Chiko - Local AI Hub

An offline AI app developed in Japan, with Japanese in mind.
Download a compatible model, then chat offline.
Chiko is an on-device AI hub created by a Japanese developer for Japanese-speaking users, with both Japanese and English interfaces. Choose a model for everyday questions and writing without sending your local chats to a cloud AI service.

CHAT ON YOUR DEVICE
Local chat responses are generated on your phone. Your prompts and answers are not sent to external AI services for inference. Once a compatible model is downloaded, local chat works offline. Organize your thoughts and draft personal messages without relying on cloud AI processing.

PROTECT STORED CONVERSATIONS
Chat history and document knowledge are stored in an encrypted database on your device. The key is managed through OS secure storage. You can delete history and use an app lock. These safeguards do not guarantee protection against every risk involving your device or shared copies.

CHOOSE FOR JAPANESE
Compare conversation, polite Japanese, summarization and writing using Chiko’s Japanese AI Score. Explore models from Japan and elsewhere, checking size, device compatibility and licensing. Switch models to suit your task instead of being tied to one AI. Scores reflect our own evaluation conditions, not a guarantee of accuracy.

FREE APP, NO METERED LOCAL CHAT
There is no app subscription or usage-based fee for local AI conversations. Revise a draft or ask follow-up questions without per-message or token charges. Network data charges may apply.

PUT AI TO PRACTICAL USE
Refine emails, summarize notes, translate or explore ideas. Compatible models can reference imported text with Document Knowledge.

BUILD YOUR AI TEAM
Team passes work through a Planner, Expert, Reviewer and Writer to structure, develop, review and finalize an answer. Use it to examine a proposal or revise a draft from different perspectives. One model can play all the roles.
To start, tap the model name in chat. Select 2–4 models, or enable “Look at it from several sides with one AI.” Under “How they work together,” choose Team and Apply. Send your request, review the execution plan and start. Read intermediate and final answers in chat.
Compare independent answers, combine views with Council, explore opposing sides with Debate or save a Custom workflow. More steps use time, memory and battery. Roles or agreement do not guarantee accuracy.

CONTROL EXTERNAL ACCESS
Local Only, a setting that restricts sending data to external tools, is enabled by default. It does not stop model searches, downloads or catalogue updates. You can view the network activity recorded by the app. Reports submitted through the in-app Google Form, exports and device transfers can move selected data outside your phone. Check the content and destination before sharing.

NO APP ACCOUNT REQUIRED
Start a local AI conversation without creating a Chiko account.

BEFORE YOU START
• Model downloads use data and storage. Wi-Fi is recommended.
• Speed, quality, context capacity and features depend on your device and model. Battery, memory and heat impose limits; unlimited processing is not promised.
• AI can produce incorrect or inappropriate content. Verify important answers against original documents or reliable sources.
• Check model licenses and your workplace’s information-handling rules.
• Keep your device locked and updated, and protect exported copies.