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About Mugen AI

AI power, made simple for everyone. With Mugen AI, advanced AI is easy to use—no specialist knowledge required. Mugen AI is an assistant app designed so anyone can experience the value of AI in a simple form. You don’t need to study prompts. Choose options and tap a button, and AI starts working for you right away. It includes more than 10 practical AI tools—translation, summarization, proofreading, Q&A, style conversion, idea generation, and more—so it can support your words and thinking like a helpful assistant by your side. For example: * Translation: Freely combine languages, from English and Japanese to French, Dutch, German, Tagalog, and more. * Summarization: Long text becomes clear and compact as AI captures the essentials. * Proofreading: Polish your writing from many angles with an AI eye for expression. * Style conversion: Change the tone of the same content to match the impression you want. * Idea generator: Break through creative blocks with fresh inspiration for planning and brainstorming. These are only a start. Mugen AI brings together practical know-how so more people can discover what AI can do. Download Mugen AI and try a simpler way to use AI in everyday life.

What’s new

Version 1.8 · Updated October 21, 2026

Mugen AI now runs on a newer generation of AI, bringing better answers across every tool! 【A newer AI model】 Summarize, translate, proofread, brainstorm, and more—all your familiar tools now run on a smarter, more modern AI. How you use the app and your recipe settings stay exactly the same. 【Tuned for the new AI】 We reworked the instructions behind every tool to get the most out of the new model, so translations and generated text come out in the language you chose, and formats like "Corrected Text Only" and "Idea Names Only" are followed precisely. We tested every tool extensively, right from the app, to make sure the results hold up. We'll keep refining answer quality. If a response ever looks off, let us know through Support Email in the app.

App privacy

The developer, Koichiro Kamada, reported these privacy practices to Apple.

Data Used to Track You

The following data may be used to track you across apps and websites owned by other companies:

  • Usage Data: Advertising Data

Data Not Linked to You

The following data, which may be collected but is not linked to your identity, may be used for the following purposes:

  • Usage Data: Advertising Data

Used for: Third-Party Advertising

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