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Frequently asked questions
Last updated: November 11, 2026
Answers to the questions we are asked most often about NMai Intelligence Fortress. If your question is not here, please write to support@tsukiwa.co.jp.
On a smartphone
- Can I use NMai on a smartphone?
- Yes. NMai runs inside the Gmail™ app. There is nothing to install. Open any one email in the Gmail app, scroll to the very bottom, and tap 🚀 Open NMai on the card that appears. That is all you need to start using it. Put it on your home screen and it opens straight from the icon. On iPhone, you enter a connect code once at the start. The steps are in Using NMai on your phone.
- Where does the NMai card appear?
- You use NMai from inside Gmail. On a computer it appears on the right-hand side of Gmail in your browser; on a phone it appears inside the Gmail app. There is no separate app to install. If you read Gmail in a browser on your phone, the card does not appear — open your email from the Gmail app instead.
- I opened it from the home screen icon and saw “First-time setup.”
- This appears the first time you open NMai from the icon on iPhone, because the browser and a home screen icon remember things in separate places. In NMai in the browser, tap ⚙️ at the top right, tap Get a connect code, then paste the 8-character code and tap Connect. You only do this once. From then on, the icon is all you need (steps).
- Is NMai in the App Store?
- No. NMai is a Gmail™ add-on. You open it from inside the Gmail app.
- Is it a problem if someone else sees my connect code?
- It expires in 10 minutes and can only be used 3 times, but during that window it is a key that opens your NMai. Don’t show it to anyone.
- Do I lose my conversation memory when I switch devices?
- No. Memory is stored on the server, so anything you discussed on your computer continues on your phone.
- Can I speak instead of typing on my phone?
- Yes. Tap the microphone button on your keyboard and what you say is entered as text. Spoken text is masked in the same way: the words you registered are replaced before it reaches the AI.
- What can I do on my phone, and what needs a computer?
- On your phone: conversation, memory, Deep Rinc (🧠 deep recall), the Core Kernel, display language and time zone settings (⚙️ at the top right), and subscribing to or managing the paid plan. Registering the words to be masked (CK) and creating reports in Google Docs™ are done on a computer.
- I was asked to open NMai again from the card in Gmail.
- On the free plan, this appears when the month changes, or after seven days without use. Open it once from the card in Gmail and you can go back to using the app. You do not need to reinstall it. If you use it from the home screen icon on iPhone, reopen the browser side first, then reconnect with a connect code. On the paid plan, you do not need to reopen it while your subscription is active.
- Can I set masked terms from my phone?
- Not yet — masked terms (CK) are registered from NMai in Gmail™ on a computer. The words you register are replaced before anything reaches the AI. Your Core Kernel, display language, and time zone can all be changed from ⚙️ on your phone.
- I get “Sorry, unable to open the file at this time.”
- This can happen when you are signed in to more than one Google account at once. NMai keeps everything — your conversation memory and your masked terms — tied to a single Google account, so that nothing travels between accounts. When several accounts are signed in, it isn’t clear which one NMai should open under, and you get this screen. Sign in with only the account you use for NMai, or open it in a private window.
The paid plan
- Where do I subscribe to the paid plan?
- You can subscribe from “⭐ Upgrade” above the full-screen chat on a computer, or from the button at the top right of the app on a phone.
- How do I cancel?
- On a computer, use “Manage plan” under ⚙️ in the full-screen chat. On a phone, use “Manage plan” at the top right of the app. After you cancel, you can keep using the paid plan until the end of the period you have already paid for.
- What changes on the paid plan?
- You get more uses per day, you can recall memories older than 90 days, and you can use a higher-tier AI model. You also no longer need to reopen NMai from the card in Gmail.
For a fuller description of what NMai does and what it costs, see the NMai page. For the terms of your subscription, see the Terms of Service and the Seller Information. For how your data is handled, see the Privacy Policy.
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