ChatWithAnyone is a lightweight, free, iOS-exclusive app that runs powerful AI assistants directly on your iPhone, keeping every conversation 100% private and offline.
It uses Apple’s on-device LLM (large language model) to let you chat with AI assistants, create custom personalities for role-playing, practice languages, or get feedback on your writing without needing an internet connection. The entire experience is fast, secure, and self-contained within your phone.
Features
- 100% On-Device AI: All processing happens locally on your iPhone or iPad. Your conversations are never sent to the cloud.
- Works Entirely Offline: Since it doesn’t rely on external servers, you can use the app anywhere, anytime, even in airplane mode.
- Specialized AI Personas: The app includes four purpose-built models: a personality for general chat, a language coach, a historical/fictional role-player, and an editor for writing assistance.
- Custom Character Creation: You can design your own AI chat partners by defining their name, personality, backstory, and even their speaking style for consistent and believable interactions.
- Global Language Coach: Practice conversations in various languages and dialects with corrective feedback and cultural context, all offline.
- Private Writing Editor: Get proofreading, copyediting, or structural feedback on your drafts without your text ever leaving your device.
- Lightweight and Efficient: The app is under 20 MB, making for a quick download and minimal impact on your device’s storage and battery life.
- No Accounts or Subscriptions Required: You can download the app and start chatting without signing up for anything. A freemium model offers one new persona per day, with an optional upgrade for unlimited creation.
Use Cases
- Private Brainstorming: Create a custom persona of an expert in a specific field to bounce ideas off of without sharing proprietary information with a cloud-based AI.
- Language Practice While Traveling: Use the Global Language Coach on a long flight to practice Spanish with a guide from Mexico City or Japanese with a pen pal from Tokyo, all without needing Wi-Fi.
- Creative Writing and Role-Play: Develop dialogue for a story by chatting with a character you created. Or, use the “Echoes of Time” persona to explore historical scenarios for a school project.
- Confidential Document Editing: Polish a sensitive report, a personal journal entry, or a business proposal using the “Editor-in-Residence” knowing the content remains securely on your device.
- Entertainment in Dead Zones: Chat with an interesting AI personality during your commute on the subway or while camping in a remote area with no cell service.
How to Use It
1. Get the ChatWithAnyone app from the App Store. It requires iOS 26 or later.
2. Once you open the app, you’ll see the Model Selector. You can pick one of the four pre-built AI models like the Language Coach or Editor-in-Residence.
3. To create a custom character, you’ll define its core traits: name, age, personality (e.g., sarcastic, thoughtful), and a brief backstory. The app uses this information to make the AI’s responses feel consistent.
4. You can now start chatting with the character. Simply type your message and hit send. The response is generated locally and appears in seconds.
5. You can easily swap between different personas depending on your task. All conversations are saved on your device until you decide to delete them.
Pros
- Ultimate Privacy: Your data stays on your device. Period. No accounts, no tracking, no data sharing.
- No Internet Required: It’s a reliable tool for travel, remote locations, or anywhere with spotty connectivity.
- Instant Responses: On-device processing means replies are fast, which keeps the conversation flowing naturally.
- Extremely Lightweight: At under 20 MB, it won’t consume your phone’s storage.
Cons
- iOS 26+ Exclusive: The app is only available for newer Apple operating systems, so users with older devices can’t access it.
- Limited Power: On-device models are inherently smaller and less powerful than massive, cloud-based systems like GPT-5. The AI can be wrong or incomplete.
- Freemium Limitations: The free version limits you to creating one new persona per day. Unlimited creation requires a Pro upgrade.
- Content restrictions: Safety filters may limit certain types of creative or historical conversations.
FAQs
Q: How can the AI work without an internet connection?
A: The app uses large language models that are built directly into its code and run using your iPhone’s processor (Apple Silicon and the Neural Engine). All the “thinking” happens locally, not on a remote server.
Q: Is my data really 100% private?
A: Yes. Because the AI runs on-device, your conversations and any text you input never leave your phone. The developer has no access to it, and there are no accounts or cloud backups to track.
Q: Can I use this for professional translation work?
A: While useful for practice and assistance, the app isn’t designed for professional translation accuracy. It’s better suited for learning and casual use.
Q: How does the language correction work?
A: The AI identifies errors in your target language and provides gentle corrections within the natural flow of conversation, similar to how a language partner might help.
Q: Are there any hidden costs after download?
A: The free version includes unlimited messaging with existing personas. You only pay if you want unlimited persona creation through the Pro upgrade.
Q: What happens to my data if I delete the app?
A: All conversations and personas are stored locally on your device. Uninstalling the app permanently removes all your data—there’s no cloud backup or recovery.
