE TASK AT HAND
Focus modes for coding, writing, studying, and brainstorming. Apple Shortcuts for automations. Available in English and Spanish.
EASY ON THE PLANET
Every cloud AI answer runs in a data center. Loci runs on the phone already in your pocket.
Free. Offline. Yours.
Loci is an amazing app! I've been using it for a few weeks now, and it's truly changed the way I learn and research. The app's interface is clean and intuitive, making it easy to navigate and find what I'm looking for. It's also very fast and efficient, saving me a lot of time compared to traditional search engines.One of the things that really sets Loci apart is its ability to provide detailed and accurate information. Whether I'm looking for a specific fact or a comprehensive overview of a topic, Loci delivers exactly what I need. It's also very user-friendly, with a range of tools and features that make it easy to customize my search experience.Another great feature of Loci is its ability to integrate with other apps and platforms. It can sync with my calendar, notes, and other apps, making it easy to stay organized and on top of my tasks. It's also very secure, with a range of features that protect my personal information and data.Overall, I'm extremely satisfied with Loci and would highly recommend it to anyone looking for a reliable and efficient research tool. It's truly a game-changer, and I'm excited to see what the future holds for this amazing app.
Agentic Tools In The Future?
Locally AI User
First of all, Locally is by far the best local AI app I’ve tried on iPhone, and I’ve tried quite a few. The fact that you have web search integrated is just awesome. I don’t know if any of the other big ones are doing that. That said, I was wondering if you ever planned on adding in some agentic usage, for example allowing it to hook up to some model context protocol servers like appdeploy or any of the other big ones that work with ChatGPT and Claude right now. I just think that that would be a really cool feature to have and it makes sense when you have agent (albeit small agentic) models like Gemma 4 E2B on the device. Also it would be very cool in the future if you could add a Qwen Coder model. Overall, this is a great app, and thanks for making it free.
Incredible product
AFL 14
I am incredibly impressed with this app. Having a powerful AI that runs completely offline is a massive game-changer.The biggest selling point for me is the privacy. In a world where every app seems to want your data stored in the cloud, it is so refreshing to know that my conversations, ideas, and data stay entirely on my own device. I can use it with complete peace of mind, whether I'm connected to the internet or completely off the grid.The performance is smooth, the interface is intuitive, and the fact that it doesn't drain my data or rely on a server is fantastic. If you value your privacy and want a reliable, offline AI companion, look no further. Highly recommended
Developer Response
Thank you for your feedback!
Best local AI on IOS
Human653
This is by far the best local ai app on iOS. Other apps just crash after 3 prompts in the same chat. This is the first I found that actually summarizes the conversation while running making it actually capable of processing a decent context. The only thing that could use work is the web search. I haven’t gotten it to work yet but if that was working this could easily replace cloud ai on research projects where I’m looking for very specific information that might require a small amount of thinking.
Bug fixes and improvements.
Version 1.3.27
The developer, Michael Waldman, 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 Linked to You
The following data may be collected and linked to your identity:
Location
Identifiers
Usage Data
Diagnostics
Privacy practices may vary, for example, based on the features you use or your age. Learn More
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More