Privacy

Ages 13 and up

Otowa is for people aged 13 and older. If you're under 13, please don't use it.

Guest mode: your data stays in your browser

Without an account, you don't sign up, and we don't ask for your name or email. Everything Otowa remembers is saved in your own browser's storage on this device:

• your progress: lessons and bosses finished, XP, review cards, your streak and Kana Scrolls;
• your settings, including your birthday if you give it, which is only used on your device to decide whether the 18+ switch can appear;
• your choice of visual effects;
• chapters you download for offline play: their episodes and voice audio, which you can remove from the Guild Map.

None of it is sent to us. It doesn't follow you to another device or browser, and clearing this site's data in your browser erases it for good.

Accounts: optional, and yours to delete

You can sign in with your email so your progress follows you between devices. There's no password: we email you a sign-in link. With an account, Otowa keeps:

• your email address, to sign you in;
• your progress: lessons, bosses and Kana Scroll stages finished, review cards, XP, your streak and achievements;
• your settings, including your birthday if you give it. It decides whether the 18+ switch can appear, and the switch stays off under 18 wherever it's saved;
• whether 18+ outfits are on for your account. Only we switch this, when you ask us to; it also stays off under 18.

They're stored by Supabase, our database and sign-in provider, in the European Union (Ireland). Other learners can't see it; we use it to run Otowa and nothing else, and we never sell it. Your browser also keeps a copy so lessons work offline, and remembers that you're signed in. Signing out removes both from that browser. If you were a guest before signing in, the progress in that browser joins your account.

Delete my data: on the Account page, one button deletes your account and everything kept with it, at once and for good. See Supabase's privacy policy.

Closed beta: invites and feedback

While Otowa is in closed beta, accounts need an invite code. When you use one we keep which code you joined with. If you send feedback from the feedback form we keep your message, the kind you picked, the page you were on (its address without anything after a question mark or #) and when you sent it, with your account. We read it to fix and improve Otowa; it is deleted with your account.

Purchases

Payments are handled by Tap Payments. You type your card details on Tap's own page, never on Otowa, and we never see or keep them. We give Tap your email (for your receipt), the price and what you're buying. With your account we keep what you bought, what you paid, when, and Tap's reference for the payment and any refund. See Tap's privacy policy.

If you delete your account, what you bought is deleted with it, but the record of each payment (what, how much, when and Tap's reference, without your email or account) is kept, as the law requires for sales records.

No ads, no tracking

Otowa shows no ads and sets no cookies. Voices, pictures and fonts are served from Otowa's own site. Two small tools help us keep it working, and neither follows you around:

• Visit counts. We count page views with Vercel Web Analytics, which uses no cookies and builds no profile of you: it records the page, the country and the kind of browser and device, and it can't follow you from one site, or one day, to the next. See how it handles privacy.
• Error reports. If something breaks in your browser, an error report may be sent to Sentry: what failed, the page's path (never what's after a question mark or #, so never a sign-in link), your browser and device type. No account, email or progress, and no recordings of your screen. See Sentry's privacy policy.

Hosting

The site is hosted by Vercel. Like any web host, Vercel receives the technical details every browser sends when it asks for a page, such as your IP address and browser type, to deliver the site and keep it secure, and may keep them in short-lived logs. See Vercel's privacy policy.